A Level Chemistry Moles (OCR)

Hey. This may sound like a really stupid question but for some reason I can't get my head around it.
So my teacher gave us this.
H20
Q1) How many moles of water?
Q2) How many moles of oxygen atoms?
Q3) How many moles of hydrogen atoms?
The answer was Q1 =1, Q2=1, Q3=2
I know there a 2 atoms of hydrogen and 1 of oxygen but why does this mean there is one mole of oxygen and two moles of hydrogen?????
I'm probably way overthinking it but any answers would be appreciated :smile:

Reply 1

charco

Study Forum Helper

Original post by convivialkiwi

The mole is just a number ... a very big number .... actually a really big number...

6022300000000000000000000

so, if water has one oxygen atom for every two hydrogen atoms

It must have one mole of oxygen atoms for every two moles of hydrogen atoms

in one mole of water.

-----------------------------------------------------------------------------------------------
Signature
Colourful Solutions IB Chemistry Testing and Notes