Question
What is the mass of 4.82 x 1025 molecules of H2O in grams?
Answer: Option A
:
A
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A
Number of moles of water =Total number of moleculesAvogadro constant=4.82×10256.022×1023=80
Therefore, mass of water = Number of moles×Molecular Mass
=80×18=1440.71 g
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