Calculate the number of molecules in 45g of water.(molecular mass of oxygen is 32u and that of hydrogen is 2u)
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Mass of water = 45 g
Molecular mass of oxygen = 32g
Molecular mass of hydrogen = 2 g
So,
Molecular mass of water = 32 + 2 = 34 g
Number of molecules on 45g of water = ?
Since,
Number of moles of water = Mass of water / Molecular mass of water
Number of moles of water = 45 / 34
Number of moles of water = 1.32 moles
which is the required answer.
Hope it helps. Thanks.
Molecular mass of oxygen = 32g
Molecular mass of hydrogen = 2 g
So,
Molecular mass of water = 32 + 2 = 34 g
Number of molecules on 45g of water = ?
Since,
Number of moles of water = Mass of water / Molecular mass of water
Number of moles of water = 45 / 34
Number of moles of water = 1.32 moles
which is the required answer.
Hope it helps. Thanks.
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