A sample of water contains 5.24x10^22 molecules. How many moles are in this sample?

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)

The movement of tectonic plates and in two locations is described below: location a: tectonic played push together location b: tectonic plates push apart

Silver reacts with oxygen to produce silver oxide. (write balanced chemical equation and identify type of chemical reaction.)