Chee Wan's answer to Anonymous's Secondary 3 E Maths Singapore question.
how would you find the answer if they ask for it in grams?
Once you have the moles of the substance, you can calculate the mass in grams using:
Mass = moles x molar mass
For example, mass of 0.5 moles of CO2
= 0.5 x (12 + 2x16) = 22.0 g
Molar mass is a more general term, that can be used to refer to relative atomic mass or relative molecular mass.
Mass = moles x molar mass
For example, mass of 0.5 moles of CO2
= 0.5 x (12 + 2x16) = 22.0 g
Molar mass is a more general term, that can be used to refer to relative atomic mass or relative molecular mass.
ok thx
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