How much do 3.83 × 1022 molecules of water weigh?

Question

The answer in units of g. 

(if you can, can you explain/showing steps)

Answer 1

Try these steps:

 

(1)  Look up the molecular weight of water in grams per mole (or just add twice the atomic weight of hydrogen to the atomic weight of oxygen, in grams per mole)

 

(2)  Find how many moles of water you have by dividing the given number of water molecules by Avogadro's number, which is 6.02 x 10²³ molecules per mole.

 

(3) Multiply the result from (2) by the molecular weight of water (in grams per mole) and that will be the mass in grams