Question

Calculator the formula unit mass of caco3. (atomic mass of ca =40u, c=12u, o=16u)

Answer 1

the unit mass of CaCO3 is,
=40+12+(16×3)
=40+12+48
=100

Answer 2

Given: The given compound is $CaCO_3$.

To find: We have to find its formula unit mass.

Solution:

The formula of calcium carbonate is $CaCO_3$.

The atomic mass of Ca is 40.

The atomic mass of C is 12 and the atomic mass of oxygen is 16.

This compound has one Ca, one C and three oxygen atoms.

So, its formula unit mass will be-

$40 + 12 + 16 \times 3 \\ 40 + 12 + 48 \\ = 100$

The formula unit mass of calcium carbonate is 100.