Question

Find the number of water molecules present in 18 grams of water​

Answer 1

Explanation:

If we have one mole of water, then we know that it will have a mass of 2 grams (for 2 moles of H atoms) + 16 grams (for one mole O atom) = 18 grams. Since we only have 0.001 grams, that means that we have NA * (0.001/18) = 3.35*1019 molecules of water!

Answer 2

Answer:

6.02 x 10 23

Explanation:

If you have 18g of water then the atomic mass of hydrogen is 1 and of oxygen is 16, therefore the molecular mass of H2O is 18 . THERE are 6.02 x 10 23 molecules of water in your sample. You have one mole.

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