Question

what is the weight of 15 moles of NaCl ​

Answer 1

No. of moles = 15 mol

Unified mass of NaCl = 23 u + 35.5 u = 58.5 u

∴ Molar mass = 58.5 g

We know,

Mass = (No. of moles)(Molar mass)

⇒ Mass = (15)(58.5)

⇒ Mass = 877.5 g or 0.8775 kg

∴ Weight of 15 mol of NaCl is 877.5 grams.