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How many H2O molecules are contained in 1.50 L of water? Assume the density of water...

How many H2O molecules are contained in 1.50 L of water? Assume the density of water is 1.00 g/mL.

How many H atoms are contained in 1.50 L of water? Assume the density of water is 1.00 g/mL.

please show work, thanks

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