Given 10 grams of c2h4 , what masses of carbon dioxide and water are produced

Question

Given 10 grams of c2h4 , what masses of carbon dioxide and water are produced

Answer 1

First, write a correctly balanced equation:

C₂H₄ + 3O₂ ===> 2CO₂ + 2H₂O

Find moles of reactant and moles of products (assuming oxygen is not limiting):

moles C₂H₄ = 10 g x 1 mole/28g = 0.357 moles C₂H₄

moles CO₂ = 0.357 moles C₂H₄ x 2 moles CO₂/mole C₂H₄ = 0.714 moles CO₂

moles H₂O = 0.357 moles C₂H₄ x 2 moles H₂O/mole C₂H₄ = 0.714 moles H₂O

Convert moles to grams:

0.714 moles CO₂ x 44 g/mole = 31.4 g CO₂ = 30 g CO₂ (to 1 significant figure)

0.714 moles H₂O x 18 g/mole = 5.7 g H₂O = 6 g H₂O (to 1 significant figure)