Free Printable MOLES INTRO

Worksheets

MOLES INTRO

Total questions: 23

Worksheet time: 6hrs 45mins

Name

Class

Date

How many atoms are in 9.44 moles of Al?

5.68 atomsAl

5.68x10²⁴atoms Al

0.705 atoms Al

1.25x10²³atoms Al

How many moles are 2.85 x 10¹⁸ atoms of iron?

4.73 x 10^-6 moles

1.72 x 10⁴² moles

1.72 x 10^-42 moles

4.73 x 10⁶ moles

How many moles of copper are 4.57 x 10¹³ atoms of copper?

7.59 x 10^-11 moles

2.75 x 10³⁷ moles

7.59 x 10¹¹ moles

2.75 x 10³³ moles

How many molecules are in 9.44 moles of AlCl₃?

5.68 molec AlCl₃

5.68x10²⁴molec AlCl₃

0.705 molec AlCl₃

1.25x10²³molec AlCl₃

Which of these is true for the chemical formula 4NH₃?

3 Nitrogen atoms

7 Hydrogens atoms

12 Nitrogens atoms

12 Hydrogens atoms

How many molecules are in 9.4 moles of AlCl₃?

5.66

5.66x10²⁴

0.705

1.25x10²³

Covalent compounds are called molecules. Ionic compounds are called formula units. How many moles of CaO contain 6.02x10²⁵formula units?

100

560

How many atoms are in 8.5 mole of nickel?

8500 Ni atoms

6.02 * 10²³ Ni atoms

5.1 * 10²⁴ Ni atoms

5.1 * 10²³ Ni atoms

How many molecules are there in 31.8 moles of water?

5.28 x 10^-23 molecules

1.91 x 10²⁵ molecules

10.

How many moles are 2.85 x 10¹⁸ atoms of iron?

4.73 x 10^-6 moles

1.72 x 10⁴² moles

11.

How many formula units are there in 2.45 moles potassium chloride?

4.07 x 10^-24 formula units

1.47 x 10²⁴ formula units

12.

What is the molar mass of CO₂?

12 g/mol

16 g/mol

32 g/mol

44 g/mol

13.

Find the molar mass of KCl

36 g/mol

78 g/mol

74 g/mol

178 g/mol

14.

Find the molar masses of the following compounds:

(NH₄)₂CO₃

303.3 g/mole

102.9 g/mole

74.1 g/mole

160.0 g/mole

96.0 g/mole

15.

Find the molar masses of the following compound

C₆H₁₂O₆

303.3 g/mole

102.9 g/mole

180.0 g/mol

160.0 g/mole

96.0 g/mole

16.

C₃H₅(NO₃)₃

C = 3, H = 5, N = 3, O = 9

C = 3, H = 5, N = 1, O = 9

C = 9, H = 15, N = 3, O = 9

C = 9, H = 15, N = 1, O = 3

17.

H₂SO₄

H = 2, S = 4, O = 4

H = 2, S = 1, O = 4

H = 8, S = 4, O = 4

H = 2, SO = 4

18.

Calculate the molar mass of NH₄NO₂

50 g/mol

60 g/mol

64 g/mol

78 g/mol

19.

What is the definition of molar mass?

number of grams in one mole of a substance

whole number ratio that is a multiple of a chemical formula

simplest, whole number ratio of a chemical formula

6.02 x 10^23 particles per one mole of a substance

20.

Calculate the molar mass for Al(OH)₃

78.0 g/mol

72 g/mol

28 g/mol

25 g/mol

21.

How many atoms of Iron(Fe) are in this compound?

22.

How many atoms of oxygen(O) are in

3Fe₂O₃

23.

Which of the following shows the elements with correct numbers of ATOMS for this molecule