Free Printable Moles and Molar Mass

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Moles and Molar Mass

Total questions: 32

Worksheet time: 1hrs 14mins

Name

Class

Date

What is the definition of molar mass?

number of grams per one mole of a substance

whole number ratio that is a multiple of a chemical formula

simplest, whole number ratio of a chemical formula

6.02 x 10^23 particles per one mole of a substance

What is the molar mass of AuCl₃?

96 g

130 g

232.5 g

303.3 g

What is the definition for Avogadro's number?

number of grams per one mole of a substance

whole number ratio that is a multiple of a chemical formula

simplest, whole number ratio of a chemical formula

6.02 x 10^23 particles per one mole of a substance

How many moles are present in 32.3 grams of carbon dioxide (CO₂)?

44.01 moles

1421.52 moles

32.3 moles

0.73 moles

What is the mass in grams of 5.90 mol C₈H_18?

.0512 g

19.4 g

673 g

389 g

What is the mass of 2.50 mol of oxygen gas O₂?

40 g

80 g

16 g

32 g

How many water molecules are in 5.2 moles of water?

6.02 x 10²³

5.2

3.1304 x 10²⁴

8.638 x 10^-24

How many grams are in 2.4mol of sulfur?

0.075g

77g

6.2x10²g

How many grams are in 11.9mol of chromium?

0.229g

4.37g

618g

619g

10.

What is the molar mass of Mn₂Se₇?

542.50 g/mol

601.34 g/mol

662.60 g/mol

11.

How many moles are in 98.3 g of aluminium hydroxide?

0.794 mol

1.26 mol

2.23 mol

7.67x10³ mol

12.

How many grams are in 2.3x10^-4 mol of calcium phosphate?

0.031 g

0.071 g

0.084 g

5.9x10⁵ g

13.

How many atoms are found in 1 mol of Xenon atoms?

6.022x10²³

3.011x10²³

1.204x10²⁴

6.022x10²⁴

14.

How many representative particles are found in 1.23 mol of Polonium.

2.41x10²⁴

7.53x10²³

6.02x10²³

1.20x10²⁴

15.

What is the molar mass of sodium?

11 g/mol

23 g/mol

45.98 g/mol

3 g/mol

16.

What is the mole used for?

To measure the amount of grams in a substance

To measure the amount of atoms or molecules in a substance

To measure the amount of energy in a substance

To measure the amount of bonding in a substance

17.

The molar mass of an element is equal to its...

Atomic mass (from the periodic table)

Atomic number (from the periodic table)

Oxidation number

Valence electrons

18.

The molar mass of calcium is 40.08 g/mol. This means that 1 mole of calcium has a mass of:

4.008 grams

40.08 grams

20 grams

20.04 grams

19.

What is the molar mass of cyanide (CN-).

13 g/mol

24.02 g/mol

26.02 g/mol

42.02 g/mol

20.

What is the molar mass of B₂(CO₃)₃?

81.632 g/mol

94.842 g/mol

38.822 g/mol

201.648 g/mol

21.

How many grams are in 3.62 mol of dicarbon tetroxide?

88.0

3.62

319

159

22.

How many moles are in 6 x 10²³ molecules of H₂O?

600

23.

How many atoms are in 1.50 moles of Hg?

9.03x10²³ atoms Hg

9.03x10²⁴ atoms Hg

903 atoms of Hg

9.03 atoms of Hg

24.

What is the mass in grams of 5.90 mol C₈H_18?

.0512 g

19.4 g

673 g

389 g

25.

A mole of Neon contains
6.02 x 10²³_____.

atoms

formula units

ions

molecules

26.

(0901) Which conversion would you use if you need to convert from MOLES to particles?

$\frac{1\ mole}{6.02\ x\ 10^{23}particles}$

$\frac{6.02\ x\ 10^{23}moles}{1\ particle}$

$\frac{6.02\ x\ 10^{23}particles}{1\ mole}$

$\frac{1\ particle}{6.02\ x\ 10^{23}\ moles}$

27.

1 mole of Ca and 1 mole of Na have the same number of atoms.

True

False

28.

Which conversion factor would you use to calculate correctly the mass of 2 moles of the element titanium?

29.

Which of the following statements regarding the mole is INCORRECT?

A mole is a unit of quantity equal to 6.02 x 10²³ particles.

The number of particles in a mole is known as Avogadro’s number.

A mole of particles of an element is numerically equal to the atomic mass of the element.

none of the above

30.

The mass of one mole of an element is equal to

its atomic number from the periodic table, but in amus.

its atomic mass from the periodic table, but in amus.

its atomic mass from the periodic table, but in grams.

its atomic number from the periodic table, but in grams.

31.

Which of the following dimensional analysis setups will correctly convert 27.76 g of Li to atoms of Li?

32.

Which of the following dimensional analysis setups will correctly convert 4.00x10²³atoms of cobalt to moles of cobalt? How many moles of colbalt are there?

setup B : 0.664 mol Co

setup A: 2.41x10⁴⁷mol Co

setup A : 0.664 mol Co

setup B: 2.41x10⁴⁷mol Co

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Moles and Molar Mass

Total questions: 32

Worksheet time: 1hrs 14mins

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