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Homework answers / question archive / CH110/120 Assignment #2 Version A General Instructions Due Date: September 29, 2020, 11:59 pm in the folder on Gradescope that corresponds to your version of the assignment
CH110/120 Assignment #2 Version A General Instructions
Due Date: September 29, 2020, 11:59 pm in the folder on Gradescope that corresponds to your version of the assignment.
Late assignments will not be accepted. You cannot submit your assignment by emailing your professor. It is your responsibility to follow the assignment instructions before the due date and time.
You should answer questions using the formatting that has been provided. There several ways that you could do this:
Academic Integrity
It is expected that all students will follow assignment instructions and will adhere to Laurier’s regulations with respect to Academic Integrity.
The following violate Laurier’s Academic Code of Conduct:
Your course instructor takes academic integrity seriously (because in science, it can have serious consequences for many people). If you have questions about how to conduct yourself when completing course assessments, you should contact your course instructor for guidance.
Specific Assignment Instructions:
0.123 mol/L = 0.009 mol/L (this means that 1, 2 and 3 refer to the 1^{st}, 2^{nd}, and 3^{rd} digits in your student number)
0.456 mol/L = 0.820 mol/L(this means that 4, 5 and 6 refer to the 4^{th}, 5^{th}, and 6^{th} digits in your student number)
7.89 x 10^{2} mL = 8.64 x 10^{2} mL (this means that 7, 8 and 9 refer to the 7^{th}, 8^{th}, and 9^{th} digits in your student
number)
If you do not understand this instruction, email your instructor with your student number and the version of your assignment, and your course instructor with clarify these requirements.
Value: 6.5% of your final grade
Q1) Boron is isolated from its oxide ore by a twostep industrial process. Step one is the reaction of B_{2}O_{3}(s) with charcoal (C(s)) and chlorine gas, as follows:
B_{2}O_{3}(s) + C(s) + Cl_{2}(g) à BCl_{3}(l) + CO(g)
(a) Write the balanced molecular reaction. Include phases.
(b) Assume that excess carbon is present. 0.456 g of B_{2}O_{3} reacts with 7.89 L of Cl_{2}(g) at standard temperature and pressure. The products are collected at 23.2 ^{o}C with a pressure of 1.03 bar. What volume of CO(g) is produced?
(c) If 1.00 L of CO(g) are collected, what is the percent yield for this reaction? State one reason why your percent yield is greater than or less than 100%.
Your student number 

Problem solving strategy 
Problem solving 


State one learning outcome achieved from this activity. 

Q1=4 points Insert extra pages if required.
Q2) (a) How many molecules of CO_{2} are in a 500.0 mL container at 789 mmHg and 123 ^{o}C?
Q2) (b) What is the rootmeansquare speed of the particles in in the flask for part (a)?
Q2) (c) Using NH_{3}, B_{2}F_{4}, C_{3}H_{6} and He gases fill in the following table based on the provided graph.
(Note that this graph should be considered a generalization. A quantitative representation would have to account for actual temperature and type of gas. It has been adapted from https://chem.libretexts.org/ under a CC BYNCSA 3.0 license. If you have difficulty seeing the colours on the graph, contact your course instructor.)
Curve 
Your Gas 
One or two sentence justification for your assignment. 
A 


B 


C 


D 

Q2=2.5 points Insert extra pages if required.
Integrity Pledge
“I affirm that I have not given or received any unauthorized help on this assignment, and that this work is my own.”
Rewrite the above statement in the following box and then sign and date below.

__________________________________________ _______________________
Signature Date
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