Question in the description please help

Question

question in the description

2 C2H6 + 7 O2 → 4 CO2 + 6 H2O

1. Is the reaction equation balanced?
2. If you start with 2 moles of C2H6 how many moles of water do you make?
3. What is the molar mass of C2H6?
4. How many moles of C2H6 are in 60g of C2H6?
5. HOw many moles of H2O can the above C2H6 produce if it reacts completely?
6. How many gram of H2O is the above answer?
7. How many grams of O2 is required to react with the 60g C2H6?
8. How many grams of CO2 are supposed to be made?
9. What is the percent yield if you actually make 150g CO2?

Answer 1

2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O

1. Yes
2. According to the balanced reaction, 2 moles of C₂H₆ produce 6 moles of H₂O
3. Molar mass of C₂H₆ = (12 * 2) + (1 * 6) = 24 + 6 = 30 g/mol
4. Moles = mass/molar mass = 60/30 = 2 moles C₂H₆
5. 2 moles of C₂H₆ will produce 6 moles of H₂O (see the answer to 2)
6. Mass = moles * molar mass = 6 mol * 18 g/mol = 108 g
7. In order to react with 2 moles C₂H₆, we need 7 moles of O₂. Mass of O₂ = 7 mol * 32 g/mol = 224 g
8. 2 moles of C₂H₆ produce 4 moles of CO₂. Mass of CO₂ = 4 mol * 44 g/mol = 176 g
9. Percent yield = actual yield/theoretical yield * 100% = 150g/176g * 100% = 85.23%