Last modified: Wed 08/27/2014 03:52:54 pm
<div align="center"> <h3>ACA</h3> </div>

Oklahoma State University

It is OK to use your textbook or lecture notes from class, but if you can answers the questions without it that is OK too.

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Answer all of the questions below. If you do not know an answer enter CNA. However, it will help me the most if you answer each question with your best intuition/idea about what would be a reasonable answer.


First Name:

Last Name:

Laboratory Section:

1. What are the products of the combustion of butane (C4H10)?

C4H10(g) + O2(g) ----> +

2. Where does all the carbon, that starts in butane (the reactants), go when the combustion is complete?

3. What is the percent composition of carbon in C4H10?
%

4. How many grams of carbon (C) are in a 4.00 gram sample of C4H10?
grams

 

5. When 4.00 grams of C4H10 are combusted in oxygen, 12.1 grams of CO2 are formed. How many grams of carbon are in 12.1 grams of CO2?
grams


6. When 1.005 g of an unknown hydrocarbon are combusted 3.050 g of CO2 and 1.560 grams of H2O formed. Answer the following questions.

a) How many grams of carbon are in 3.050 g of CO2?

grams

b) How many moles of carbon are in 3.050 g of CO2?

mol

c) How many grams of hydrogen are in 1.560 g of H2O?

grams

d) How many moles of hydrogen are in 1.560 g of H2O?

mol

e) We now assume that the moles of carbon in CO2 are equal to the moles of carbon in the unknown hydrocarbon, and the moles of hydrogen in H2O are equal to the moles of hydrogen in unknown carbon. Complete the table below.

moles C

mole H

f) Determine the ratio of the moles, and enter the formula of the unknown hydrocarbon.

7. Is there anything about the questions that you feel you do not understand? List your concerns/questions.

8. If there is one question you would like to have answered in lecture, what would that question be?