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Molar mass and Mole Conversions Quiz-30 min

Total questions: 16

Worksheet time: 1hrs 6mins

Name
Class
Date
1.

How many moles of Mg are in 19.82 g Mg?

a)

1.226mol Mg

b)

481.7mol Mg

c)

1.000mol Mg

d)

0.8156 mol Mg

2.
What are the units for molar mass?
a)
grams
b)
amu
c)
grams/mole
d)
liters
3.

Avogadro's number of representative particles or "n" is equal to one_____.

a)

kilogram

b)

gram

c)

kelvin

d)

mole

4.

Which of the following set ups using BRIDGES (dimensional analysis) will correctly convert 4.00x1023atoms of cobalt to moles of cobalt? What is the actual answer for moles of Co?

a)

setup B : 0.6644mol Co

b)

setup A: 2.41x1047mol Co

c)

setup A : 0.664mol Co

d)

setup B: 2.41x1047mol Co

5.
How many water molecules are in 5.2 moles of water?
a)
6.02 x 1023
b)
5.2
c)
3.1 x 1024
d)
8.638 x 10-24
6.

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

a)

28 grams

b)

24 grams

c)

6.02 grams

d)

1.2 grams

7.
What is the molar mass of Gold (III) chloride?
a)
196.967 g
b)
626.354 g
c)
232.42 g
d)
303.326 g
8.

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

a)

A

b)

B

c)

C

d)

D

9.

How many grams of potassium sulfide are in 3.33 mol of Potassium Sulfide?

a)

367 g

b)

454 g

c)

238 g

d)

132 g

10.

How many grams of carbon monoxide are in 1.2 x 1024 molecules of CO?

a)

28 grams

b)

56 grams

c)

6.02 grams

d)

1.2 grams

11.

How many particles, "n", are in 13.5 grams of Beryllium?

a)

1.5 particles

b)

9 particles

c)

4x1023 particles

d)

9x1023 particles

12.

How many moles of argon atoms are present in 11.2 L of argon gas at STP? Remember at STP there are 22.4L/mol of a gas.

a)

250.88 mol Ar

b)

0.500 mol Ar

c)

2 mol Ar

d)

1 mol Ar

13.

What is the molar mass of one molecule of Nitrogen gas? Think first, what is the formula for nitrogen gas???

a)

14.01 amu

b)

14.01 g

c)

28.02 g

d)

28.02 amu

14.
Which has more atoms, 12.0 mol of C or 12.0 mol of Ca?
a)
12.0 mol C
b)
12.0 mol Ca
c)
They are equal
15.

What operation will be performed when converting from moles to another unit?

a)

addition and/or subtraction

b)

subtraction

c)

multiplication and/or division

16.

How many moles of water are in 16.94g of water?

a)

16.94 mol H2O

b)

0.9401 mol H2O

c)

305.3 mol H2O

d)

1.063 mol H2O