AnswersSY2026-27 - 2003340 Chemistry 1 Sem 2 CRWriting and Balancing Chemical Equations

Molar Masses Answers

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1
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What is the molar mass of CHCl3?

A
48.47 g/mol
B
83.92 g/mol
C
119.37 g/mol
D
121.39 g/mol
2
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Which is the molar mass of BF3?

A
10.81 g/mol
B
29.81 g/mol
C
48.81 g/mol
D
67.81 g/mol
3

Which value gives the number of particles in 1 mol of a substance?

A
6.02 1021
Option A
B
6.02 1022
Option B
C
6.02 1023
Option C
D
6.02 1024
Option D
4

How does the number of molecules in 1 mol of oxygen compare with the number of molecules in 1 mol of nitrogen?

A
1 mol of oxygen has fewer molecules.
B
1 mol of oxygen has more molecules.
C
Each sample has the same number of molecules.
D
The molecules cannot be compared without knowing the mass.
5

What is the molar mass of Al2(SO4)3?

A
150.03 g/mol
B
278.03 g/mol
C
342.17 g/mol
D
450.09 g/mol
6

Magnesium and iron are metallic elements. How does a mole of magnesium compare with a mole of iron?

A
A mole of iron has more atoms.
B
They both have the same mass.
C
A mole of magnesium has more mass.
D
They both have the same number of atoms.
7

Which is the formula mass of (NH4)2SO4?

A
96.07 amu
B
114.12 amu
C
116.17 amu
D
132.17 amu
8

How are a mole and a dozen similar?

A
Each represents a certain mass of material.
B
Each names a given number of objects.
C
Each identifies a specific volume.
D
Each measures a given number of amus.
9

What is Avogadro’s number?

A
the number of atoms in exactly 14.00 g of carbon-12
B
the number of atoms in a kilogram of any substance
C
the number of atoms, molecules, ions, formula units, or other particles in a mole of a substance
D
the number of atoms, molecules, ions, formula units, or other particles in a gram of a substance
10

Consider the equation below.Na+ + Cl– NaClWhich statement best describes the relationship between the substances in the equation?

Question illustration
A
The number of sodium ions is equal to the number of formula units of salt.
B
The number of sodium ions is less than the number of chloride ions.
C
The number of chloride ions is less than the number of formula units of salt.
D
The number of sodium ions is two times the number of formula units of salt.

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Molar Masses

Molar Masses Answers — SY2026-27 - 2003340…