Molar mass is g/mole
therefor get each elements mass and add the masses together to get molar mass
What is the molar mass of Mg(NO3)2? Explain how you calculated this value.
2 answers
MgN2O6
http://www.ehow.com/how_4505969_calculate-molar-mass.html
http://www.ehow.com/how_4505969_calculate-molar-mass.html