HELP! I don't know how to solve this question and I'd really like a step-by-step explanation for it!

Weigh out 69.5 g of the compound which is 58.6 percent (m/m) oxygen. Dissolve it in 100 g of water. Report back the % (m/m) solution this makes.

Esign techniques and materials that reduce the negative environmental impact of a structure are referred to as

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?

What type of matter is made of only one kind of atom