Answer:
the sodium nitrate in this investigation is
a) the solute
b) undergoing chemical change
Explanation:generally, solute is the substance which is added in solvent.
The substance which is taken in relatively more volume is the solvent.
so, here sodium nitrate (NaNO₃) is the solute which is dissolved in water (H₂O) , which is solvent.
The reaction between them is :
NaNO₃ + H₂O ⇒ Na⁺ (aq) + NO₃⁻ (aq) ; (aq) denotes aqueous;
so, here sodium nitrate undergoes chemical change into aqueous sodium ions(Na⁺) and aqueous nitrate ions(NO₃⁻).
What is the mass of 6.02 x 10^23 molecules of nitrogen gas, N2?
Answer:
1.69×10^25 grams
Explanation:
First convert molecules to moles and then convert moles to grams by multiplying by the molar mass which is 28.0g and you get this answer!!
Hope this is right
The amount of space that something occupies or contains is__________.
a. volume
b. density
c. state
Answer:
a
Explanation:
Volume
Take a look at the guidewords listed below. If you wanted to look up the word curiosity, from “Rikki-Tikki-Tavi,” in a dictionary, on which page would you search coupon – cousin cow – coyote cure – current curricular – cushion
Answer:
the answer is current curricular
Answer:
current curricular
Explanation:
Which substance is a mixture?
table salt
gasoline
aluminum
carbon dioxide
Answer: gasoline
Explanation: Gasoline is a mixture of many different hydrocarbons: alkanes (paraffins), cycloalkanes and alkenes (olefins). Salt and carbon dioxide are chemical compounds, aluminium (Al) is an chemical element.
Taking into account the definition of mixture, the correct answer is second option: gasoline.
A mixture is the combination or union of two or more elements or components that can be found in any state of matter.
Mixtures can be homogeneous, where the components are united in a uniform way and are not distinguished by the naked eye, or heterogeneous, which lacks uniformity, so that the substances or elements that make up the mixture can be distinguished.
Gasoline is a combination of several liquid, volatile and flammable hydrocarbons, that is, organic compounds formed only by carbon and hydrogen, obtained by fractional distillation of petroleum to which additives are added to improve its properties.
In others words, gasoline is a homogeneous mixture of hydrocarbons which are obtained from oil.
In summary, the correct answer is second option: gasoline.
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A polar covalent bond is likely to form between two atoms that
a. are similar in electronegativity
b. are of similar size
c. differ in electronegativity
Answer:
c. differ in electronegativity
Explanation:
Covalent bond:
It is formed by the sharing of electron pair between bonded atoms.
The atom with larger electronegativity attract the electron pair more towards it self and becomes partial negative while the other atom becomes partial positive.
For example:
In water the electronegativity of oxygen is 3.44 and hydrogen is 2.2. That's why electron pair attracted more towards oxygen, thus oxygen becomes partial negative and hydrogen becomes partial positive . The bond is polar.
When the elctronegativity difference is 0.4 or less than 0.4 the bond is non polar.
if the electronegativity difference is greater than 0.4 the bond is polar.
A polar covalent bond is likely to form between two atoms that differ in electronegativity, resulting in an unequal sharing of electrons and a molecule with a partial negative and positive charge.
Explanation:A polar covalent bond is likely to form between two atoms that c. differ in electronegativity. This is because, in a polar covalent bond, one atom has a greater attraction for the electrons than the other atom. If the relative attraction, or electronegativity, of an atom for electrons is significant enough to create an unequal sharing of electrons, the result is a polar covalent bond with one end of the bond having a slight negative charge and the other end having a slight positive charge.
For example, in a water molecule, the oxygen atom is more electronegative than the hydrogen atoms, resulting in a polar covalent bond where the shared electrons spend more time closer to the oxygen nucleus, giving it a slightly negative charge and leaving the hydrogen atoms with a slightly positive charge.
6. Identify the type of reaction shown by this chemical equation:
2A1 + Cl2 → 2AICI
Answer:
Synthesis
Explanation:
Synthesis reaction:
It is the reaction in which two or more simple substance react to give one or more complex product.
General equation;
A + B → AB
The given reaction is synthesis reaction.
Chemical equation:
2Al + Cl₂ → 2AlCl
it is also redox reaction because oxidation reduction take place.
The oxidation state of aluminium and chlorine is zero on left side while it on right side aluminium become cation with charge of +1 and chlorine become anion with a charge of -1.
Aluminium is reducing agent while chlorine is oxidizing agent.
Oxidizing agents:
Oxidizing agents oxidize the other elements and itself gets reduced.
Reducing agents:
Reducing agents reduced the other element are it self gets oxidized.
How much would the boiling point of water increase if 4 mol of NaCl were
added to 1 kg of water (Kb = 0.51°C/(mol/kg) for water and i = 2 for NaCl)?
Answer:
4.08
Explanation:
Answer:
4.08
Explanation:
a . p . e . x .
If it takes 100 N to move a box 5 meters, what is the work done on the box?
500 Joules
Explanation:We are given;
Force is 100 NDistance is 5 mWe are required to calculate the work done;
Work done is the product of force and distance.That is, work done = Force × distance Work is measured in JoulesThus, in this case;
Work done = 100 N × 5 m
= 500 Joules
Thus, the work done in moving the box is 500 joules
The number of molecular collisions increases when
Which of the following could be considered a benefit of modern farming
techniques?
O
A. Food is produced more slowly than it used to be.
O
B. More land is available for the construction of industrial buildings
and neighborhoods.
O
C. The food we eat is fresher because it is treated with preservatives.
O
D. Pesticides have improved the environment.
Answer:
C. The food we eat is fresher because it is treated with preservatives
Answer:
Option-(B,C): Due, to having more advanced or modern farming techniques there is more land available for the construction of industrial buildings and neighborhoods. While, the food we eat is fresher because it is treated with preservatives.
Explanation:
The modern farming techniques has provided with great benefits, as there is more space for building new structures and develop the industrial zones more frequently. As, there is now much space to have industries in the region,while the farms are much advanced these days. Along with that, the food is able to eaten after longer duration of time and is able to be supplied to much far distances across the borders to other countries or regions. Just because the food we eat is fresher because it is treated with preservatives.As, there are some modern techniques which has able us to preserve the food through any long season.
Which of these is NOT a cause of the heat inside Earth?
A.) Volcanoes
B.) radioactive decay
C.) gravitational contraction
D.) bombardment by asteroids
Answer:
Bombardment by asteroids
Explanation:
All of the other ones explain themselves
When a liquid becomes a gas, the process is called_______.
a. condensation
b. diffusion
c. evaporation
The correct answer is C: Evaporation.
Further Explanation:
Liquids that become a gas goes through a process called evaporation. Evaporation occurs when something that is liquid heats up enough to become a gas form. The liquid is heated so quickly that the molecules in the liquid evaporate.
Condensation is the opposite of evaporation and this turns the gas into a liquid.
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31) The mass of an electron is approximately 1/1836
times the mass of
A) 1/1H
B) 2/1H
c) 3/1H
D) 4/2He
Answer:
[tex](_{1} ^ {1}\textrm{H})[/tex] is the correct choice that is option A.
Explanation:
An electron has [tex]\frac{1}{1836}[/tex] times the mass of a proton, but an equal and opposite negative charge.
Lets [tex]_{A}^{Z}\textrm{X}[/tex] is any element represented here.
Where [tex]Z[/tex] is the number of protons as well as its atomic number.
And
[tex]A[/tex] is the mass number which is the number of protons and neutrons in any atom.
Note: We know that Hydrogen [tex](_{1} ^ {1}\textrm{H})[/tex] is devoid of neutron,so number of neutrons in a Hydrogen atom is zero.
Then
[tex](_{1} ^ {1}\textrm{H})[/tex] is also a representation of single proton.
So [tex](_{1} ^ {1}\textrm{H})[/tex] is the right choice that is option A.
The mass of an electron is approximately 1/1836 times the mass of a proton.
Explanation:The mass of an electron is approximately 1/1836 times the mass of a proton (choice B). This means that the mass of the electron is much smaller compared to the mass of the proton. For example, in a hydrogen atom, which consists of just one proton and one electron, the mass of the proton is about 1836 times greater than the mass of the electron.
Photons are not considered as objects in the traditional sense, as they cannot exist in a
stationary state.
a. True
b. False
Answer: True
Explanation:
Photons do not have mass, so they are not considered matter. However, they do have a stationary state either, so they are not considered an object in Physics.
A speaker conntected to an MP3 player converts electrical energy into sound energy.according to the law of conversation of energy energy is? A)distroyed when operating b)created when operating c) neither created nor distroyed when operating d) created and then distroyed as the system operate
Answer:
c
Explanation:
The law of conservation clearly states that energy can neither be created nor destroyed
Metal atoms will most likely form ions by the 1 loss of protons. 2 loss of electrons. 3 gain of electrons. 4 gain of protons.
Answer:
2 loss of electrons.
Explanation:
An atom of any element either metal or nonmetal form ions by losing or gaining electron. This is because protons are embedded in the nucleus with neutrons and electrons are found in different orbits surround the nucleus.
Metals have 1 or 2 or 3 electrons in their outermost shell which is called valence shell and electrons in these shell is called valence electron.So they lose electrons to form ions.Metals lose electrons and positively charged ions called cations.
Whereas nonmetals have 5 or 6 or 7 electrons in their outermost shell so they gain electrons to form ions.
For example Aluminium is a metal having electronic configuration (2,8,3). That means aluminium have 3 electrons in its valance shell so it loses its electrons to become a positively charged ion.
Another one is Sodium a metal having electronic configuration (2,8,1). That means aluminium have 1 electrons in its valance shell so it loses its electrons to become a positively charged ion.
Metal atoms are most likely to form ions by losing electrons, which makes them cations. This process helps achieve a more stable electron configuration by having the same number of electrons as the previous noble gas.
Explanation:Metals atoms are likely to form ions by losing electrons, so the correct answer is 2: loss of electrons. When metals lose electrons, they become cations, which are positively charged ions. This allows them to achieve a more stable electron configuration by having the same number of electrons as the previous noble gas. For example, a calcium atom loses two electrons and becomes a calcium ion with a 2+ charge.
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Identify the type of atom that generally forms covalent bonds.
Answer:
non-metal
Explanation:
Covalent bonds are formed when non-metal atoms are combined.
In the periodic table, that's groups 3A, 4A, 5A, 6A and 7A, all to the right of the "staircase" line.
write the equation for the combined gas law using temperature in degree Celsius. explain why the Kelvin scale is convenient
Answer:
[tex]\frac{PV}{T}=k[/tex]
Explanation:
Combine Gas law is a combination of three gas laws which are Boyle's Law, Charles' Law, and Gay-Lussac's Law.
Combine gas law states that the ratio of the product of pressure and volume and the absolute temperature of a gas is equal to a constant.
Hence the equation becomes:
[tex]\frac{PV}{T}=k[/tex]
where P = pressure,
V = volume,
T = absolute temperature,
k = constant.
Now we know that Kelvin = °Celsius + 273
For all gas law problems it is necessary to work in the Kelvin scale because temperature is in the denominator in the combined gas laws (P/T, V/T and PV/T) and can be derived in the ideal gas law to the denominator (PV/RT) . If we measured temperature in Celsius we could have a value of zero degrees Celsius and this would solve as no solution, as you cannot have zero in the denominator.
However, if we reached zero in the Kelvin scale this would be absolute zero and all matter would stop and therefore there would be no gas laws to worry about.
3.88 x 10^-6 mol/ g*cm^2 = mol/ kg*m^2
To convert the units of concentration from mol/g*cm² to mol/kg*m², one should convert grams to kilograms and cm² to m² using known conversion factors. After the conversions, the units will be successfully changed to mol/kg*m².
Explanation:The question provided is about the conversion of units of concentration from mol/g*cm² to mol/kg*m². This is a common type of problem in chemistry when dealing with different units of concentration. The conversion will involve changing the unit of mass from grams to kilograms, and changing the unit of area from cm² to m².
To convert grams to kilograms, we need to know that 1 kg is equal to 1,000 g. Therefore, we multiply our value in g by (1 kg/1,000 g).
To convert cm² to m², we know that 1 m is equal to 100 cm, and therefore 1 m² is equal to 10,000 cm². So, we multiply our value in cm² by (1 m²/10,000 cm²).
After doing these calculations, we will have successfully converted the given concentration from mol/g*cm² to mol/kg*m².
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What are the differences between metals, nonmetals, and metal looks in the periodic table?
Answer:
Metals ionize by electron gain, non-metals ionize by electron loss while metalloids possess properties of both metals and non-metals
Explanation:
why is the venus flytrap different from most other green plants
Answer:
The Venus flytrap consumes its food in the form of flies and other small insects not through the roots as other plants
Explanation:
Answer:
The thing about the venus fly trap which makes it so unique and are known for is its ability to digest insects.
Explanation:
The thing about the venus fly trap which makes it so unique and are known for is its ability to digest insects. In its name "fly trap" which are commonly house plants implies the ability of trapping insects for its nutrional value
5. RELATING IDEAS Carbon and oxygen react to form
carbon monoxide: 2C+02-→ 2CO. What mass-
es of carbon and oxygen are needed to make
56.0 g CO? Which law does this illustrate?
5. It is one of the most important greenhouse gases linked to global warming, but it is a minor component of Earth’s atmosphere (about 3 volumes in 10,000), formed in combustion of carbon-containing materials, in fermentation, and in respiration of animals and employed by plants in the photosynthesis of carbohydrates.
(ᵔᴥᵔ)Hope It Helpsʕ·ᴥ·ʔThe mass of oxygen and carbon required to produce 56 grams CO has been 32 grams and 24 grams respectively. The law that illustrates this has been the law of conservation.
The moles of product or reactant in a chemical reaction are given by the stoichiometric coefficient of the balanced chemical equation.
The given balanced equation has been:
[tex]\rm 2\;C\;+\;O_2\;\rightarrow\;2\;CO[/tex]
From the balanced chemical equation, for the formation of 2 moles of CO,1 mole of oxygen and 2 moles of carbon has been required.
56 g of CO has been equivalent as:
[tex]\rm Moles=\dfrac{Mass}{Molar\;mass} \\\\Moles\;CO=\dfrac{56}{28}\;mol\\\\ Moles\;CO=2\;moles[/tex]
The moles of CO produced has been 2 moles. Thus, the moles of oxygen and carbon required are:
The mass of oxygen required is 32 grams.
Carbon required is 2 moles.The mass of carbon required has been 24 grams.
The law that illustrates this is the law of conservation. According to the law of conservation, mass has not been lost in the chemical reaction.
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During a light storm, what can cause the ground to become positively charged?
Answer:
The charge in the clouds can cause the ground to become positively charged.
Explanation:
During a thunderstorm, the important charging area is the central part or portion of the storm when air is moving in an upward direction. The temperature here ranges from -15 to -25 degree Celsius. The ground has a slightly negative charge and when a thunderstorm comes the negative charge on the ground is repelled by the negative charge in the center of the storm. This makes the ground that is underneath the storm to become more positively charged.
1.) Describe two ways that an ion forms from an atom. (Hint: loss of electrons= cation, gain of electrons=anion)
2.)Describe the difference between an ionic and a covalent bond.
Atoms form ions by gaining or losing electrons. A cation forms when an atom loses electrons, while an anion forms when an atom gains electrons. An ionic bond is formed between oppositely charged ions, while a covalent bond is formed by the sharing of electrons between atoms.
Explanation:Ions are formed when atoms gain or lose electrons. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. An example of a cation is sodium (Na+), which loses one electron to form a positive ion. An example of an anion is chloride (Cl-), which gains one electron to form a negative ion.
Difference between ionic and covalent bonds:
An ionic bond is formed by the attraction between a positive ion (cation) and a negative ion (anion). These ions are held together due to the opposite charges, similar to how oppositely charged magnets stick together. A covalent bond is formed when electrons are shared between two atoms. Each atom shares one of their electrons, which then orbits the nuclei of both atoms. Covalent bonds are typically formed between nonmetal atoms.
what is precision in chemistry
Explanation:
In chemistry, accuracy refers to how close a measurement is to its standard or known value. ... Precision refers to how close two or more measurements are to each other, regardless of whether those measurements are accurate or not. It is possible for measurements to be precise but not accurate.
In chemistry, precision is the consistency of repeated measurements under unchanged conditions, reflecting the reliability of data. Precise measurements are critical for reproducibility and may inform on the purity of substances, illustrating a substance's homogeneous nature.
Explanation:In chemistry, precision refers to how closely a measurement matches the same measurement when it is repeated under unchanged conditions. It is an indication of the consistency among a set of results. Precision is essential in chemistry because it ensures that experiments and measurements can be reproduced, which is a fundamental aspect of the scientific method. The precision of a measuring tool is also dependent on the size of its measurement increments; smaller increments generally allow for more precise measurements.
When considering both accuracy and precision, a set of measurements can be precise without being accurate and vice versa. For example, if a series of measurements are close to each other but far from the known or accepted value, they are precise but not accurate. Conversely, a single measurement can be accurate if it is close to the known value, even if it is not repeated to assess precision.
The concepts of precision and purity are also related in chemistry. A pure substance is a homogeneous substance that has a constant composition. Having precise measurements helps chemists in determining the purity of substances, as consistent properties and measurements suggest that a substance is pure and not contaminated with other materials.
What are the products???
Potassium Chloride + Sodium ->
Potassium Chloride and sodium chloride is a combination ofmineral supplement that may be helpful in heart prostration
Choose the products that complete the reaction. The chemical equation may not be balanced.
HC2H302 + Ca(OH)2 = ?
Ca(C2H302)2 + H20
© Ca(C2H302)2 + CO2+ H20
Ca(C2H302)2 + H2
W
In a reaction between acetic acid (HC2H3O2) and calcium hydroxide (Ca(OH)2), the products are calcium acetate (Ca(C2H3O2)2) and water (H2O). This is a neutralization reaction resulting in the formation of a salt and water.
Explanation:The reaction between acetic acid (HC2H3O2) and calcium hydroxide (Ca(OH)2) is an example of a neutralization reaction where an acid reacts with a base. In this case, acetic acid and calcium hydroxide react to form calcium acetate (Ca(C2H3O2)2) and water (H2O), which are the products of the reaction. This type of reaction involves the swap of cations and anions between the acid and the base to form the new products: water and a salt (calcium acetate in this case).
Once balanced, the chemical equation should look like this:
2 HC2H3O2(aq) + Ca(OH)2(aq) → Ca(C2H3O2)2(aq) + 2 H2O(l)
Answer:
A or first one
Explanation:
trust meeeeeee
Look at the diagram to below. In which direction would the object move?
to the left
to the right
straight up
Answer:
The object will move to the right .
Explanation:
The force in the right side of the object is 20N which is more than the force of any other side according to the given question.
As the force in the right side of the object is greater than that of other sides the the object will move to the right.
genetically-identical individuals
Answer:
twins
Explanation:
twins are genetically identical
Part A
What volume of 0.210 M K S solution is required to completely react with 175 mL of 0.140 M CO(NO3),?
117 mL of 0.210 M K₂S solution
Explanation:
The question asks about the volume of 0.210 M K₂S (potassium sulfide) solution required to completely react with 175 mL of 0.140 M Co(NO₃)₂ (cobalt(II) nitrate).
We have the chemical reaction:
K₂S + Co(NO₃)₂ → CoS + 2 KNO₃
molar concentration = number of moles / volume (L)
number of moles = molar concentration × volume
number of moles of Co(NO₃)₂ = 0.140 × 175 = 24.5 mmoles
We see from the chemical reaction that 1 mmole of Co(NO₃)₂ is reacting with 1 mmole of K₂S, so 24.5 mmoles of Co(NO₃)₂ are reacting with 24.5 mmoles of K₂S.
volume = number of moles / molar concentration
volume of K₂S solution = 24.5 / 0.210 = 117 mL
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