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# Mole concept help!!! watch

1. My revision guide says that relative masses have no units. Although, relative masses are the same as molar mass. And molar mass has an unit!( g/mol)
I'm confused!!!!
2. (Original post by Angelin Ravi)
My revision guide says that relative masses have no units. Although, relative masses are the same as molar mass. And molar mass has an unit!( g/mol)
I'm confused!!!!
So basically molar mass is the relative mass per mol in an element
Eg. CaCl2
40+(35.5*2) =111
How many moles of Ca?
Ans: 111/40
2.775 or 2.8g/mol
Hope this was what you were asking?
3. (Original post by Starlight2000)
So basically molar mass is the relative mass per mol in an element
Eg. CaCl2
40+(35.5*2) =111
How many moles of Ca?
Ans: 111/40
2.775 or 2.8g/mol
Hope this was what you were asking?
Yep! Thanks

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