1. Consider that 250. mL of H2 gas was produced at a pressure of 1.0 atm and a temperature of 25oC (NOT STP conditions!). How many moles of HCl reacted? Mg(s) + 2 HCl(aq) H2 (g) + MgCl2(aq) 2. How many grams of propane (C3H8) will react with 3.29 L of O2 at 1.05 atm and -34˚C?

Below are the answers:

1.b - cfcs
2.d - carbon dioxide,smog,acid rain. 
3.a -  laws and treaties that limit or ban pollutants
4.c - burning leaves and brush

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