1. Approximately 80% of the mass of a human body consists of aqueoussolutions (spinal fluid, blood, etc.) These solutions areunsaturated salt solutions that are 0.21 M NaCl and have a densityof 1 g/mL. How many pounds of salt are present in an 180 lb adult?
2. Zinc dissolves in hydrochloric acid to yield hydrogengas:
Zn(s) + 2HCl(aq) ? ZnCl2(aq) + H2(g)
Calculate the mass of hydrogen gas produced when a 7.35 g chunk ofzinc dissolves in 500. mL of 1.200 M HCl?
3. Ammonium nitrite undergoes decomposition to produce only gases asshown below.
NH4NO2(s) ? N2(g) + 2H2O(g)
How many liters of gas will be produced by the decomposition of32.0 g of NH4NO2 at 525?C and 1.5 atm?