Question

How many grams nh3 are equivalent to 9.3 x 1023 molecules nh3?

Answer 1

To solve this, we need the Avogadros number to convert to moles then multiply with molar mass to convert to mass in grams.

moles = 9.3 x 10^23 molecules * (1 mol / 6.022 x 10^23 molecules)

moles = 1.54 moles

Molar mass of NH3 is 17 g/mol:

mass = 1.54 moles * 17 g/mol

mass = 26.25 g