7. Assume that you have collected 867 L of nitrogen gas at STP. What is the mass of the nitrogen gas?

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

Which of the following elements would you expect to have the lowest ionization energy value? fluorine, lithium, neon, nitrogen

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1