Compound is BrI. Mass is 21.8 mg. How many moles are there?

Answer 1

Moles = mass / molar mass

mass = 21.8 mg x 1 g/1000 mg = 0.0218 g

molar mass = 79.9 + 126.9 = 206.8 g/mol

MOLES = 0.0218 g x 1 mol/206.8 g = 0.000105 moles = 1.05x10^-4 moles