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.

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.

the answer is option a.