Question

Calculate the number of moles in 50g of H20?

Answer 1

Answer:

Explanation:

moles (n) = mass (m)/molar mass (M)

m(H₂O) = 50 g H₂O

M(H₂O) = (2 × 1.008 g/mol H) + 15.999 g/mol O) = 18.015 g H₂O/mol H₂O

n(H₂O) = 50 g H₂O/18.015 g H₂O/mol H₂O = 2.7755 mol H₂O

Answer 2

Answer:

The number of moles in 50gm of Water (H20) is 2.77 moles.

Explanation:

Data:

Given mass of substance = H20 = 50gm

Formula mass of substance = H20 = 2 + 16 = 18

No. f moles of Water (H20) = ?

Solution:

Formula:

No. of Moles = Given Mass of Substance ÷ Formula Mass/ Atomic Mass

No. of Moles = 50÷18

                     = 2.77 Moles

Hence, the number of moles in 50gm of Water (H20) is 2.77 moles.