Question

$\huge \bf{\fbox{Question}}$
What is the mass of 0.5 mol of water and ammonia? (Atomic mass of H = 1, O = 16, N = 14)
Give brief answer...​

Answer 1

Answer :

Step-by-step explanation :-

• Ammonia ( NH3 )

› Mass, m = ?

› Molecular mass, M = 14+1*3 = 17 u

› Number of moles, n = 0.5

By using formula, n = m / M

› 0.5 = m / 17

› m = 0.5 × 17

› m = 8.5 g

• Water ( H2O )

› Mass, m = ?

› Molecular mass, M = 1*2+16 = 18 u

› Number of moles, n = 0.5

By using formula, n = m / M

› 0.5 = m / 18

› m = 0.5 × 18

› m = 9 g

Therefore, mass of 0.5 mol of water is 8.5 g and ammonia is 9 g.

Hope it helps!