How many molecules of H2O in 100kg of snow? dont know where the density comes in

[boom baby]

How many molecules of H2O in 100kg of snow?? don't know where the density comes in!

Homework Statement

How many molecules of H2O are there in 100kg of snow? Density of snow is given as 800 kg/m3

Homework Equations

1 mole = 6.023x10^23 molecules
mass/molecular mass = number of moles

The Attempt at a Solution

This is my attempt, ignoring the density.

1 mole of H2O = 6.023x10^23 molecules of H2O

Hence 18g H2O contains 6x10^23 molecules
1g = 3.346x10^22 molecules
100,000g (100kg) = 3.346x10^27 molecules of H2O

Where/how does the density come into it?

 

[Ygggdrasil]

Your solution is correct. You don't need the density to solve the problem, so it's there to confuse you.

 

[boom baby]

Excellent. Thanks man