find the number of molecules in 1.8 gram of H2O
albert428:
Given mass = 18 grams. Molecular mass of H2O = (2×1) + 16 = 18 grams. Therefore No of moles = Mass of H2O ÷ Molar mass of H20 = 18÷18 = 1
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Hii..
Molar Mass of H2O = 18 gm
Given mass = 1.8 gm
Moles = Given mass / Molar mass
=> Moles of H2O = 1.8 / 18 = 1/10 = 0.1 Mole
So, Molecules of H2O = 0.1 NA
【 NA = Avogadro's number = 6.023×10^23 】
Hope it helps :)
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