Question

Calculate the moles of ammonia present in a 3.956 g sample of ammonia, which has a molar mass of 17.030 g/mol.

Type answer:

Answer 1

0.2322 moles of ammonia

Step-by-step explanation:

given:

mass of ammonia: 3.956 g

unknown: moles of ammonia

=
`given(1 mol)/(MolarMass)`

=
`3.956(1)/(17.030)`

=0.2322 moles of ammonia

Answer 2

the number of moles of ammonia present in the sample is 0.232 moles (to three significant figures).