mN2=2*14u=28 u
mSO3=32u+3*16u=80 u
mMg3(PO4)2=3*24u+2*31u+8*16u=262 u
m(C3H7COO)2Cu=2*(4*12u+7*1u+2*16u)+63,5u=237,5 u
