# How many grams of oxygen wil be in two moles of potassium dichromate?

224 g are in two moles of potassium dichromate.

### How do you prepare 0.1 N Potassium dichromate?

You take 0.05 moles of potassium dichromate and dissolve it in a liter of water. Or, alternatively, 0.1 moles of potassium dichromate and dissolve it in two liters of water. (Properly speaking, you should dissolve it to make one or two liters of solution, but the difference is going to be negligible).

### How many grams are in 3.3 moles of potassium sulfide?

The atomic mass of Potassium is 39 and that of Sulfur 32. The formula for Potassium Sulfide is K2S therefore the molecular weight of Potassium Sulfide is (39 * 2) + 32 = 110. Therefore one mole of Potassium Sulfide weighs 110 grams. Therefore 3.3 moles of Potassium Sulfide weigh 110 * 3.3 = 363 grams.