What is ion, electrons, neutrons?
Answer:
Explanation:
Ions:
When an atom lose or gain electron ions are formed.
There are two types of ions anion and cation.
Anion:
When an atom gain electron negative charge is created and anion is formed.
X + e⁻ → X⁻
Cation:
When an atom lose electron positive charge is created and cation is formed.
X → X⁺ + e⁻
Electron:
The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.
Symbol= e-
Mass= 9.10938356×10-31 Kg
It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.
He constructed the glass tube and create vacuum in it. He applied electric current between electrodes. He noticed that a ray of particles coming from cathode to wards positively charged anode. This ray was cathode ray.
Properties of cathode ray:
The ray is travel in straight line.
The cathode ray is independent of composition of cathode.
When electric field is applied cathode ray is deflected towards the positively charged plate.
Hence it was consist of negatively charged particles.
Neutron and proton:
While neutron and proton are present inside the nucleus. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.
Symbol of proton= P+
Symbol of neutron= n0
Mass of proton=1.672623×10-27 Kg
Mass of neutron=1.674929×10-27 Kg
56.5
Which sources of evidence did Wegener use to support his theory of continental drift? Check all that apply.
fossils
land features
climate change
satellite mapping
warm equatorial climates
Answer:
fossils
land features
Explanation:
if some lands had similar fossil types, it must mean that the lands were once in the proximity of each other. For example, if Africa had the same fossils as South America, it must mean that they once we're connected, so that the animals can move freely from one continent to another. Additionally, the land features of some continents are similar to a jigsaw puzzle. It seems as though we can connect the edges based on their shape.
how can you make the gravitational force between two 50kg objects less than the gravitational force between two 5kg objects
Explanation:
The gravitational force between two 50kg objects could be less than the gravitational force between a 50kg and a 5kg object if the two 50kg objects are much farther apart.
Answer:
By increasing the distance between the two 50 kg objects compared with the distance between the 5 kg objects.
Explanation:
The formula for the force between 2 objects is
Fg = (G m1 m2) / r^2
where Fg is the force, G = gravitational constant, m1 and m2 are the masses of the objects and r = the distance between the objects.
So as r is increased Fg is decreased.
What type of rock would you be most likely to find a fossil. Explain why.
Fossils are most likely to be found in sedimentary rock because to become fossilized an organisms must be buried quickly before it is destroyed by erosion or eaten by other organisms.
What is sedimentary rock?Rocks are naturally formed consolidated material composed of grains of one or more minerals.
There are mainly three types of rocks.
Igneous rocks - Igneous rocks are defined as type of rock that are formed when molten rock cools to solid state. Sedimentary rocks - Sedimentary rocks is defined as a type of rock that are formed by accumulation or deposition of mineral or organic particles followed by cementation.Metamorphic rocks - Metamorphic rocks rises from transformation of existing rock to new type of rock in a process called metamorphism.Thus, fossils are most likely to be found in sedimentary rock.
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Action Balanced Equation Particle View (center of
screen)
Steps you took to make the
equation balanced
Make
Ammoni
a ____ N 2 + ____ H 2 ____ NH 3
Separate
Water
___ H 2 O ___ H 2 + ___ O 2
Combust
Methane
___ CH 4 + ___ O 2
___ CO 2 + ___ H 2
Answer:
N₂ + 3H₂ → 2NH₃
2H₂O → 2H₂ + O₂
CH₄ + 2O₂ → CO₂ + 2H₂O
Explanation:
A) Make ammonia:
Chemical equation:
N₂ + H₂ → NH₃
Balanced chemical equation:
N₂ + 3H₂ → 2NH₃
Step one:
N₂ + H₂ → NH₃
N = 2 N = 1
H = 2 H = 3
Step 2:
N₂ + 3H₂ → 2NH₃
N = 2 N = 1
H = 2×3 = 6 H = 3×2 = 6
Step 3:
N₂ + 3H₂ → 2NH₃
N = 2 N = 1×2 = 2
H = 2×3 = 6 H = 3×2 = 6
B) separate water:
Chemical equation:
H₂O → H₂ + O₂
Balanced chemical equation:
2H₂O → 2H₂ + O₂
Step one:
H₂O → H₂ + O₂
H = 2 H = 2
O = 1 O = 2
Step 2:
2H₂O → H₂ + O₂
H = 2×2 = 4 H = 2
O = 1×2 =2 O = 2
Step 3:
2H₂O → 2H₂ + O₂
H = 2×2 = 4 H = 2×2 = 4
O = 1×2 =2 O = 2
C) Combust methane
Chemical equation:
CH₄ + O₂ → CO₂ + H₂O
Balanced chemical equation:
CH₄ + 2O₂ → CO₂ + 2H₂O
Step one:
CH₄ + O₂ → CO₂ + H₂O
C = 1 C = 1
H = 4 H = 2
O = 2 O = 3
Step 2:
CH₄ + 2O₂ → CO₂ + H₂O
C = 1 C = 1
H = 4 H = 2
O = 2×2 = 4 O = 3
Step 3:
CH₄ + 2O₂ → CO₂ + 2H₂O
C = 1 C = 1
H = 4 H = 2×2 = 4
O = 2×2 = 4 O = 2 + 2 = 4
Need help converting 4.82 mmol of diphenylmethanol to grams (C13H12O)
Answer:
Mass = 0.89 g
Explanation:
Given data:
Moles of diphenylmethanol = 4.82 mmol
Mass = ?
Solution:
we will convert the mmol into mols.
4.82 /1000 = 0.0048 mol
Molar mass of diphenylmethanol = 184.23 g/mol
Formula:
Mass = number of moles × molar mass
Mass = 0.0048 mol × 184.23 g/mol
Mass = 0.89 g
Classify the reaction between zinc and acetic acid and explain, in general terms,
what happens during this type of reaction.
Answer:
The reaction between zinc and acetic acid is a single-replacement reaction. During this type of reaction basically one element replaces one compound.
The balanced equation for the reaction between zinc and acetic acid is
Zn(OH)_2 +2CH_3 COOH ----> Zn(CH_3COO)_2+2H 2O
Or this might help too!
Balanced Chemical Equation
A balanced chemical equation is defined as the chemical equation which has an equal number of atoms on both sides of the reaction arrow. A balanced chemical equation is based on the law of conservation of mass.
Answer and Explanation:
Below is the reaction between acetic acid and Zinc:
Z n + 2 H C 2 H 3 O 2 → Z n ( C H 3 C O O ) 2 + H 2
This reaction is an example of a reaction between an acid and a metal. When an acid reacts with a metal, salt, and Hydrogen gas forms. The Hydrogen gas formed here can be tested as it burns with a POP sound.
Hope this helps!!!
The reaction between zinc and acetic acid is a single replacement reaction where zinc displaces hydrogen from acetic acid, forming zinc acetate and releasing hydrogen gas.
The reaction between zinc and acetic acid is a type of single replacement reaction, also known as a displacement reaction, a common type of reaction in chemistry. In a single replacement reaction, a more reactive metal displaces a less reactive metal from its compound. Here, zinc is more reactive than is the hydrogen in acetic acid.
During this reaction, zinc will displace the hydrogen atoms from acetic acid, forming zinc acetate and releasing hydrogen gas. The general chemical equation for this reaction is:
2 Zn ( s ) + 2 CH₃ COOH ( aq ) → 2 Zn ( CH₃ COO )₂ ( aq ) + H₂ ( g )
Since zinc is a very reactive metal, when it is placed in an acid like acetic acid or hydrochloric acid, it will undergo a redox reaction where zinc is oxidized, and hydrogen ions from the acid are reduced, resulting in the evolution of hydrogen gas which can be observed as bubbling. Hydrogen gas is a common product when metals react with acids.
If two animals can reproduce and produce fertile offspring, then they are members of the same ________________.
Question 2 options:
A. ecosystem
B. population
C. species
D. community
Answer:
The answer is C. Species
Answer: Species
Explanation:
If two animals can reproduce and the offspring that is produced is also fertile then it can be said that they are members of the same species.
The population of the same species live together in search of food, mate with each other to produce offspring, compete for food and compete for other resources.
It does not matters that the organism live in the same place or different, if they mate and produce a fertile offspring they belong to the same species.
6. Which of the following best helps to account for the fact that the F-ion is smaller than the 02-ion?
a. F has a larger nuclear mass than 0 has.
b. F has a larger nuclear charge than OP has.
c. F is more electronegative than O2-is.
d. F is more polarizable than 02 is.
Answer:
F has a larger nuclear charge than[tex]O_2[/tex] account for the fact that the F-ion is smaller than the [tex]O_2[/tex]-ion
Explanation:
The 'effective nuclear charge' of an polyelectronic atom, denotes the net positive(+ve) charge that experienced by an electron. The "strength of the nuclear charge" can be determined based on the oxidation-number of an atom which determines the number of electron that is lost or gained by elements.
F-ion is smaller when compared with O2-ion because of the larger nucleus charge of the F-ion. This is because of the presence of more protons in F-ion that pulls the electrons on the shell’s outside, thus making it smaller.
What is the electromagnetic spectrum?
A. A list of all the different types of waves
B. A chart of frequencies of light waves
O
C. An organization of waves based on what forms them
D. A separation of just the visible part of light waves
Answer:
B. A chart of frequencies of light waves
Explanation:
Answer:
b
Explanation:
Match the property with the correct type of metal.
Answer:
basically i quess
Explanation:
Answer:
for alkali metals its soft extremely reactive and 1 valence electrons
alkaline earth metals is 2 valence electrons and harder more dense
What type of reaction is chlorine and potassium iodide
Answer:
single displacement reaction
Explanation:
Cl2 + 2KI = I2 + 2KCl
This is single displacement reaction.
Answer:
Single displacement reaction
Explanation:
When Potassium Iodide reacts with chlorine, the following reaction occurs
2KI + Cl₂ ⇒ 2KCl + I₂
From the reaction above, it can be deduced that chlorine replaces iodine in potassium iodide to form potassium chloride. This type of reaction is called a single displacement reaction. And it usually occurs when a more reactive element displaces a less reactive element from it's compound.
Chlorine is more reactive than iodine and as such can displace iodine from a solution (just as it is in the equation above).
NOTE: A single displacement reaction is a reaction in which an element (just one) replaces another element in a compound during the course of a reaction.
Hydrogen 3 has a half life of 12.32 years a sample of h-3 weighing 3.02 grams is left for 15.0 years what will the final weight of H-3 sample be?
Answer:
The final mass of sample is 1.3 g.
Explanation:
Given data:
Half life of H-3 = 12.32 years
Amount left for 15.0 years = 3.02 g
Final amount = ?
Solution:
First all we will calculate the decay constant.
t₁/₂ = ln² /k
t₁/₂ =12.32 years
12.32 y = ln² /k
k = ln²/12.32 y
k = 0.05626 y⁻¹
Now we will find the original amount:
ln (A°/A) = Kt
ln (3.02 g/ A) = 0.05626 y⁻¹ × 15.0 y
ln (3.02 g/ A) = 0.8439
3.02 g/ A = e⁰°⁸⁴³⁹
3.02 g/ A = 2.33
A = 3.02 g/ 2.33
A = 1.3 g
The final mass of sample is 1.3 g.
Answer:
The anwer is 1.30 in plato
Explanation:
Copper (II) Sulfate pentahydrate, CuSO4 X 5H20 is heated in an open crucible to remove the water. (a) Diagram the lab set up clearly labelling the key chemicals and materials needed. (b) The initial mass of the sample is 8.00 g and after heating the new mass is 6.50 g. Based on this data is the compound completely dried or is additional heating required? Provide evidence including calculations and written reasoning for credit.
The water molecules are not completely removed so additional heating is required.
Explanation:
We have the copper (II) sulfate pentehydrate with the chemical formula CuSO₄ · 5H₂O.
molar mass of CuSO₄ · 5H₂O = 159.6 + 5 × 18 = 249.6 g/mole
Knowing this, we devise the following reasoning:
if in 249.6 g of CuSO₄ · 5H₂O there are 90 g of H₂O
then in 8 g of CuSO₄ · 5H₂O there are Y g of H₂O
Y = (8 × 90) / 249.6 = 2.88 g of water
mass of dried CuSO₄ = mass of CuSO₄ · 5H₂O - mass of H₂O
mass of dried CuSO₄ = 8 - 2.88 = 5.12 g
5.12 g is less that the weighted mass of 6.50 g. We deduce from this that the sample needs additional heating in order to remove all the water (H₂O) molecules.
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Which of the following units is best when measuring the length of an object?
meters
cubic meters
kilograms
kilograms per cubic meter
Answer:metres
Explanation:It would be best to measure the length of an object in metric system such as millimeter, centimeter, mere etc..
The best unit to measure the length of an object is meters.
Answer: Option A
Explanation:
Length is defined as the distance covered by any object from one end to another end of the object. It can also be termed as single dimension of the object. It is a measuring variable and like all measuring variables, it also has SI unit. The SI unit to determine the length of any object is meter.
So among the given options, cubic meters can't be the correct unit for length because it has three dimensional variable while length is a single dimensional variable. Similarly, kilograms is the unit of weight or mass of any object and kilogram per cubic meter is for density of any object. Thus the best unit for measuring the object's length is meters.
As you add electrons to an energy level, without adding more protons are there more or less repulsive
forces between the electrons?
Answer:
There will be more repulsive force between the electrons.
Explanation:
Electrons contain negative charge.As a result the electron will repulse another adjacent negatively charged electron.
According to the given question addition of electrons to en energy level without adding more protons will increase the overall negative charge in the the energy level in which the electrons are added.
This ultimately leads to generate more repulsive force between the electrons.
The modern periodic table is organized by?
A. Atomic number
B. Number of protons in each element
C. atomic weight
D. Chemical properties
Answer:
"A" Atomic number
Explanation:
The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number.
The modern periodic table is organized by the atomic number of each element.
The atomic number of an element represents the number of protons in the nucleus of its atoms. Each element has a unique atomic number, which determines its position in the periodic table. The periodic table is arranged in order of increasing atomic number from left to right and top to bottom.
The organization by atomic number is important because it reflects the fundamental property of an element. Elements with similar chemical behaviors are grouped together in the same columns, known as groups or families. These groups have similar valence electron configurations, which determine the chemical properties of the elements.
For example, all the elements in Group 1, also known as the alkali metals, have one valence electron and tend to be highly reactive. Elements in Group 18, known as the noble gases, have a full valence electron shell and are generally unreactive.
The periodic table also organizes elements based on their atomic weight, but this is not the primary factor in determining the arrangement. Atomic weight is the average mass of all the isotopes of an element, taking into account the relative abundance of each isotope. However, the atomic number provides a more precise and unique identifier for each element.
In summary, the modern periodic table is organized by the atomic number of each element, which reflects the number of protons in the nucleus. This arrangement helps group elements with similar chemical properties together, making it easier to study and understand the behavior of different elements.
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A 2.5 L sample of gases at STP (standard temperature and pressure is 273 k and 1.00 atm). When the temperature is raised to 273degrees Celsius and the pressure remains constant the new volume of the gas will be?
Answer:
x = 5.9
Explanation:
The volume of a gas sample at STP (2.5 L and 273 K) that is heated to 273 degrees Celsius at constant pressure will double to 5.0 L.
To solve this, we'll use Charles's Law, which states that the volume of a gas is directly proportional to its temperature (in Kelvins) when pressure is held constant. The formula for Charles's Law is V1/T1 = V2/T2. The initial volume (V1) is 2.5 L and the initial temperature (T1) is 273 K (which is STP). The final temperature (T2) is 273 degrees Celsius, which needs to be converted to Kelvins by adding 273, resulting in T2 = 546 K.
Now, we can solve for the new volume (V2):
V1/T1 = V2/T22.5 L / 273 K = V2 / 546 KV2 = (2.5 L × 546 K) / 273 KV2 = 5.0 LSo, when the temperature is raised to 273 degrees Celsius and the pressure remains constant, the new volume of the gas will be 5.0 L.
Standard conditions of temperature and pressure for a thermochemical equation are____.
Final answer:
STP for thermochemical equations is 273.15 K and 1 bar, previously it was 1 atm. It serves as a reference for reporting thermodynamic properties.
Explanation:
The standard conditions of temperature and pressure (STP) for a thermochemical equation are defined as a temperature of 273.15 K (0°C) and a pressure of 1 bar (100 kPa). It is important to note that previously, the old definition used a standard pressure of 1 atm. Under these conditions, we can calculate properties of gases and thermochemical data such as enthalpies of formation. For species in solution, the standard condition is a concentration of 1 Molar (1 mol/L). Pure substances are considered in their most stable form at 1 atm and at the standard temperature, unless otherwise noted in a specific text.
Significance of STP in Thermochemical Equations
The significance of STP in thermochemical equations lies in its use as a benchmark for reporting the thermodynamic properties of substances. This consistent baseline allows for the comparison and understanding of data, such as enthalpies of formation, which are essential for studying chemical reactions and processes.
The answer is option A - 0°C and 101 kPa. Standard conditions of temperature and pressure for a thermochemical equation are 0°C and 101 kPa.
Standard conditions of temperature and pressure (STP) for thermochemical equations are 0°C and 101 kPa, equating to 0°C (273.15 K) and 1 bar (100 kPa). This set of conditions is referred to as standard temperature and pressure (STP), which is defined as 0°C (273.15 K) and 1 bar (100 kPa). However, it's important to note that there have been different definitions over time, with an older definition using 1 atm (101.325 kPa) instead. For most thermochemical data and calculations, STP is used as a reference point to enable comparisons of the properties of different gases.
The question is:
Standard conditions of temperature and pressure for a thermochemical equation are _____.
A. 0°C and 101 kPa.
B. 25°C and 101 kPa.
C. 0°C and 0 kPa.
D. 25°C and 22.4 kPa.
Many common household substances may be classified as acids or bases. According to the pH scale,
A) baking soda is a weak base while bleach is a strong base
B) coffee is a weak acid while drain cleaner is a strong acid
C) oven cleaner is a weak acid while battery acid is a strong acid
D) soft drinking water is a weak base while soapy water is a strong base
Answer:
the answer is a
Explanation:
According to the pH scale, baking soda is a weak base while bleach is a strong base. Therefore, option (A) is correct.
What are acids and bases?An acid is any substance that is capable of donating a proton to another substance. A base is a molecule or ion that is capable to accept a hydrogen ion from an acid.
Acidic substances are generally identified by their sour taste. An acid is commonly a molecule that can donate an H⁺ ion and can be energetically favorable after a loss of H⁺ ion. Acids are also known to turn blue litmus paper into the red.
Bases are characterized by a bitter taste and a slippery texture. A base t can dissolve in water is also referred as an alkali. When bases chemically react with acids, they yield salts and water as products. Bases are also known to turn red litmus paper into the blue.
The pH value of the acids lies between 0 to 7 and the pH value of the acids lies between 7 to 14. Baking soda is a weak base that has a pH value of around 8 to 9 and bleach is a strong base that has a pH value of around 13.
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2 different elements have the same number of neutrons
Answer:
Sodium and Magnesium are the two different element having same number of neutrons.
Explanation:
Neutron:
It is a subatomic particle,but without an electric charge,present in all the atomic nuclei except those of ordinary hydrogen.
Its symbol is n with no charge on it.
sodium and magnesium have the same number of neutrons.
name of the element : Sodium
symbol: Na
atomic number: 11
number of protons: 11
number of neutrons: 12
number of electrons: 11
distribution of electrons: 2 , 8 , 1
valency: 1
name of the element : Magnesium
symbol: Mg.
atomic number: 12
number of protons: 12
number of neutrons: 12
number of electrons: 12
distribution of electrons: 2 , 8 , 2
valency: 2
A gas barbecue burns propane gas to generate heat. Propane gas becomes carbon dioxide gas and water vapor as it burns. Oxygen from the air is a reactant in this process. This is an example of a chemical reaction.
Why is burning propane gas a chemical reaction?
1. The atoms in propane and oxygen rearrange to form other substances after the reaction.
2. The atoms that make up propane and oxygen change into different atoms after the reaction.
3. Oxygen is involved. Any process involving oxygen is a chemical reaction.
4. The water vapor that forms after the reaction is in the gas phase.
Answer:
1. The atoms in propane and oxygen rearrange to form other substances after the reaction.
Explanation:
Chemical change:
The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.
These changes are irreversible
These changes occur due to chemical reactions
These may not be observed with naked eye
Example:
Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood
Boiling of egg: that change the chemical composition of protein in the egg .
The burning of propane is also a chemical change because propane and oxygen converted into water and carbon dioxide by rearrangement of atoms.
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
How many moles of aluminum oxide al2o3 are in a sample with a mass of 204.0
Answer:
2 moles
Explanation:
Let us first start by calculating the molecular mass of Al₂O₃.
The mass of a mole of any compound is called it's molar mass. 1 molar mass 6.02 X 10²³, or Avogadro's number, of compound entities.
Say, 1 mole of Al₂O₃ has 6.02 X 10²³ of Al₂O₃ molecules/atoms. It also has 2*6.02 X 10²³ number of Al atoms and 3*6.02 X 10²³ number of O atoms.
Molecular mass of Al : 26.981539 u
Molecular mass of O: 15.999 u
Therefore, molecular mass of Al₂O₃ is:
= [tex](2*26.981539) + (3*15.999)[/tex] u
= 101.960078 u
This can be approximated to 102 u.
1mole weighs 102 u
So, 2moles will weigh 2*102 = 204 u
Answer:
2 moles
Explanation
Molecular mass of Al : 26.981539 u
Molecular mass of O: 15.999 u
The molecular mass of Al₂O₃ is:
= 101.960078 u
This can be approximated to 102 u.
1mole weighs 102 u
So, 2moles will weigh 2*102 = 204 u
4. I'm the "brain" of the cell or so they say. I regulate activities from day to day...
Answer:
nucleus
Explanation:
it holds information needed to regulate most of the cell functions
The 'brain' of the cell is the nucleus, which regulates cell activities by managing genetic material and essential functions like growth and protein synthesis. It ensures the proper functioning of the cell, similar to the role of the human brain, which controls both mental and physical processes.
The "brain" of the cell is commonly referred to as the nucleus. Like the human brain, which is the control center of the body, the nucleus regulates the activities of the cell. It holds the cell's genetic material and is responsible for managing activities such as growth, metabolism, protein synthesis, and cell division.
The human brain, on the other hand, controls mental processes such as reasoning, imagination, memory, and language as well as physical processes like breathing and heartbeat. Both the nucleus and the human brain are essential for the proper functioning of their respective systems.
A typical day in the life of a cell involves the nucleus sending instructions for protein synthesis, which are necessary for the cell to carry out specific functions. Without the nucleus, a cell would not be able to operate efficiently, just as without the human brain, a body could not function.
Sodium metal reacts with water to form hydrogen gas: 2 Na + 2 H2O -> 2 NaOH + H2. 10 moles of Na thrown into a large volume of water will produce
Answer:
Only 10 mole of water will react with 10 mole of Na metal
and produce
10 moles of NaOH5 moles of H₂ gasHeat10Na + 10H₂O --------------> 10NaOH + 5H₂
Explanation:
2Na + 2H₂O -------------> 2NaOH + H₂
Exothermic Reaction:
This reaction is supper exothermic and when sodium metal react with water it produce a lot of heat.
Limiting Reagent:
Limiting reagent is the amount of reactant in a chemical reaction that determines the amount of products that will be produce.
For instance we will use the same equation
2Na + 2H₂O --------------> 2NaOH + H₂
The reaction shows that 2 mole of sodium combine with 2 mole of water and will produce 2 mole of NaOH and 1 mole of Hydrogen gas.
if we increase the amount of water to 4 mole then the same amount of product will form, and the extra water will remain unracted.
Similarly if we increase amount of Na to 4 mole then only 2 mole will react and will produce same amount.
Now
if we add 10 mole of Na to a large Volume of water following thing will happen
only that amount of water will be used that requires for 10 mol of NaThe extra water will remain unreactedNaOH will producedHydrogen gas will evolveGiven Reaction:
2Na + 2H₂O --------------> 2NaOH + H₂
Data from Reaction:
2Na + 2H₂O --------------> 2NaOH + H₂
2 mole 2mole 2mole 1mole
Applying unity formula:
2 mole of Na will react with 2mole of water
So
2 mole of Na ≅ 2mole of H₂O
10 mole of Na = 10 mole of H₂O
So the same reaction will occur and produce NaOH and hydrogen gas
So, From the above reaction
2 mole of Na ≅ 2mole of NaOH
if 2 mole of Na produces 2 mole of NaOH then 10 mole will produce how much NaOH
apply the unity formula
2 mole of the Na ≅ 2 mole of NaOH
10 mole of the Na ≅ X mole of NaOH
so by cross multiplication
2 mole of Na x X mole of NaOH ≅ 2 mole of NaOH x 10 mole of the Na
we have to find moles of NaOH ....so by rearrangement of the above equation
X mole of NaOH = 2 mole x 10 mole
2 mole
X mole of NaOH= 10 mole
So
10 mole of Na will produce 10 mole NaOH
*****For Hydrogen Gas that produce :
2 mole of Na ≅ 1 mole H₂
If 2 mole of Na produces 1 mole of H₂ then 10 mole will produce how much H₂
apply the unity formula
2 mole of the Na ≅ 1 mole of H₂
10 mole of the Na ≅ X mole of H₂
so by cross multiplication
2 mole of Na x X mole of H₂ ≅ 1 mole of H₂ x 10 mole of the Na
we have to find moles of H₂ ....so by rearrangement of the above equation
X mole of H₂ = 1 mole x 10 mole
2 mole
X mole of H₂ = 5 mole
So
The following will be reaction if 10 moles Na thrown in large volume of water
Only 10 mole of water will react with it
10Na + 10H₂O --------------> 10NaOH + 5H₂ and heat
Which best describes this reaction between magnesium and oxygen? decomposition and redox reactions single-replacement and redox reactions double-replacement and redox reactions combustion and redox reactions
Answer:
Combustion and redox
Explanation:
Magnesium is burned in the presence of oxygen and form magnesium oxide.
The oxidation -reduction also take place that's why the given reaction is redox.
These reactions are take place by gaining or losing the electrons and oxidation state of elements are changed.
Oxidation:
Oxidation involve the removal of electrons and oxidation state of atom of an element is increased.
Reduction:
Reduction involve the gain of electron and oxidation number is decreased.
Consider the following reactions.
2Mg + O₂ → 2MgO
the oxidation state of magnesium is changed from 0 to +2 so it get oxidized.
The oxidation state of oxygen is changed from 0 to -2 so it get reduced.
The reaction between magnesium and oxygen is best described as a combustion and redox reaction, with magnesium being oxidized as it burns in the presence of oxygen to form magnesium oxide.
Explanation:The reaction that best describes the interaction between magnesium and oxygen is a combustion and redox reaction. When magnesium reacts rapidly with oxygen upon ignition, it combines with oxygen from the air to form a fine powder of magnesium oxide, as represented by the chemical equation 2Mg (s) + O₂(g) → 2MgO (s). This process is considered a combustion reaction because magnesium is burning in the presence of oxygen, and it is also a redox reaction because there is a transfer of electrons, with magnesium being oxidized and oxygen being reduced.
A compound that conducts electricity when dissolved in water would most likely be classified as
Final answer:
A compound that conducts electricity when dissolved in water is classified as an electrolyte. Strong electrolytes completely ionize and provide many ions, leading to better conductivity. Nonelectrolytes do not produce ions and therefore do not conduct electricity.
Explanation:
A compound that conducts electricity when dissolved in water would most likely be classified as an electrolyte. Electrolytes are substances that produce ions in solution, thereby allowing the solution to conduct electricity. When ionic compounds dissolve in water, they dissociate into cations and anions, which are mobile and can carry electrical charge through the solution. Strong electrolytes dissociate completely, providing a large number of ions, and include most soluble ionic compounds such as NaCl and strong acids like HCl. On the other hand, weak electrolytes only partially ionize in solution and do not conduct electricity as well, such as weak acids and weak bases. Solutions that do not conduct electricity are typically solutions of nonelectrolytes, which consist of molecules that do not produce ions when dissolved, like sugar or ethanol.
How is ionization energy related to how easily an electron can be lost from an atom?
Answer:
Larger the size of atom lower will be ionization energy and it become easier to remove the electron.
Explanation:
Atomic radius
As we move from left to right across the periodic table the number of valance electrons in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required.
Atomic radii trend along group:
As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased. Thus less energy is required to remove the electron from atom.
Final answer:
Ionization energy is the energy required to remove an electron from an atom and is related to the atom's ability to lose electrons. It increases across a period due to higher effective nuclear charge and decreases down a group as atomic size increases.
Explanation:
Ionization energy is directly related to how easily an electron can be lost from an atom. It is defined as the amount of energy needed to remove an electron from an atom. As you move across a row on the periodic table, the ionization energies generally tend to increase, which means it becomes more difficult to remove an electron because the effective nuclear charge on the valence electrons increases.
Trends Across the Periodic Table
Elements on the left side of the periodic table can lose electrons more easily, as they require less energy to remove an electron than those on the right side of the periodic table. This is because atoms on the left have fewer protons and a smaller nuclear charge, reducing their ability to hold onto their valence electrons tightly.
Trends Down the Groups
Within a group on the periodic table, the ionization energy decreases as you move down the group. This is due to the atomic radius increasing, which means the outermost electrons are farther from the nucleus and experience less electrostatic pull, making them easier to remove.
The energy required to remove successive electrons from an atom increases, so removing the third, fourth, fifth, and so on, electrons from an atom requires progressively greater amounts of energy, especially when an electron is removed from a filled inner shell.
What is the product if an atom of Po-209
undergoes alpha decay?
Lead-205 (Pb-205)
Explanation:We are given;
An atom of Po-209We are supposed to identify its product after an alpha decay;
Polonium-209 has a mass number of 209 and an atomic number of 84.When an element undergoes an alpha decay, the mass number decreases by 4 while the atomic number decreases by 2.Therefore, when Po-209 undergoes alpha decay it results to the formation of a product with a mass number of 205 and atomic number of 82.The product from this decay is Pb-205, because Pb-205 has a mass number of 205 and atomic number 82.The equation for the decay is;²⁰⁹₈₄Po → ²⁰⁵₈₂Pb + ⁴₂He
Note; An alpha particle is represented by a helium nucleus, ⁴₂He.Chemistry Smart people please help me out I will give you the brainiest I need help!
Magnesium has two valence electrons and oxygen has six valence electrons. The electronegativity difference between the two elements is 2.13.
How can the octet rule be used to explain the bonding between magnesium and oxygen?
Oxygen needs access to two electrons to satisfy the octet rule. Magnesium prefers to lose two valence electrons to satisfy the octet rule. Oxygen can remove two electrons from magnesium, forming ions; leading to an ionic bond.
Oxygen needs to lose six electrons to satisfy the octet rule. Magnesium needs access to six valence electrons to satisfy the octet rule. Magnesium can remove six electrons from oxygen, forming ions and leading to an ionic bond.
Oxygen needs access to two electrons to satisfy the octet rule. Magnesium prefers to lose two valence electrons to satisfy the octet rule. Magnesium and oxygen can share two electrons, leading to a covalent bond.
Oxygen needs to lose six electrons to satisfy the octet rule. Magnesium needs access to six valence electrons to satisfy the octet rule. Magnesium and oxygen can share six electrons, leading to a covalent bond.
Answer: Mg loses two electrons to have an octet. Oxygen gains two electrons to have an octet. The ionic bond between ions results from the electrostatic attraction of opposite charges. The final formula of magnesium oxide is MgO.
Explanation: I am like 97% sure it is correct