In what cases do you include the '2' e.g. 2H2O, in the mr calculations?
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Relative formula mass calculations watch
- Thread Starter
- 10-11-2015 17:37
- 10-11-2015 18:03
If you measure out a certain mass of the hydrated compound.
To work out the amount (in mol) of that solid, you'll need the Mr of the entire chemical, including the waters.