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Eddi Din [679]
4 years ago
11

If two objects have the same mass, what must be true? choose the correct answer A. They have the same volume B. They are made of

the same material C. they contain the same amount of matter D. They have the same density
Chemistry
2 answers:
Nataly_w [17]4 years ago
7 0
C. Mass is kind of like a measurement of matter.
ankoles [38]4 years ago
3 0

Answer: Option (C) is the correct.

Explanation:

Density is known as the amount of substance present in a liter.

Mathematically,     Density = \frac{mass}{volume}

Therefore, it means density is directly proportional to mass of a substance and inversely proportional to the volume of the substance.

Hence, density depends on both the factors, that is, mass and volume.

Whereas mass present in a substance means the amount of matter present in it.

Hence, we can conclude that if two objects have the same mass, then it is true that they contain the same amount of matter.

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Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 ∘C, the vapor pressure of pure be
Kisachek [45]

Answer:

P_{solution} = 85.3Torr

Explanation:

Raoult's law is a tool that allows to determine vapour pressure of solutions. The formula is:

P_{solution} = X_{solvent}P_{solvent} <em>(1)</em>

Where

P is Pressure of solution and solvent and X is mole fraction.

Moles of solute and solvent are:

Biphenyl:

11.5g×(1mol /154.21g) = <em>0.0746mol</em>

Benzene

31.9g×(1mol /78.11g) = <em>0.408mol</em>

Mole fraction of benzene is:

\frac{0.408mol}{0.408mol + 0.0746mol} = <em>0.846</em>

Replacing in (1):

P_{solution} = 0.846*100.84Torr

P_{solution} = 85.3Torr

I hope it helps!

3 0
3 years ago
Define ionization energy and explain why the second aisle and ionization energy of the element is higher than its ionization ene
seraphim [82]

Define ionization energy and explain why the second aisle and ionization energy of the element is higher than its ionization energy

The energy needed to remove one or more electrons from a neutral atom to form a positively charged ion is a physical property that influences the chemical behavior of the atom. By definition, the first ionization energy of an element is the energy needed to remove the outermost, or highest energy, electron from a neutral atom in the gas phase.

The process by which the first ionization energy of hydrogen is measured would be represented by the following equation.

H(g) -----> H+(g) + e-     deltaHo = -1312.0 kJ/mol


6 0
3 years ago
What kind of solid is crystalline boron
Ulleksa [173]

Answer:

It is a network solid, a lattice of many covalent bonds (like diamond, except that it is black rather than transparent).

Explanation:

7 0
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The germ theory of disease eventually led to the development of _______.
a_sh-v [17]

The germ theory of disease eventually led to the development of certain types of vaccines. This theory explains that specific type or types of microorganisms, which are bacteria, virus, fungi, or protest species, cause some diseases. These organisms can enter the human body, and can even grow and reproduce, causing infection, inflammation to specific organs in the body, and others. One particular vaccine developed successfully through this understanding is the smallpox vaccine, which is an important vaccine up to this day.




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6CO2 + 6H2O → C6H12O6 + 6O2.
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