Question

What is the gram formula mass of caso4.2h2o?

Answer 1

So your practically trying to finding the molar mass of CaSO₄.2H₂O and that is found by adding all the molar masses of the individual elements:

So Ca = 40 g/mol
      S  = 32 g/mol
      O = 16 /mol
      H = 1 g/mol

molar mass of CaSO₄.2H₂O = [(40) + (32) + (16 × 4) + (2 × 1 × 2) + (2 × 16)]
                                              = 172 g/mol

Answer 2

Answer : The gram formula mass of $CaSO_4.2H_2O$ is, 172 g/mole

Explanation :

As we know that,

Molar mass of calcium (Ca) = 40 g/mole

Molar mass of sulfur (S) = 32 g/mole

Molar mass of oxygen (O) = 16 g/mole

Molar mass of hydrogen (H) = 1 g/mole

Now we have to calculate the gram formula mass of $CaSO_4.2H_2O$

In $CaSO_4.2H_2O$, there are 1 calcium atom, 1 sulfur atom, 6 oxygen atom and 4 hydrogen atom.

The gram formula mass of $CaSO_4.2H_2O$ = $40+32+6(16)+4(1)=172g/mole$

Therefore, the gram formula mass of $CaSO_4.2H_2O$ is, 172 g/mole