In order to produce CO2, a student put a sample of calcium carbonate in a flask and added hydrochloric acid using the following equation: CaCO3 + 2HCl → H2O + CO2 + CaCl2

The student finds the mass of CO2 generated in the lab to be 100 g. If the student began with 200 g of HCl and excess CaCO3 , what was the percent yield of CO2 ?

Identify two types of chemical bonding in the source of dietary potassium

Asample of air with a volume of 2.20m3 at a pressure of 105 kpa and a temperature of 30c is cooled to 10c and the pressure is reduced to 75.0 kpa. what is the new volume? 6.9 1.34 2.56 43.0 2.88

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.)