Question

. .......... g of water make 1 mole of water.

A. 32

B. 33

C. 16

D. 18

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Answer 1

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18 grams

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Answer 2

D. 18 g of water make 1 mole of water

• Molar mass can be calculated by adding up the molar mass of individual constituents of the molecule.
• A molecule of water is made up of 2 atoms of hydrogen and 1 atoms of oxygen.
• Molar mass of hydrogen is 1 gram/mole and molar mass of oxygen is 16 gram/mole.
• Total molar mass of water = 16 + 1 + 1
• Hence, molar mass of water 18 gram/mole.