Free Printable Review of Molar Mass/Moles/Scientific Notation and Sig Digs

Worksheets

Review of Molar Mass/Moles/Scientific Notation and Sig Digs

Total questions: 23

Worksheet time: 25mins

Name

Class

Date

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

Atomic mass

Atomic number

Oxidation number

Valence electrons

What is the numerical value of Avogadro's number?

60.22x10²³

6.022x10²³

6.022x10³²

6.022x10²⁴

What is the mass of one mole of aluminum chloride?

62.43 g

116.40 g

133.33 g

97.88 g

What is the molar mass of phosphorus?

123.88 g

30.97 g

123.88 g/mol

30.97 g/mol

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

What are the units for molar mass?

grams

amu

grams/mole

liters

The rule of scientific notation is to write all exponents with a base of ____.

100

How many moles of K₂SO₄ would have a mass of 50.0 g?

0.287 mol

287 mol

8.71 x 10³mol

28.6 mol

How many grams are in 2.40 mol of sulfur?

9.35 x 10^-3g

77.0 g

616 g

0.0748 g

10.

How would you write 0.00051 in scientific notation?

51 x 10⁵

5.1 x 10^-4

5.1 x 10^-3

5.1 x 10⁴

11.

What is the molar mass of ammonium sulfate?

114.12 g/mol

132.17 g/mol

209.27 g/mol

2.32x10⁵ g/mol

12.

How many moles are in 98.3 g of aluminium hydroxide?

0.794 mol

1.26 mol

2.23 mol

7.67x10³ mol

13.

If the exponent is a negative number...

you will get a large number

you will get a small number

14.

What is 3,525 in scientific notation with 3 significant digits?

3.52 x 10³

3.53 x 10³

3.53 x 10⁴

3.5 x 10³

15.

Write 0.00999 in scientific notation with two significant digits.

0.99 x 10^-2

1.0 x 10^-2

1.0 x 10^-3

9.9 x 10^-3

16.

Which one of these is in scientific notation?

8.987000

8.98 x 10⁶

80.987 x 10

8.98⁶

17.

Calculate 12.34 + 1.234 + 0.1234 and give your answer with the correct number of significant figures.

13.6974

13.697

13.70

13.7

18.

How many significant figures does the following number have: 100.00210

19.

Round 0.010229 to four significant figures

1022

1023

0.01023

0.01022

20.

Calculate 1.23 m x 0.89 m and give your answer with the correct number of significant figures.

1.0 m²

1.1 m²

1.0947 m²

1.095 m²

21.

Calculate the molar mass of Ba(C₂H₃O₂)₂

255.43 g/mol

392.76 g/mol

228.3 g/mol

184.37 g/mol

22.

What is the mass in grams of 6.25 mol of copper (II) nitrate?

0.0498 g

785 g

0.0333 g

1.17 x 10³ g

23.

if given 39.65 g and 2.47 moles of a substance, the substance is most likely:

Methane

Water

Ammonia

Propane

Reset

Review of Molar Mass/Moles/Scientific Notation and Sig Digs

Total questions: 23

Worksheet time: 25mins

Similar Resources on Wayground