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Worksheets

Mixed Mole Conversions

Total questions: 15

Worksheet time: 41mins

Name
Class
Date
1.

What is the molar mass of Mg3N2?

a)

191.26 g/mol

b)

76.645 g/mol

c)

38.332 g/mol

d)

100.929 g/mol

2.

Calculate the molar mass of Ba(C2H3O2)2

a)

255.416 g/mol

b)

237.153 g/mol

c)

392.744 g/mol

d)

196.347 g/mol

3.

Would you need to use the Periodic Table in this problem?


How many grams are in 1.2 x 1024 atoms of CO?

a)

no

b)

yes

4.

Would you need to use Avogadro's number in this problem?


How many grams are in 1.2 x 1024 atoms of CO?

a)

no

b)

yes

5.

Do you need to use your Periodic Table in this problem?

How many moles are in 3.25x1024 atoms of NH3?

a)

yes

b)

no

6.

Would you need to use your periodic table in this question?


How many moles are in 4.5x1024 atoms of water?

a)

yes

b)

no

7.

Would you need to use Avogadro's number in this question?


How many atoms are in 6.00g of carbon?

a)

yes

b)

no

8.

How many moles are in 4.5x1024 atoms of water?

a)

7.5 particles

b)

7.5 mol

c)

2.7x1047 mol

d)

2.7x1047 particles

9.

What is the mass of 9.4 moles of B2(Cr2O7)3?

a)

6.4 x 1022g

b)

5.7x1024 g

c)

49 g

d)

6298 g

10.

Which of the following statements regarding the mole is INCORRECT?

a)

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

b)

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

c)

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

d)

none of the above

11.

The mass of one mole of an element is equal to

a)

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

b)

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

c)

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

d)

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

12.

At STP, 2.5 moles of helium gas will have what volume?

a)

9 L

b)

56 L

c)

27 L

d)

72 L

13.

An antique neon sign contains 1.5 g of neon. How many moles of neon are in the sign?

a)

0.074 moles

b)

0.056 moles

c)

0.083 moles

d)

0.062 moles

14.

Which has the most particles?

a)

1 mole H2

b)

1 mole Na1+

c)

1 mole Al(OH)3

d)

These are all the same

15.

SELECT ALL CORRECT ANSWERS - The mole can be used to measure:

a)

The amount of atoms in an element

b)

The amount of molecules in a covalent substance

c)

The amount of formula units in an ionic compound

d)

The amount of mass an object has