Question

Chemistry : How many molecules of water are there in 54 g of H₂O ?
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Answer 1

Question :

• How many molecules of water are there in 54 g of H₂O ?

Answer :

• There are $ 1.8 \times {10^{24}} $ molecules in $ 54 $ grams of water.

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Answer 2

★ Solution :

• Molar Mass of H₂O = 2 + 16 = 18 g/moles

So, Number of Moles of H₂O = Mass/Molar

• Mass = ⁵⁴/₁₈ = 3 moles

➛ Now 1 moles = 6.022 × 10²³ molecule

• Answer : So 3 moles will have 18.066 × 10²³ molecule.

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