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

What limiting factors are contributing to the decrease in honey bee population?

Which of the following is an incorrect step to do a complete stoichiometric calculation? Write the mole ratio. Write the dimensional analysis. Write the balanced chemical equation. Write the number of atoms in a mole of the product

A scientist took a sample of enzymes from cow saliva and mixed them with a form of starch found in grains. After a while the starch broke into many smaller molecules. This shows that Question 2 options: cows should not be fed grains.

Why is radioactive decay used to determine age of rocks?

Erosion involves the weathering of rock and the of sediment. O A) burial OB) deposition OC) cementation OD) transportation

Enter your answer in the provided box. A sample of an unknown gas effuses in 14.5 min. An equal volume of H2 in the same apparatus under the same conditions effuses in 2.42 min. What is the molar mass of the unknown gas

What volume will 0.710 moles of nitrogen gas occupy at STP?

4) Acompound has an empirical formula of Na2co3, and a molar mass of 3.18g/mol. Find its molecular formula.

How many molecules of glucose, C6H12O6, can be "burned" biologically when 283.2 grams of oxygen is a available?

Why does acids that has been accidentally spilled on a book cause the colour of the book cover and the ink to change?