Answer :
To find the molar mass of the given compound, we have use the molar masses of each element present in the molecule and multiply them by the number of atoms of each element in the molecule. Once we have these values, add them.
It means that we have to multiply the molar mass of Cr times 1, the molar mas of N times 2 and the molar mass of O times 6:
[tex]52g/mol\cdot1+14g/mol\cdot2+16g/mol\cdot6=176g/mol[/tex]It means that the molar mass of Cr(NO3)2 is 176g/mol.