How molecules of CO2 (g) are produced when 0.75 moles of propane are burned? Chemical reaction:...

Question

Question

How molecules of CO2 (g) are produced when 0.75 moles of propane are burned? Chemical reaction: C3H8 + 5O2 à 3CO2 + 4H2O

Answer 1

Answer #1

moles C₃H₈ consumed = 0.75 mol

moles CO₂ produced = (moles C₃H₈ consumed) * (mole ratio of CO₂ to C₃H₈)

moles CO₂ produced = (0.75 mol) * (3 mol CO₂ / 1 mol C₃H₈)

moles CO₂ produced = (0.75 mol) * (3)

moles CO₂ produced = 2.25 mol

molecules CO₂ produced = (moles CO₂ produced) * (Avogadro's number)

molecules CO₂ produced = (2.25 mol) * (6.022 x 10²³ molecules/mol)

molecules CO₂ produced = 1.355 x 10²⁴ molecules

molecules CO₂ produced = 1.4 x 10²⁴ molecules (correct number of significant figures)

Answer 2

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