The isotopes hydrogen-2 (deuterium) and hydrogen-3 (tritium) differ in the number of neutrons in their nuclei. Option B is the answer.
Explanation:The isotopes hydrogen-2 (deuterium) and hydrogen-3 (tritium) have different numbers of neutrons in their nuclei. Deuterium has one more neutron than hydrogen-1, while tritium has two more neutrons than hydrogen-1. The difference in the number of neutrons gives these isotopes different properties and behaviors.
Option B is the correct answer: tritium has one more neutron than deuterium. The number of electrons and protons in isotopes of an element remains the same, so options A and C are incorrect. Option D is also incorrect because deuterium and tritium are different isotopes of hydrogen with different numbers of neutrons.
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a metal has a mass of 54g and a volume of 9 cm. what is the density of the meatal
Answer:
6gm/cm³
Explanation:
It's simple,
The formula to Density is as follows,
Mass
Density = --------
Volume
Grams is a measurement of Mass and Cubic center meters is a measurement of Volume. Thats why we will fill in the formula like this,
54
D = -------
9
Then we divide to get,
D = 6
Next we fill in the units which are grams and cubic centimeters. The initials for the 2 are gm and cm³ so we'll combine those into this,
gm/cm³
Next we combine our answers which also brings us to our answer- 6 gm/cm³
Hope I was helpful,
Toodles
name the following hydrocarbons
Answer:
1) 3-methylpentane 2)Butyne
Explanation:
On the first molecule, we have a methyl group on the 3rd carbon, so you will have "3-methhyl". It's a 5 carbon molecule with no double bonds, so "-pentane" is required.
On the second molecule, we have a simple 4 carbon molecule with a triple bond which makes it an Alkyne. 4 carbons makes the prefix "but-" and a alkyne males the ending "-yne".
Calculate the molar mass of NH4NO3.
Answer:
80.043 g/mol
Explanation:
Ammonium nitrate is a chemical compound, the nitrate salt of the ammonium cation. It has the chemical formula NH ₄NO ₃, simplified to N₂H₄O₃. It is a white crystalline solid and is highly soluble in water. It is predominantly used in agriculture as a high-nitrogen fertilizer.
How many moles of Ag will be produced from 16g of Cu, assuming AgNO3 is available in excess
Answer:
Assuming the reaction you are referring to is the following:
AgNO3 + Cu --> Cu(NO3)2 + Ag
First, we should balance the reaction:
2 AgNO3 + Cu --> Cu(NO3)2 + 2 Ag
Now we carry out dimensional analysis, taking into account the molar ratios of different species as given in the balanced reaction and molar masses (which we can look up in the periodic table).
We begin with what we know, which is that we have 16.0 g Cu reacting and work our way toward the quantity that we would like to calculate, namely moles of Ag.
16.0 g Cu x 1 mol Cu x 2 mol Ag = 0.504 mol Ag
63.5 g Cu 1 mol Cu
Definition: This is an alternative form of a gene.
Answer:
The correct term for the definition is Allele.
2.0801 mol of bromine gas is held at 4.258 atm and 284.92 K. What is the volume of its container in liters?
Answer:
11.427L
Explanation:
From the ideal gas law,
PV=nRT
Where;
P=pressure of the gas
V=volume of the gas occupied by the container
n=number of moles of the gas
R=the ideal gas constant=0.0821atmL/mol/K
Given
P=4.258atm
V=?
n=2.0801mol
T=284.92K
From the equation
PV=nRT,
We will make V subject of formula
V=nRT/P
Let's now substitute the values
V=(2.0801×0.0821×284.92)/4.258
V=11.427L
Therefore, the volume of the container is 11.427L
Answer:
11.41L
Explanation:
Data obtained from the question include:
n (number of mole of Br2) = 2.0801 mol
P (pressure) = 4.258 atm
T (temperature) = 284.92K
R (gas constant) = 0.082atm.L/Kmol
V (volume of the container) =?
Applying the ideal gas equation PV = nRT, the volume of the container can be obtained as follow:
PV = nRT
4.258 x V = 2.0801x0.082x284.92
Divide both side by 4.258
V = (2.0801x0.082x284.92)/4.258
V = 11.41L
Therefore, the volume of the container is 11.41L
The average distance between molecules always increases during which of the following phase changes?
A. gas to solid
B. liquid to gas
C. gas to liquid
D. liquid to solid
Answer:
B. liquid to gas
Explanation:
Matter exists in 3 different states:
- Solid: in solids, particles in the substance are tightly bond to each other through strong intermolecular forces. Therefore, they can only vibrate around their fixed position, but they cannot move freely: as a result, the distance between the particles is the smallest among the 3 states of matter.
- Liquid: in a liquid, particles are able to slide past each other, however there are still intermolecular forces keeping them not too far from each other. As a result, in liquids, particles are on average more distance from each other compared to solids.
- Gas: in a gas, particles are completely free to move, as the intermolecular forces between them are negligible. As a result, in gases, the distance between molecules is the greatest, compared with solids and liquids.
Therefore, the phase changes in which the average distance between molecules increases is:
B. liquid to gas
If objects at the same distance suddenly decreased in mass the gravitational force between them would
Answer:
Gravitational force is also decreases.
Explanation:
Gravitational force is directly proportional to the mass of an object and inversely properly to the distance between their centres. Directly means if one increases the other automatically increases or if one decreases, the other also decreases. There is a direct relationship between mass and gravitational force so if mass of the bodies decrease, the gravitational force is also decreases.
Answer:
Explanation:
If the mass increases the the gravitational force will increase same as if the mass decreases the gravitational force will decrease as well.
PV = k, where Pis pressure, Vis volume, and k is a constant
Question 1
Suppose you have a gas in a container being pressed down by a piston. The initial volume of the gas is 5.0 m3 and
the pressure is 7.5 mmHg. If the volume decreases to 4.0 m, what is the pressure? (The product of the volume and
pressure remain constant.)
(5.0 m)(7.5 mmHg) = (P)(4.0 m)
Answer:
9.38mmHg
Explanation:
V₁ = 5m³
P₁ = 7.5mmHg
V₂ = 4.0m³
P₂ = ?
Applying Boyle's law,
The volume of a fixed mass of of gas is inversely proportional to its pressure as long as temperature is kept constant.
P = k / V
P₁ * V₁ = P₂ * V₂
v₂ = (p₁ * v₁) / v₂
V₂ = (5.0 * 7.5) / 4.0
v₂ = 9.375 ≈ 9.38mmHg
The new volume of the gas is 9.38mmHg
NEED HELP!!!
Match the following words with their definitions.
1.
number of protons in an atom
neutron
2.
negatively charged particle circling nucleus
nucleus
3.
matter made up of just one type of atom
element
4.
building block of matter
proton
5.
neutrally charged particle nucleus
atomic number
6.
center of the atom made up of protons and neutrons
electron
7.
positively charged particle in the nucleus
atom
Answer:
1.atomic number
2.electron
3.element
4.atom
5.neutron
6.nucleus
7.proton
Explanation:
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The matching exercise pairs terms like 'atomic number' and 'electron' with their correct definitions. The sum of protons and neutrons in an atom's nucleus is the 'mass number,' and the space where electrons are most likely to be found around the nucleus is known as an 'electron shell.'
number of protons in an atom - atomic numbernegatively charged particle circling nucleus - electronmatter made up of just one type of atom - elementbuilding block of matter - atomneutrally charged particle in nucleus - neutroncenter of the atom made up of protons and neutrons - nucleuspositively charged particle in the nucleus - protonNow, to address the descriptions provided
(a) The sum of the number of protons and neutrons in an atom is known as the mass number.
(b) The defined space around an atom's nucleus, where an electron is most likely to be found, is called an electron shell or energy level.
What is the volume of a 0.120 M solution that contains 9.35 g of HCI?
Answer:
2.13L
Explanation:
first you must find the amount(mols) of HCl in the solution. then you can use that to find the volume of the solution.
we know the:
mass m = 9.35g
molar mass M = 1 + 35.5=36.5 g/mol ( check periodic table )
concentration c = 0.120 mol/L
amount ( mols) of HCl:
n= m/M
n(HCl) = 9.35/36.5
= 0.2561644 mol
concentration of HCl in solution:
n= cV
V(HCl) = n/c
= 0.2561644/0.120
= 2.1347
= 2.13 L (3sf)
Final answer:
To find the volume of the solution, we can use the equation C₁V₁ = C₂V₂, where C₁ and V₁ are the concentration and volume of the stock solution, and C₂ and V₂ are the desired concentration and volume of the diluted solution.
Explanation:
To find the volume of the solution, we can use the equation:
C₁V₁ = C₂V₂
Where C₁ and V₁ are the concentration and volume of the stock solution, and C₂ and V₂ are the desired concentration and volume of the diluted solution. Rearranging the equation to find V₂:
V₂ = (C₁V₁) / C₂
Plugging in the given values, we have:
V₂ = (0.120 M * V₁) / 0.120 M
V₂ = V₁
Dalton's atomic theory
John Dalton provided the basic theory about the nature of matter, which came to be known as Dalton's atomic theory.
According to Dalton's atomic theory, all matter is composed of small particles called atoms.
Dalton provided some postulates of this theory. Some of the important ones are:
All matter is made of very tiny particles called atoms, which participate in chemical reactions.Atoms are indivisible particles, which cannot be created or destroyed in a chemical reaction.Atoms of a given element are identical in mass and chemical properties.Atoms of different elements have different masses and chemical properties.Atoms combine in the ratio of small whole numbers to form compounds.The relative number and kinds of atoms are constant in a given compound.So, as we see in the postulates, Dalton's atomic theory provided an explanation for the law of conservation of mass and the law of definite proportions.
The postulate of Dalton's atomic theory, i.e., "Atoms are indivisible particles, which cannot be created or destroyed in a chemical reaction." is the result of the law of conservation of mass.
The postulate "The relative number and kinds of atoms are constant in a given compound." can explain the law of definite proportion.
However, later it was found that there are some drawbacks of Dalton's atomic theory.
The postulate "Atoms are indivisible particles, which cannot be created or destroyed in a chemical reaction." was proven wrong. Atoms can be further divided into three subatomic particles: electrons, protons, neutrons.Dalton's atomic theory says "Atoms of a given element are identical in mass and chemical properties.". However, atoms of the same element can have slightly different masses.The theory says "Atoms of different elements have different masses and chemical properties." But, even atoms of different elements can have the same mass.Hope you could understand.
If you have any query, feel free to ask.
What is the mass in grams
of 2.25 mol of the element
iron, Fe?
Answer:
126g
Explanation:
Data obtained from the question include:
Mole of Fe = 2.5moles
Molar Mass of Fe = 56g/mol
Mass of Fe =?
Number of mole = Mass/Molar Mass
Mass = number of mole x molar Mass
Mass of Fe = 2.25 x 56
Mass of Fe = 126g
Therefore, the mass in 2.25mol of Fe is 126g
Answer: 126g
Explanation:
No of moles = mass given/molar mass
No of moles given=2.25mol
Molar mass of Fe= 56
Mass =?
Substitute the values into the formula
No of moles = mass given/molar mass
2.25= mass/56
Mass= 56×2.25
Mass = 126g
Mass of Fe in 2.25mols is 126g
Which reasons explain why acids are added to foods? Check all that apply.
Food acids are added to make flavors "sharper", and also act as preservatives and antioxidants.
Acids are added to foods in order to preserving food as well as a food additives.
Why acids are added to foods?Acids are added for preserving food products as well as preventing bacteria growth and maintain quality of a product. there are a number of fruits and vegetables that have different types of acid.
So we can conclude that acids are added to foods in order to preserving food as well as a food additives.
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Which statements describe the inner planets?
Complete Question:
Which statements describe the inner planets? Select three options.
A. Uranus is one of the inner planets.
B. Mercury is one of the inner planets.
C. The inner planets are also called terrestrial planets.
D. The inner planets are larger than the outer planets.
E. Gases escaped from them during the planets’ formation.
Correct Option:
The statements which describe the inner planets are as follows:
B. Mercury is one of the inner planets.
C. The inner planets are also called terrestrial planets.
D. Gases escaped from them during the planets’ formation.
Explanation:
We have the smallest planet in the inner solar system - Mercury, Venus, Earth and Mars, which are so identified for being near to the Sun. A terrestrial planet, a telluric planet, or a rocky planet is a world made up predominantly of rocks of silicate or metal. The outer planets in the solar system are the nearest inner planets to the Earth.
The planets inside are smaller than the outer planets. When the fusion began on the Sun a huge seismic eruption would have originated from the Sun's core and erupted externally. It produced a concussion wave that washed away the inner planets' thick gaseous atmospheres, just like a candle flame bursts out of its wick when you unexpectedly blow.
What are the two main systems we use for describing acids and bases?
Which species is oxidized in the following reaction? N2O + H2 -> H2O + NH3
A) N+
B) H2
C) H+
D) N3
Answer:
B. H2
Hydrogen gas is the oxidized (reducing agent).
In the reaction N₂O + H₂ -> H₂O + NH₃, oxidation and reduction involve changes in oxidation states. Nitrogen in N₂O is ostensibly the species that gets oxidized. therefore the correct option is e.
To determine which species is oxidized in the reaction N₂O + H₂ -> H₂O + NH₃, we need to look at the changes in oxidation states of the elements involved. Oxidation involves an increase in oxidation state. In this reaction, nitrogen (N) goes from a lower oxidation state in N₂O to a higher one in NH₃, implying that hydrogen (H₂) is gaining electrons and being reduced, meaning the oxidized species must be N₂O. However, the options provided do not correctly match the elements or compounds in the reaction as written. The question might contain a typographical error since none of the options correctly identify nitrogen in the form of N₂O or NH₃. Typically, the oxidation state of hydrogen (H) is +1, and for nitrogen in NH₃, it's -3. Based on standard oxidation states, the closest correct answer, despite the mislabeled choices, would be nitrogen in some form because it's nitrogen's oxidation state that is changing in this context, not hydrogen's in a way that would indicate it's being oxidized. Without the correct options provided, addressing this question accurately is challenging.
The complete question is
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Which species is oxidized in the following reaction? N₂O + H₂ -> H₂O + NH₃
A) N+
B) H2
C) H+
D) N3
E) None of the above.
In the following reaction the oxidation state of phosphorus changes from ____ to ____? P4 + H2O + HNO3 -> H3PO4 + NO
A) +4, +5
B) 0, +6
C) O, +5
D) +5, +6
Answer:
C) 0, +5
Explanation:
P + H2O + HNO3 -> H3PO4 + NO
We consider all compounds that contain phosphorus in the equation
A substance that has no charge has a zero oxidation state
Hence at the reactant, phosphorus has an oxidation state of 0
Let us consider H3PO4 at the product side
Oxidation state of
H =+1×3=+3
O=-2×4=-8
P = ?
H3PO4 is a neutral compound and has 0 oxidation state
The sum of the individual oxidation states of each atoms in H3PO4 is equal to 0
Hence,
+3 + P + (-8) = 0
3+P-8=0
P=-3+8=+5
Hence the oxidation state of phosphorus in H3PO4 is +5
Therefore, the oxidation state of P in the reaction changed from
0 to +5
Phosphorus is said to have undergone oxidation
americium-241 has a half-life of 430 years. how much of a 10.0g sample of americium-241 remains after 1720 years?
Answer:
(a) What are the half-lives of these two isotopes? (b) Which one decays at a faster rate? (c) How much of a 1.00-mg sample of each isotope remains after 3 half- ...
Explanation:
Organisms can survive even. when in the wrong environment. (True/False)
Answer:
False
Explanation:
It is false. For example, if a shark stays on land, what will happen. It would end up dying because it needs water and its in a dry environment.
When particles that attract each other are allowed to come to together, energy is ______
Answer:
Released
Explanation:
When particles that attract each other come together, energy is usually released. The combination of the two particles is expected to result in a lower energy system. This lower energy system will be more stable than the different individual particles.
Hence, as this lower energy system is formed, the excess energy originally possessed by the particles is evolved hence energy is released when particles that attract each other are allowed to come together.
explain the effects of human activity on groundwater and surface water in a watershed
Explanation:
Human activities commonly affect the distribution, quantity, and chemical quality of water resources. The range in human activities that affect the interaction of ground water and surfa.ce water
The effects of human activity on groundwater and surface water in a watershe, Watersheds directly affect water quality, whether it's for drinking or recreation. For example, algae blooms from fertilizer runoff draining into water harm watershed health, as do mercury and lead seeping into the water supply due to pollution. ... The polluted water supply that results can become harmful to humans.
a result, most water becomes polluted by human activities. These include: throwing sewage and industrial waste into rivers and oceans, using harmful fertilizers, and even littering. All of these human activities affect our water sources. ... Water pollution affects the plants, animals, and soil around the river.
Human activities such as industrial waste discharge, use of pesticides and fertilizers, urban development, and excessive groundwater extraction have significant impacts on groundwater and surface water in watersheds. These activities result in water pollution, flooding, erosion, land subsidence, and reduced water supply.
Explanation:Human activities significantly impact both groundwater and surface water within a watershed. For example, industrial processes, agricultural practices, and urban development can all lead to the pollution of water sources. Industries often discharge waste into water bodies, which increases the chemical concentration affecting both groundwater and surface water. Additionally, the use of fertilizers and pesticides in agriculture seeps into the ground and contaminates groundwater, which eventually affects surface water as well.
Urban development affects watersheds by increasing impervious surfaces like pavement, reducing the land's ability to absorb water into the ground. This limits groundwater recharge and increases surface runoff, contributing to flooding and erosion.
Lastly, excessive groundwater extraction for agricultural, industrial, or domestic use can lower the water table in a process known as over-extraction. This has long-term consequences, including land subsidence and reduced water supply for future generations.
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Calculate the molar mass for HCN.
0.2703 g/mol
2.703 g/mol
27.03 g/mol
270.3 g/mol
Answer:
27.03 g/mol
Explanation:
Molar Mass of HCN
Mass of Hydrogen : 1.008
Mass of Carbon: 12.01
Mass of Nitrogen: 14.01
Molar Mass of HCN =
1.008 + 12.01 + 14.01=
27.03 g/mol
the air pressure for a certain tire is 113 KPa. What is the pressure I’m atmosphere
Answer: 1.11 atm
Explanation:
The unit of pressure include kilopascal (kPa), atmospheres (atm), mmHg etc
Now, given that:
Air pressure = 113 KPa
Convert kPa to atm
If 101.325 kPa = 1 atm
113 kPa = Z atm
To get the value of Z, cross multiply
Z atm x 101.325 kPa = 1 atm x 113 kPa
Z = ( 1 atm x 113 kPa) / 101.325 kPa
Z = 1.11 atm
Thus, the pressure is 1.11 atm
What type of reaction is shown? PbO2 --> PbO + O2 *
O
Synthesis
Decomposition
Cationic Single Replacement
ооооооо
O
Anionic Single Replacement
Double Replacement
O
combustion
O
Net lonic
Answer:
single replacement reaction.
Jillian made a model of an animal cell. She used a round
balloon to represent the cell membrane. She pushed
objects like marbles and rocks into the balloon to show cell
parts, then filled it with water to show fluid inside the cell.
Answer:
B. It does not show the functions of the cell parts
Explanation:
Cell models will always have some limitations. Here, the limitation is that Jillian did not include the functions of the cell parts, which can be confusing for someone on the outside who comes to take a look. So, the answer is B.
Choice A doesn't really make sense at all.
Obviously, the cell model is larger than a real animal cell, but that's the point of models - they are created to help scientists better understand and visualize very tiny things. Eliminate C.
This cell model is definitely not more complex than a real animal cell. If anything, it's more simplistic, so D is wrong.
Hope this helps!
Everything in the universe is
made up of what?
What is solubility?
A solution in which no more solute will dissolve
The amount of solute it takes to make a supersaturated solution.
The amount of solute that will dissolve in a given amount of solvent
The amount of solvent it takes to dissolve 100 g of solute
Answer:
C. The amount of solute that will dissolve in a given amount of solvent.
Explanation:
Solubility is the amount of solute that will dissolve in a given amount of solvent. Option 3 is correct.
A solution is a homogeneous mixture of two or more substances, where the substances are uniformly distributed throughout the mixture.
Solubility is defined as the amount of solute that will dissolve in a given amount of solvent at a specific temperature and pressure. It is usually expressed in terms of grams of solute per 100 grams of solvent, or in terms of the concentration of the solute in the solution.Therefore, the amount of solute that will dissolve in a given amount of solvent is referred to as solubility. The correct answer is option 3.
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3. A 4.3 L balloon us at 359 K. What Volume will the gas in the balloon occupy at 250 K?
Answer:
3.0 L
Explanation:
V1/V2 = T1/T2
4.3L / V2 = 359K/250K
V2 = (4.3*250)/359 ≈ 3.0 L
1. How many atoms are in 1 mole? How many molecules are in one mole? How many formula units are in
1 mole?
Answer:
One mole is equal to 6.02214179×1023 atoms, One mole contains 6.022 x 1023 molecules, 1 mol of an atom, molecule or formula unit contains 6.02 x 1023 atoms, molecules or formula units.
Explanation:
One mole of any substance contains 6.022\u00d71023 atoms, molecules, or formula units, known as Avogadro's number. Knowing the molecular formula is essential for determining the number of specific atoms in a mole of molecules. The molar mass is used to convert between the mass of a substance and the number of moles.
Explanation:Understanding the Mole Concept in Chemistry
One mole of a substance contains 6.022\u00d71023 atoms, molecules, or formula units. This number is known as Avogadro's number, and it applies regardless of the substance being an element or a compound. Therefore, there are exactly 6.022\u00d71023 atoms in 1 mole of an element, 6.022\u00d71023 molecules in 1 mole of a molecular compound, and 6.022\u00d71023 formula units in 1 mole of an ionic compound.
For instance, to calculate the number of moles of a specific atom within a molecule, the molecular formula of the substance must be known. Considering 5.6\u00d71022 molecules of MgF2, one molecule of magnesium fluoride (MgF2) contains 1 atom of magnesium (Mg) and 2 atoms of fluorine (F). Hence, the total number of atoms of fluorine in 5.6\u00d71022 molecules of MgF2 would be twice the number of molecules, which is 1.12\u00d71023 atoms of fluorine.
In stoichiometric calculations, knowing molar mass is crucial as it links the mass of a substance (that can be measured on an analytical balance) to the amount of substance in moles. By using the formula of a compound and its molar mass, we can convert between grams and moles, and through Avogadro's number, relate moles to the number of atoms or molecules.