Answer to Question #110488 in General Chemistry for Kaitlyn Hodgins

Question

1. what is the molar ratio of O2 to CO2?
2C3H6 + 9O2 = 6CO2 + 6H2O

2. If you had 12 moles of copper, how many moles of copper (I) oxide is produced?

3. If 15.0g of iron (iii) oxide is decomposed, how much iron will be produced?

Answer 1

1.The molar ratio of O2 and CO2 is 3:2

2. 2Cu -> Cu₂O; The molar ratio of Cu2O and Cu is 1:2, so for every 2 moles of Cu used, 1 mole of Cu2O are formed. n(Cu2O)=(1:2)*n(Cu)=12*0.5=6 mole;

3. Fe2O3 --> 2Fe; The molar ratio of Fe and Fe2O3 is 2:1;

n(Fe2O3)=m(Fe2O3)/Mr(Fe2O3)=15/160=0.09375 mole;

n(Fe)=(2:1)*0.09375=0.1875