Mass of 4.82 x 1025 molecules of H2O is approximately ____.
Given that, there are 4.82×1025 molecules of water.
Number of moles of water =Total number of moleculesAvogadro constant=4.82×10256.022×1023=80.04
Therefore, mass of water = Number of moles×Molar Mass
=80.04×18=1440.72 g