Ch10 Review - Moles - ChemS

Molar Mass

100

Magnesium

24.3 g/mol

200

H₂S

34 g/mol

300

N₂

28 g/mol

400

Al₂(C₂O₄)₃

318 g/mol

500

CuSO₄

159.6 g/mol

Mole-Gram & Gram-Mole

100

The mass of 0.35 moles of Ar.

14 grams

200

This is the number of moles in 150. grams of KF.

2.58 moles

300

The mass of 0.250 moles of CaCl₂.

27.7 grams

400

The number of moles in 7.5 grams of Ca(OH)₂

0.10 moles

500

Mass of one mole of water

18g

#Particles & Grams

100

The number of atoms in 8.8 grams of Fe.

9.5 x 10²² atoms

200

The mass of 1.054 x 10²⁴ molecules of CO₂.

77.03 g

300

The number of formula units in 88 grams of K₂S.

4.8 x 10²³

400

The mass of 5.0 x 10²³ molecules of F₂

31.6 g

500

A copper penny weighs 3.1 g.  How many copper atoms are in one penny.

2.9 x 10²² atoms

Mole & #Particles

100

The number of particles in 1 mole of any substance.

6.02 x 10²³

200

The number of moles in 5.26 x 10²⁴ atoms of Ag.

8.74 moles

300

The number of formula units in 2.8 moles of (NH₄)₂S

1.7 x 10²⁴

400

The number of formula units in 1.9 moles of NaCl.

1.1 x 10²⁴

500

The number of molecules in 0.10 moles of H₂SO₄.

What is 6.02 x 10²² atoms?

% Composition

100

CO

C: 42.9%

O: 57.1%

200

H₂O

H: 11%

O: 89%

300

Fe₂O₃

Fe: 69.8%

O: 30.1%

400

Ca(NO₃)₂

Molar Mass = 164 g/mol

Ca = 24.5%  N = 17.1%  

O = 58.5%

500

Mass of sulfur in 75 grams of Al₂(SO₄)_3. Molar mass Al₂(SO₄)₃ =342.14 g/mol.

21.1 g S