Question

Calculate the mass of 0.5 moles of H2O

Answer 1

No : of moles = 0.5

Molar mass of H₂O = 2 × 1 + 1 ×16 = 18 grams

No : of moles = Given mass / Molar mass

Mass = Molar mass × No : of moles
= 18 ×0.5
= 9grams

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Answer 2

n=0.5mol
M=18g
m =?
n=m÷M
m=n*M
m= 0.5 *18
m = 9g i hope this answer is helpful to u