units:grams per mole

g/molorg

mol

Molar Mass:mass of one mole of particles

6.02 x 1023

particles1

mole

12.01g

32.07g

200.59g

55.85g

PeriodicTable

CS

Hg

Fe

2 (H) + 1 (O) =

2 (1.01) + 1 (16.00) = 18.02 g/mol

from the PT

6 (C) + 12 (H) + 6 (O) =

6 (12.01) + 12 (1.01) + 6 (16.00) =

180.18 g/mol

1 (Al) + 3 (O) + 3 (H) =

1 (26.98) + 3 (16.00) + 3 (1.01) =

78.01 g/mol

1. A mole of hydrogen gas, H2(g),

contains 6.02 x 1023 ________ of H2(g)

A. molecules

B. atoms

C. moles

D. grams

Quick Quiz!

2. The molar mass of fluorine (F) is _________.

A. 6.02 x 1023 mol

B. 19.00 g

C. 19.00 g/mol

D. 6.02 x 1023 atoms

Quick Quiz.

3. Calculate the molar mass of ammonia.

A. 45.03 g/mol

B. 17.04 g/mol

C. 15.01 g/mol

D. 12.97 g/mol

Quick Quiz.

NH3

1 (N) + 3 (H) =1 (14.01) + 3 (1.01) = 17.04 g/mol

4. Calculate the molar mass of ammonium sulfate.

A. 118.10 g/mol

B. 132.17 g/mol

C. 114.06 g/mol

D. 228.12 g/mol

Quick Quiz.

(NH4)2SO4

2 (N) + 8 (H) + 1 (S) + 4 (O) =2 (14.01) + 8 (1.01) + 1 (32.07) + 4 (16.00) =

132.17 g/mol