What is the formula mass of calcium sulfate dihydrate [caso4⋅2h2o]?

be sure to add the water of hydration, which is the 2h2o part (water surrounding the calcium sulfate).

136 g/mol

154 g/mol

164 g/mol

172 g/mol

172 is correct

Option d = 172 g/mol

Explanation:

Formula mass of [CaSO₄.2H₂O]

Formula mass = 40.078 + 32.065 + 4×16 + 4 + 16×2

Formula mass = 40.078 + 32.065 + 64 + 4 + 32

Formula mass = 172.143 g/mol

so, 172 g/mol is the correct answer.

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.