Molar mass question2

Question

How many liters of water are formed from 55 L of oxygen

C₆H₁₂O₆ + 6O₂ --> 6CO₂ + 6H₂O

(Answer needs 2SF)

Answer 1

How many liters of water are formed from 55 L of oxygen?

C₆H₁₂O₆ + 6O₂ --> 6CO₂ + 6H₂O

First you have to convert liters of oxygen to moles of oxygen:

55L O₂ / 22.4L = 2.46 mol O₂

Second you have to convert moles of oxygen to moles of water:

2.46 mol O₂ x (6 mol H₂O / 6 mol O₂) = 2.46 mol H₂O

Third you have to convert moles of water to liters of water:

2.46 mol H₂O x (1 L / 55.55 mol H₂O) = 0.044 L H₂O

Answer:

0.044 liters of water are formed from 55 liters of oxygen.

**Notes:

1. The 22.4L is used whenever converting from liters of gas to moles of gas.
2. The coefficients of 6 in part two comes from the balanced chemical equation.
3. The 55.55 mol in part 3 comes from the fact that liquid water contains 55.55 mol/L.
4. I would double check to make sure the math was done correctly before handing in.