Propane gas, C3H8, reacts with oxygen to produce water and carbon dioxide. C3H8(g)+5O2(g)→3CO2(g)+4H2O(l) How many moles of CO2 form when 3.80 mol of C3H8 completely reacts?
(A) 3.80 mol
(B) 7.60 mol
(C) 11.40 mol
(D) 15.20 mol
Answer:
To determine the number of moles of CO2 formed when 3.80 mol of C3H8 completely reacts, we can use the balanced chemical equation:
C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l)
From the equation, we can see that for every 1 mole of C3H8, we get 3 moles of CO2. Therefore, we can set up a proportion to solve for the number of moles of CO2:
(3 moles CO2 / 1 mole C3H8) = (x moles CO2 / 3.80 moles C3H8)
Cross-multiplying the equation, we get:
3 moles CO2 * 3.80 moles C3H8 = 1 mole C3H8 * x moles CO2
11.40 moles CO2 = x moles CO2
So, when 3.80 mol of C3H8 completely reacts, we will have 11.40 mol of CO2 formed.
Therefore, the correct answer is option (C) 11.40 mol.
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