The reaction of 68.2 gram of O2 with excess of C4H8O produced 27.9 grams of H2O. What is the percent yield if 25.8 g of H2O was actually produced in the lab?

Enough of a monoprotic weak acid is dissolved in water to produce a 0.0172 m solution. if the ph of the resulting solution is 2.39 at 20 °c, determine the pka for the acid.

What diagram shows the ionic compound of magnesium oxide

What forms when chemical reactions combine pollution with sunlight?