## Test #1 Question 6 Part B [ENDORSED]

Nabeeha Khan 1D
Posts: 30
Joined: Fri Apr 06, 2018 11:03 am

### Test #1 Question 6 Part B

Question: CO + 2O2 --> CO2+ O3

A) if a car releases 100g of CO in a garage containing 100g O2, what is the limiting reactant?

B) what mass of reactant will be leftover?

So I understand how to find the limiting reactant and I found that it was O2 in this problem that was limiting, but I am unsure of how to calculate the mass of reactant that is leftover for Part B of this question. Does anyone know what the correct answer for part B would be?

Surya Palavali 1D
Posts: 24
Joined: Fri Apr 06, 2018 11:04 am

### Re: Test #1 Question 6 Part B  [ENDORSED]

The mass of leftover reactant is just the mass of the non-limiting reactant that remains when the limiting reactant has been used up.

Caitlyn Ponce 1L
Posts: 30
Joined: Fri Apr 06, 2018 11:04 am
Been upvoted: 1 time

### Re: Test #1 Question 6 Part B

Since O2 is the limiting reactant, that means that CO is in excess. To calculate the mass of reactant leftover, you can subtract the moles of CO present in the reaction with the moles of CO required to react with 100g O2. Then convert the moles to grams.