For the reaction CwHxOyNz + O2 ———-> CO2 + H2O + NO2
12.363g 22.357g 10.57g 7.79g
Determine the empirical formula of the unknown gas

Iknow the answer is a but i don't know why

Which formula equation represents the burning of sulfur to produce sulfur dioxide? s(s) + o2(g) 4502(9) 2h2s(s) + 302(g) —> 2h20(0) + 2502(9) 4fes2+1102 —> 2fe2o3 + 8502 2802(g) + o2(9) v205 , 2503(9)

Why must humans find substitutes for many minerals found on earth? (a) form at an extremely slow rate (b) controlled by other countries (c) too deep in the earth to collect