How many water molecules or particles are in 5.5 moles of water.

Question

Chemistry

Tristian Ellis

21 July, 07:37

How many water molecules or particles are in 5.5 moles of water.

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Jan Lara · Answer 1

It is equal to Avogadro's number (NA), namely 6.022 x10 23. 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!