Using the balanced equation for the combustion of ethylene (C2H4), answer the following questions.

Question

C2H4 + 302 - 2CO2 + 2H20

Be sure each of your answer entries has the correct number of significant figures.

Part 1 of 2

10

How many grams of CO2 are formed from 7.5 mol of C2H4?

g CO2

X

Part 2 of 2

How many grams of H2O are formed from 0.84 mol of C2H4?

g H2O

10

Answer 1

Part 1:

7.5 mol C2H4 x (2 mol CO2 / 1 mol C2H4) x (44.01 g CO2 / 1 mol CO2) = 660.225 g CO2

Therefore, 660 g CO2 are formed from 7.5 mol of C2H4.

Part 2:

0.84 mol C2H4 x (2 mol H2O / 1 mol C2H4) x (18.015 g H2O / 1 mol H2O) = 30.51 g H2O

Therefore, 30.51 g H2O are formed from 0.84 mol of C2H4.