Question

If 16 grams of o2 react with excess c2h6, how many grams of co2 will be formed?

Answer 1

First the balanced equation is

C2H6+7/2O2=>2CO2+ 3H2O

Write no of moles from equation

7/2 mol of O2 produced 2 mol of CO2

Substitute mols by molecular mass

3.5 mol × 32 = 2 mol × 44

Mass of sample

16 gm = ????

Mass of co2

16× 88 ÷ 112 = 12.5 gm

Answer 2

Answer:

13 grams of CO2

Explanation:

2C2H6+7O2→4CO2+6H2O

First of all calculate moles of oxygen,

n=16/32

n=0.5

Now equates moles of oxygen with moles of carbon dioxide;

nO2/7=nCO2/4

0.5/7=nCO2/4

0.5*4/7=nCO2

0.3=nCO2

Now,we have moles and molar mass of CO2 and it is easy to calculate mass of CO2

nCO2=mass/molar mass

0.3=mass/44

0.3*44=m

13g=m

Hope you understood:)