Q1: What process transforms energy in both fossil fuels and fuel cells?

Q2: Do fossil fuels or fuel cells produce less pollution in the process in the question above?

The answer for #3 is c but i don't know why

What must occur for air masses to form fronts

Each of the following reactions is allowed to come to equilibrium and then the volume is changed as indicated. predict the effect (shift right, shift left, or no effect) of the indicated volume change. drag the appropriate items to their respective bins. co(g) + h2o(g) < => co2(g) + h2(g) (volume is decreased) pcl3(g) + cl2(g) < => pcl5(g) (volume is increased) caco3(s)< => cao(s) + co2(g) (volume is increased)