Question

What is the mass of 3.75 moles of NaCl

Answer 1

mass of 3.75 moles of NaCl = 219.375 grams

Step-by-step explanation:

Firstly, one need to calculate the molar mass of the compound, sodium chloride. Calculating the molar mass of the compound is adding the atomic mass of each atom present in the compound.

The compound contains 1 atom of sodium and 1 atom of chlorine.

Atomic mass of Na = 23 g

Atomic mass of Cl = 35.5 g

Molar mass of the compound = 23 + 35.5 = 58.5 g per mol

1 mole of NaCl contains 58.5 g

3.75 moles will contain ?

cross multiply

mass of 3.75 moles = 3.75 × 58.5

mass of 3.75 moles of NaCl = 219.375 grams

Answer 2

m (NaCl) = n × M = 3.75 × 58.5 =
219.375 g

M (NaCl) = 23 + 35.5 = 58.5 g/mol