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Intro to The Mole Concept

Total questions: 20

Worksheet time: 2hrs 40mins

Name
Class
Date
1.

How many atoms of iodine are in a mole of iodine?

a)
53
b)
63.55g
c)
126.9
d)
6.02 x 1023
2.

How can you figure out how particles (atoms) there are in 2 moles?

a)
2
b)
2 x (6.02 x 1023)
c)
2 x (atomic mass)
d)
2 ÷ (6.02 x 1023)
3.

How many Carbon Atoms are in 4 moles of Carbon?

a)

6.02 x 1023

b)

1.33 x 1023

c)

4.52

d)

2.408 x 1024

4.

What is the gram atomic mass (molar mass) of sodium?

a)
11
b)
23
c)
45.98
d)
3
5.

Which of the following statements regarding the mole is incorrect?

a)

A mole is a counting unit equal to 6.02 x 10^23 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

6.

How many moles are in 3.01 x 1023 atoms of magnesium?

a)

0.500 moles

b)

1.81 x 1046 moles

c)

5.00 x 1021 moles

d)

5.00 moles

7.

What is the molar mass (gram atomic mass) of carbon?

a)
6.0 g/mol
b)
12.0 g/mol
c)
22.4 g/mol
d)
6.02 x 1023 g/mol
8.

The molar mass of an element is the mass of one ____ of the element, with numbers taken from the mass number on the periodic table.

a)

atom

b)

molecule

c)

mole

d)

gram

9.

How many gram is 0.5 mol of Copper atoms? (Cu:63.5g/mol)

a)

63.5 g

b)

6.35 g

c)

31.75 g

d)

3.175 g

10.
Which would have more atoms?
a)
1 mole of Li
b)
1 mole of Au
c)
1 mole of Si
d)
None, all are equal
11.
How many moles are in 20 grams of Ca (Calcium)?
a)
0.5 
b)
1
c)
3
d)
20
12.

Why is the mole used to measure the atom?

a)

Atoms are extremely tiny particles, and their size varies from element to element

b)

Atoms are all the same size for every element

c)

Some atoms cannot be counted using the mole

d)

Tu eres loco, Ms. Nelson

13.

When comparing a mole of oxygen and a mole of sulfur, how many atoms does each have?

a)

oxygen has 16 grams of atoms

b)

sulfur has 32.06 grams of atoms

c)

both contains 6.02 x 1023 atoms

d)

can be determined

14.

How many grams is 3 moles of sulfur?

a)

96g

b)

32g

c)

16g

d)

8g

15.

How many particles are found in a mole?

a)

6.02 x 10236.02\ x\ 10^{23}  

b)

6.02 x 10236.02\ x\ 1023  

c)

602 x 1023602\ x\ 10^{23}  

d)

602 x 1023602\ x\ 1023  

16.

How many grams are in 1 mole of Mg?

a)

12 grams

b)

24 grams

c)

36 grams

d)

6.022 x 1023 grams

17.

How many grams are in 10 mol of fluorine?

a)

19 grams

b)

190 grams

c)

90 grams

d)

9 grams

18.

3.01 x 1023 atoms is

a)

.5 mol = 1/2 of a mole

b)

.75 mol = 3/4 of a mole

c)

1 mol

19.

What are the units for molar mass?

a)

squirrels

b)

amu

c)

grams/mole

d)

liters

20.

How many atoms are in 3 moles of ANY ELEMENT?

a)

Multiply 3 x 26.981 g/mol

b)

Multiply 3 x (6.02 x 1023) = 1.806 x 1024 atoms

c)

13 g/mol

d)

26.981 g/mol