What measurements must you make to find the density of a sample of matter

Answers

Answer 1

Answer: you would have to look for the mass of the sample and the volume of the sample.

Related Questions

Given the equation representing a closed system:N2O4(g) <=> 2NO2(g)Which statement describes this system at equilibrium?(1) The volume of the NO2(g) is greater than the volume of the N2O4(g)(2) The volume of the NO2(g) is less than the volume of the N2O4(g)(3) The rate of the forward reaction and the rate of the reverse reaction are equal(4) The rate of the forward reaction and the rate of the reverse reaction are unequal
Which of the following substance is not an acid? 1. Substance A is tested and found to have a pH of 3. 2. Substance B, a common food, tastes sour. 3. Substance C causes metals to corrode. 4. Substance D feels slippery in solution.
Calvin pushes a lawnmower 20 meters with a force of 2 N. How much work has he done?none 20 Nm 22 Nm 40 Nm
What is the final concentration of a solution prepared by diluting 35.0 ml of 12.0 m hcl to a final volume of 1.20 l? what is the final concentration of a solution prepared by diluting 35.0 ml of 12.0 m hcl to a final volume of 1.20 l?
What is the SI base unit for time?

Which of the following general statements about Earth's atmosphere is not true? a.Atmospheric scattering of light explains why our daytime sky is bright and blue.
b.The nitrogen and oxygen in Earth's atmosphere keep the surface pleasantly warm.
c.Even in low-Earth orbit, some atmospheric gas is still present.
d.Atmospheric pressure decreases with altitude.

Answers

Answer:

b.The nitrogen and oxygen in Earth's atmosphere keep the surface pleasantly warm.

Explanation:

Hello,

Based on the behavior of the Earth's atmosphere, it is widely known that the surface temperature depends on the altitude since the Earth's nucleus has the capacity to warm the outer surface as it is closer to it. In such a way, the warmness of the surface depends on the nucleus rather than the presence of nitrogen and oxygen.

Best regards.

Final answer:

Among the provided options, the statement falsely attributing the Earth's warmth to nitrogen and oxygen in the atmosphere is incorrect. It is the greenhouse gases that keep Earth's surface warm, not nitrogen and oxygen.

Explanation:

The statement that is not true among the options provided is option b. The nitrogen and oxygen in Earth's atmosphere do not keep the Earth's surface pleasantly warm. It's the greenhouse gases in the atmosphere, which include gases like carbon dioxide and methane, that trap heat from the Sun and keep the Earth's surface warm. Nitrogen and oxygen, which make up the majority of the Earth's atmosphere, do not have this property.

Other statements are correct. Scattering of light by the Earth's atmosphere does cause the blue colour of the sky (a), atmospheric gas is still present even in low-Earth orbit (c), and atmospheric pressure indeed decreases with altitude (d).

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Which statement defines calorimetry ?

Answers

Calorimetry is the measurement of the amount of heat exchanged in a system. It is a science in determining the changes in the energy of specific system. The equipment used for this is called a calorimeter.

The field of physics known as calorimetry determines how much heat is transferred during a chemical or physical process.

It requires precisely calculating the heat transport in a system using a calorimeter, a specialist tool. Two substances coming into contact at differing temperatures normally causes heat exchange to occur until thermal equilibrium is attained. The amount of heat transported can be determined by monitoring the temperature change and taking into account the individual heat capacity of the substances involved. Calorimetry has many uses, including figuring out how much energy is in food, researching chemical processes, and looking at the thermal characteristics of various materials. It is necessary to comprehend how energy is transformed in distinct systems.

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Which of the radioactive emissions has the highest energy? A. Beta B. Gamma C. Alpha (thank you so much )

Answers

B Gamma hope im helping

I think it is B. Gamma, cause it made the Hulk. That is not my only reason though.

The following reactions ar an example of what kind of reaction?ZnBr2(aq) + 2AgNO3(aq) -> Zn(NO3)2(aq) + 2AgBr(s)
a) precipitation reaction
b) acid=base reaction
c) oxidation-reduction reaction

Answers

Answer: A) precipitation reaction

Explanation: In the products of the reaction, AgBr is a solid. Since the starting reagents were both aqueous, this is indicative of a precipitation reaction.

Choice B is wrong because both the starting materials and the final products are inorganic salts, not acids and bases. Choice C is wrong because the oxidation numbers for Zn, Br, Ag, and the NO3 anion didn't change in the reaction.

Final answer:

The given reaction, ZnBr2(aq) + 2AgNO3(aq) -> Zn(NO3)2(aq) + 2AgBr(s), is an example of a precipitation reaction.

Explanation:

The given reaction, ZnBr2(aq) + 2AgNO3(aq) -> Zn(NO3)2(aq) + 2AgBr(s), involves the combination of aqueous solutions of ZnBr2 and AgNO3. The products formed are Zn(NO3)2, which remains in the aqueous state, and AgBr, which precipitates as a solid.

This reaction is an example of a precipitation reaction. In a precipitation reaction, two aqueous solutions react to form an insoluble solid called a precipitate. In this case, the silver ions (Ag+) from AgNO3 react with the bromide ions (Br-) from ZnBr2 to form AgBr, which is insoluble in water and appears as a solid.

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Which physical change is endothermic?(1) CO2(s)-->CO2(g) (3) CO2(g)-->CO2(l)
(2) CO2(l)-->CO2(s) (4) CO2(g)-->CO2(s)

Answers

Answer: The correct option is 1.

Explanation:Endothermic reactions are the reactions in which heat is provided to break down the reactant molecules.

In option 1:

The stronger intermolecular forces between the particles in solid molecule are broken down to convert into gaseous form. Hence, some energy in the form of heat is provided to move them far apart. Therefore, it is considered as an endothermic reaction.

In option 2, 3 and 4:

All the other processes involves the formation of bonds and thus there is no need to provide any energy.

The physical change that is endothermic is $\boxed{\left( 1 \right){\text{ C}}{{\text{O}}_{\text{2}}}\left( s \right) \to {\text{C}}{{\text{O}}_{\text{2}}}\left( g \right)}$ .

Further explanation:

Changes are of two types:

(A) Physical changes:

It is the process in which the physical properties of the system are affected. These changes can also be reversed by physical methods. In these kinds of changes, the molecular composition of the substance remains the same. These are reversible in nature and no new substances are formed. For example, boiling of water, chopping of wood, melting of wax are physical changes.

(B) Chemical changes:

In this change, new substances are formed by the chemical combination of the previous substances. The chemical properties of substance changes when it undergoes a chemical change. These are irreversible in nature. For example, fermentation of grapes, burning of wood, rusting of iron are chemical changes.

Endothermic reactions are those in which more energy needs to be supplied to the system than that released by it.

Exothermic reactions are those in which more energy is released by the system than that supplied to it.

(1) ${\text{C}}{{\text{O}}_{\text{2}}}\left( s \right) \to {\text{C}}{{\text{O}}_{\text{2}}}\left( g \right)$

In this reaction, solid carbon dioxide is converted into gaseous carbon dioxide. The strong intermolecular force of attraction in solid needs to be broken down and energy is supplied for this purpose. Hence this is an endothermic process.

(2) ${\text{C}}{{\text{O}}_{\text{2}}}\left( l \right) \to {\text{C}}{{\text{O}}_{\text{2}}}\left( s \right)$

In this reaction, liquid carbon dioxide is converted into solid carbon dioxide. The intermolecular forces in liquid molecules are weaker than that present in solid molecules and are broken down easily so energy is released during the process. Hence this is an exothermic process.

(3) ${\text{C}}{{\text{O}}_{\text{2}}}\left( g \right) \to {\text{C}}{{\text{O}}_{\text{2}}}\left( l \right)$

In this reaction, gaseous carbon dioxide is converted into liquid carbon dioxide. The intermolecular forces in gas molecules are weaker than that present in liquid molecules and are broken down easily so energy is released during the process. Hence this is an exothermic process.

(4) ${\text{C}}{{\text{O}}_{\text{2}}}\left( g \right) \to {\text{C}}{{\text{O}}_{\text{2}}}\left( s \right)$

In this reaction, gaseous carbon dioxide is converted into solid carbon dioxide. The intermolecular forces in gas molecules are weaker than that present in solid molecules and are broken down easily so energy is released during the process. Hence this is an exothermic process.

Learn more:

1. Which of these is an extensive property? brainly.com/question/1398514

2. Which of the phase changes is an exothermic change? brainly.com/question/1875234

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Physical and chemical changes

Keywords: physical change, chemical change, CO2, endothermic, exothermic, solid, liquid, gaseous, intermolecular forces, strong, weaker.

Which chemical equation describes an acid-base neutralization reaction?

Answers

HCL+NAOH=NACL+H2O
HCL=ACID
NAOH=Base
NACL=SALT
H2O=Wate

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