What will be the mass in grams of 1000000 molecules of water?

Dear Student,

Mass of one mole of water = 2(atomic mass of Hydrogen) + atomic mass of oxygen
 = 2(1.008) + 16
= 18.02 g


We know that,
1 mol = 6.023 × 1023 molecules

Therefore, 106 molecules have = 106 / 6.023 × 1023 moles
= 1.66 × 10-19 moles



So, mass of 1.66 × 10-19 moles of water  = (18.02 × 1.66 × 10-19 grams
= 2.9 × 10-20 g

Hope this information will clear your doubts about topic.

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