Free Printable Interim #3 Review

Worksheets

Interim #3 Review

Total questions: 16

Worksheet time: 45mins

Name

Class

Date

How many atoms are in 1 mole of NaCl?

6.02 x 10²³

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

Which conversion factor should be used for the following question " How many molecules are there in 4.00 moles of glucose, C₆H₁₂O₆?

1 mole = 78.12 g

1 mole = 22.4 L

1 mol = 6.02x 10²³ particles

more than one

How many molecules are in 2.5 mol of NaCl?

1.51x10²³

146

4.15

1.51x10²⁴

What is the molar mass of Calcium Oxide (CaO)?

56.1

112.2

24.0

40.1

At STP, 1 mol of gas has a volume of

34L

22.4L

60L

0.6L

Determine the volume, in liters, of 1.2 mole SO₂ gas at STP.

13 L

26 L

6.5 L

What is a limiting reactant?

the reactant that determines how much product can be made

the reactant that is in excess

the product that you can make the most of

the amount of reactants that react with each other

Fe + S --> FeS

If 7.62g Fe and 8.67g S are combined, what is the limiting reactant? (Fe = 55.85 g/mol; S = 32.07 g/mol)

FeS

none

10.

When does a chemical reaction stop?

When the lab is finished

When the excess reactant is used up

When the limiting reactant is used up

Chemical reactions never stop

11.

What is the mole ratio of H₂O to H₃PO₄ in the following chemical equation? P₄O₁₀ + 6 H₂O --> 4 H₃PO₄

6:4

4:6

1:3

3:1

12.

When reacting Na with Cl₂, we calculated that the theoretical yield should be 13 grams. Our actual yield was 12.5 grams. What is the percent yield?

90.4%

104%

96.15%

1.04%

13.

A chemical formula that shows the actual # and kinds of atoms present in one molecule of a compound is called_________

ionic formula

covalent formula

empirical formula

molecular formula

14.

What is the empirical formula for C₄H₆?

CH₃

C₂H₃

C₄H₆

15.

What is the empirical formula if you have 81.82% carbon and 18.18% hydrogen?

C3H8

CH4

C2H2

C4H10

16.