calculate the number of molecules in 6.4g of so2. (b) 1.5 moles of hydrogen chloride

Answer 1

number of moles = mass/Molar mass
N=m/Mr

Answer 2

Kate didn't answer all of the question.
mols SO2 = grams SO2/molar mass SO2 = ?
Then there are 6.02E2 molecules in 1 mol

Answer 3

Mass=

Answer 4

The number of molecules in 6.4g of so2 (s=32,o=16),32+16*2=64g
64g(1 mol) of so2 contains 6.02*10^23 molecules
6.4g of so2 contains=6.02*10^23*6.4/64,
=6.02*10^22.answer