How many moles of water, h2o, contain 2.0×1022 molecules of water? (see the hints for assistance in interpreting scientific notation.)
express the quantity in moles to two significant figures.

Answer : The number of moles of water is,

Solution : Given,

Number of water molecules =

As we know that 1 mole of water molecule contains number of water molecules.

As, number of water molecules present in 1 mole  of water molecule

So, number of water molecules present in mole  of water molecule

Therefore, the number of moles of water is,

b.final

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