Question

Calculate the number of water molecules in 0.16g of water

Answer 1

Hi there ,

☆ Water sample mass = 0.16 g

☆ Water molar mass = 18 g

☆ Number of mole = sample mass ÷ molar mass

= 0.16÷ 18 = 0.00889mol

☆ Number of molescules = mols × avogadros number

☆ Molecules = 0.00889 ×6.02×10^23 = 5.35×10^21 molecul

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