Please explain to me how to find molar ratios for this question: Given the balanced equation, 2 SO2 + O2 arrow 2 SO3, what is the molar ratio of O2 to SO3? (Points : 3)
2:1
1:2
2:2
2:3

Question

Please explain to me how to find molar ratios for this question: Given the balanced equation, 2 SO2 + O2 arrow 2 SO3, what is the molar ratio of O2 to SO3? (Points : 3)
       2:1
       1:2
       2:2
       2:3

anonymous · Answer

@aaronq

aaronq · Answer

the molar ratio is the number (i.e. fraction) the stoichiometric of the substances you're comparing make.

$2 SO_2+O_2→2 SO_3$

$SO_2:O_2   $   is 2:1
  $  O_2:SO_3 $ is 1:2
$SO_2:SO_3$ is 2:2 or 1:1