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QR Challenge: Molar Mass Calculations

Created using the ClassTools QR Treasure Hunt Generator

Teacher Notes

A. Prior to the lesson:

1. Arrange students into groups. Each group needs at least ONE person who has a mobile device.

2. If their phone camera doesn't automatically detect and decode QR codes, ask students to

3. Print out the QR codes.

4. Cut them out and place them around your class / school.


B. The lesson:

1. Give each group a clipboard and a piece of paper so they can write down the decoded questions and their answers to them.

2. Explain to the students that the codes are hidden around the school. Each team will get ONE point for each question they correctly decode and copy down onto their sheet, and a further TWO points if they can then provide the correct answer and write this down underneath the question.

3. Away they go! The winner is the first team to return with the most correct answers in the time available. This could be within a lesson, or during a lunchbreak, or even over several days!


C. TIPS / OTHER IDEAS

4. A detailed case study in how to set up a successful QR Scavenger Hunt using this tool can be found here.


Questions / Answers (teacher reference)

Question

Answer

1. Cl2 71 g/mol
2. KOH 56.1 g/mol
3. BeCl2 80 g/mol
4. FeCl3 162.3 g/mol
5. BF3 67.8 g/mol
6. CCl2F2 121 g/mol
7. Mg(OH)2 58.3 g/mol
8. UF6 352 g/mol
9. SO2 64.1 g/mol
10. H3PO4 98 g/mol
11. (NH4)2SO4 132.1 g/mol
12. CH3COOH 60 g/mol
13. Pb(NO3)2 331.2 g/mol
14. Ga2(SO3)3 379.7 g/mol

 



Molar Mass Calculations: QR Challenge

https://www.classtools.net/QR/decode.php?text=Cl2

Question 1 (of 14)

 



Molar Mass Calculations: QR Challenge

https://www.classtools.net/QR/decode.php?text=KOH

Question 2 (of 14)

 



Molar Mass Calculations: QR Challenge

https://www.classtools.net/QR/decode.php?text=BeCl2

Question 3 (of 14)

 



Molar Mass Calculations: QR Challenge

https://www.classtools.net/QR/decode.php?text=FeCl3

Question 4 (of 14)

 



Molar Mass Calculations: QR Challenge

https://www.classtools.net/QR/decode.php?text=BF3

Question 5 (of 14)

 



Molar Mass Calculations: QR Challenge

https://www.classtools.net/QR/decode.php?text=CCl2F2

Question 6 (of 14)

 



Molar Mass Calculations: QR Challenge

https://www.classtools.net/QR/decode.php?text=Mg(OH)2

Question 7 (of 14)

 



Molar Mass Calculations: QR Challenge

https://www.classtools.net/QR/decode.php?text=UF6

Question 8 (of 14)

 



Molar Mass Calculations: QR Challenge

https://www.classtools.net/QR/decode.php?text=SO2

Question 9 (of 14)

 



Molar Mass Calculations: QR Challenge

https://www.classtools.net/QR/decode.php?text=H3PO4

Question 10 (of 14)

 



Molar Mass Calculations: QR Challenge

https://www.classtools.net/QR/decode.php?text=(NH4)2SO4

Question 11 (of 14)

 



Molar Mass Calculations: QR Challenge

https://www.classtools.net/QR/decode.php?text=CH3COOH

Question 12 (of 14)

 



Molar Mass Calculations: QR Challenge

https://www.classtools.net/QR/decode.php?text=Pb(NO3)2

Question 13 (of 14)

 



Molar Mass Calculations: QR Challenge

https://www.classtools.net/QR/decode.php?text=Ga2(SO3)3

Question 14 (of 14)