Excuse my Typo, ( A3= 15.995) the molecular weight of oxygen is 15.9994

"Mike H" wrote:

Roger,

I'm not aware of any inbuilt function but setting up manual calculation is
simple enough.

For water we need the molecular weights of the elements and there are plenty
of tables on the net for this including this one:-

http://hamers.chem.wisc.edu/chapman/Other/chem.html

Water is 2 part H and 1 part O so enter the molecular weight for each in a
cell and add them up:

2*H = 2*
1*O = 15.9994

so A1=1.00794
A2= 1.00794
A3= 15.995
A4=sum(a1:a3) =18.01528
So 1 mol of water equals 18.01528 gms

Mike

"Roger" wrote:

Hello,

In excel how do i work out how much 1 mol of water weighs?