: Calculate molar mass of the following compounds: NaCl :
Ba(NO3)2:
K(MnO4):
Cl2:
CO2

1. 58.5g/mol

2. 261g/mol

3. 158g/mol

4. 71g/mol

5. 44g/mol

Explanation:

The molar mass of a compound is the total mass of the sum of masses of all individual elements that make up the compound. First, we need to know the atomic masses of each element in a compound.

1. NaCl

Where; Na = 23, and Cl = 35.5

Molar mass of NaCl = 23 + 35.5

= 58.5g/mol

2. Ba(NO3)2:

Where; Ba = 137, N = 14, O = 16

Molar mass of Ba(NO3)2: 137 + {14 + 16(3)} 2

137 + (14 + 48)2

137 + (62)2

137 + 124

= 261g/mol

3. K(MnO4)

Where; K = 39, Mn = 55, O = 16

Molar mass of KMnO4 = 39 + 55 + 16(4)

= 94 + 64

= 158g/mol

4. Cl2

Where; Cl = 35.5

Molar mass of Cl2 = 35.5(2)

= 71g/mol

5. CO2

Where; C = 12, O = 16

Molar Mass of CO2 = 12 + 16(2)

= 12 + 32

= 44g/mol

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