I need help with the following:
**EP 3.14** Propane, C₃H₈, is a common fuel used for cooking and home heating. What mass of O₂ is consumed in the combustion of 1.00 g of propane?
a. 5.00 g
b. 0.726 g
c. 2.18 g
d. 3.63 g
Propane, C₃H₈, is a hydrocarbon. In its complete combustion, the second reactant is O₂, and the products are CO₂ and H₂O.
First, write and balance the equation:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
Now check what is given and what is required.
We are given 1.00 g of propane, and we need to calculate the mass of O₂ consumed.
So, here is the plan:
grams of C₃H₈ → moles of C₃H₈ → moles of O₂ → grams of O₂
First, convert grams of propane to moles using its molar mass. Then convert moles of propane to moles of oxygen using the mole ratio from the balanced equation. Finally, convert moles of oxygen to grams using the molar mass of O₂.
The dimensional-analysis setup is:
dimensional analysis .png
All the intermediate units cancel, leaving the desired unit, grams of O₂.
3.63,g,O2
Since 1.00 g has three significant figures, the final answer should also be reported to three significant figures.
Thank you so much Uma mam