Question

Calculate the molar mass for sodium sulfate, N a2SO4. A sample of sodium sulfate with a mass of 300.0 g represents what number of moles of sodium sulfate?

Answer 1

300 grams of sodium sulfate represents 2.112 moles

Step-by-step explanation:

Step 1: Data given

Mass of Na2SO4 = 300.0 grams

Step 2: Calculate the molar mass of Na2SO4

Na = 22.99 g/mol

S = 32.065 g/mol

O = 16 g/mol

Molar mass of Na2SO4 = 2*22.99 + 32.065 + 4*16

Molar mass of Na2SO4 = 142.045

Step 3: Calculate moles of Na2SO4

Moles Na2SO4 = mass Na2SO4 / molar mass Na2SO4

Moles Na2SO4 = 300.0 grams / 142.045 g/mol

Moles Na2SO4 = 2.112 moles

300 grams of sodium sulfate represents 2.112 moles