Question

Calculate the relative molecular mass of gypsum!​

Answer 1

Answer:

172 a.m.u.

Explanation:

CaSo4.2H2O

=40+32+64+2×18

=72+64+36

=72+100

=172 a.m.u.

Answer 2

Answer:

Gypsum has a formula of CaSO4 . 2H2O

Explanation:

Calcium molar mass is 40 u/amu/dalton

Sulphur molar mass is 32 u/amu/dalton

Oxygen Molar mass is 16 amu/u/dalton

Water molar mass is 18 u/amu/dalton

So 40 + 32 + 16 x 4 + 18 x 2= 172 u/amu/dalton