There is a power plant in Portland, Oregon that is very concerned about global warming. This plant takes all of its exhaust gases from its boilers and recycles the CO2 using the Solvay process to make sodium hydrogen carbonate. The reaction is shown below. NH3(g) + H2O(l) + CO2(g) + NaCl(aq) → NaHCO3(aq) + NH4Cl(aq)

How many liters each of NH3 and CO2 (both at STP) are needed to make 3.00 kg of sodium bicarbonate?

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)