The answer is 20 you do multiplication first then the division, add what both the numbers that you got. Then subtract 37 and you get 20
Carbon Dioxide: o2c
Water: h2o
Oxygen: o2
Water is h2o because there are 2 hydrogen molecules and 1 oxygen molecule.
h2 = 2 hydrogen molecules
o = 1 oxygen molecule
To find the biggest or close number say 70 is close to 75 or 70 the answer would be 70 I think but not sure
