Question

The formula mass of the compound Ca(NO3) 2 is:134.09 amu148.10 amu164.10 amu204.18 amu

Answer 1

1) Formula mass. We have to look for every atomic mass of the elements in the compound and multiply by its subscript.

$Ca(NO_3)_2$

Calcium (Ca): 40.078 u

Nitrogen (N): 14.007 u

Oxygen (O): 15.999 u

Formula mass = 40.078 u + (2*14.007 u) + (6*15.999 u) = 164.08 amu.

The answer is 164.10 amu.