Carbon dioxide (co2) is the gas that is mainly responsible for global warming (the greenhouse effect). the burning of fossil fuels is a major cause of the increased concentration of co2 in the atmosphere. carbon dioxide is also the end product of metabolism (see sample problem 3.4). using glucose as an example of food, calculate the annual human production ofco2ingrams, assuming that each person consumes 5.0×102g of glucose per day, that the world's population is 6.5 billion, and that there are 365 days in a year.

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.)