if a water bottle has a capacity to carry 180g of water and it is half filled then
a) calculate the number of moles of water
b) calculate the number of molecules of water
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in first case weight of water in the water is 90 gram so moles is equal to 90 / 18 is 5 moles.
So molecules of water in 5 moles is 5NA.
So molecules of water in 5 moles is 5NA.
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