Question
The number of water molecules is maximum in
-
18 molecules of water
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1.8 g of water
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18 g of water
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18 moles of water
Solution
D.
18 moles of water
Mole is the biggest unit to measure the number of molecules/atom/ions.
therefore,
1 mole of water contains molecules = 6.02 x 1023
therefore, 18 moles of water contain molecules
= 18 x 6.02 x 1023 molecules
Now, 1 mole of water = 18 g of water
Hence, number of molecules in 18 g of water
= 6.02 x1023
and 1.8 g of water contains = 6.02 x 1022 molecules.
= 6.02 x1023
and 1.8 g of water contains = 6.02 x 1022 molecules.
