Which of the following is the number of hydrogen atoms in a mole of hydrogen gas at STP?
a) 224
b) 6,02 x 1023
c) 1,20 x 1024
d) 2.016
e) 1.008

Answer///precipitate;

I’m really not sure what’s the answer. sorry

Iron reacts with oxygen in a chemical hand-warmer. how should this reaction be categorized? the correct answer is: a). as an exothermic process because it releases heat