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QR Challenge: Chemistry Unit 6 Review

Created using the ClassTools QR Treasure Hunt Generator

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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. Determine the molar mass of the scent of garlic: (C3H5)2S114.21 g/mol
2. How many moles are in 100 g of Dinitrogen oxide?2.27 mol
3. What is the % composition of each element in caffeine? (C8H10N4O2)49.47%C, 5.191%H, 28.86% N, 16.48%O
4. Explain how the mole, molar mass and Avogadro's number are related?The mass of 6.02 X 1023 particles of a substance is the molar mass.
5. How many particles are in 9.56 mol of Zn?5.76X1024
6. How many moles are in 3.25 X 1020 atoms of lead?5.39 X 10-4
7. A leaf has 1.5 X 10-5 mol of chlorophyll. How many particles is this?9.03 X 1018
8. A compound has 3.86 g of sulfur and 4.08 g of vanadium. How many atoms of each are there?7.25 X 1022 atoms S, 4.82 X 1022 atoms V
9. 7.65 g of Co is how many moles?.130 mol
10. What is the difference between an empirical and a molecular formula?Empirical formula is simplest ratio.
11. What information do you have to have to find the molecular formula of a compound?%composition and molar mass
12. List the steps needed to find the empirical formula of a compound?write % as grams, convert grams to moles, compare the ratios, write the simplest ratios
13. Calculate the empirical formula of a compound with 69.58% Ba, 24.32 %O, 6.09%C.BaCO3
14. How many grams are in 0.0550 mol of As?4.12 g
15. Which has more atoms, 10 g of C or 10 g of Ca? How many atoms does each have?5.01 X 1023 atoms C, 1.50 X 1023 atoms Ca (Carbon)
16. A colorless liquid composed of 46.68% N and 53.32% O has a molar mass of 60.01 g/mol. What is the molecular formula?N2O2

 


Chemistry Unit 6 Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=Determine_the_molar_mass_of_the_scent_of_garlic:__(C3H5)2S

Question 1 (of 16)

 


Chemistry Unit 6 Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=How_many_moles_are_in_100_g_of_Dinitrogen_oxide?

Question 2 (of 16)

 


Chemistry Unit 6 Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_the_%_composition_of_each_element_in_caffeine?_(C8H10N4O2)

Question 3 (of 16)

 


Chemistry Unit 6 Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=Explain_how_the_mole,_molar_mass_and_Avogadro's_number_are_related?

Question 4 (of 16)

 


Chemistry Unit 6 Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=How_many_particles_are_in_9.56_mol_of_Zn?

Question 5 (of 16)

 


Chemistry Unit 6 Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=How_many_moles_are_in_3.25_X_1020_atoms_of_lead?

Question 6 (of 16)

 


Chemistry Unit 6 Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=A_leaf_has_1.5_X_10-5_mol_of_chlorophyll.__How_many_particles_is_this?

Question 7 (of 16)

 


Chemistry Unit 6 Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=A_compound_has_3.86_g_of_sulfur_and_4.08_g_of_vanadium.__How_many_atoms_of_each_are_there?

Question 8 (of 16)

 


Chemistry Unit 6 Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=7.65_g_of_Co_is_how_many_moles?

Question 9 (of 16)

 


Chemistry Unit 6 Review: QR Challenge

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

Question 10 (of 16)

 


Chemistry Unit 6 Review: QR Challenge

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

Question 11 (of 16)

 


Chemistry Unit 6 Review: QR Challenge

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

Question 12 (of 16)

 


Chemistry Unit 6 Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=Calculate_the_empirical_formula_of_a_compound_with_69.58%_Ba,_24.32_%O,_6.09%C.

Question 13 (of 16)

 


Chemistry Unit 6 Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=How_many_grams_are_in_0.0550_mol_of_As?

Question 14 (of 16)

 


Chemistry Unit 6 Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=Which_has_more_atoms,_10_g_of_C_or_10_g_of_Ca?__How_many_atoms_does_each_have?

Question 15 (of 16)

 


Chemistry Unit 6 Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=A_colorless_liquid_composed_of_46.68%_N_and_53.32%_O_has_a_molar_mass_of_60.01_g/mol.__What_is_the_molecular_formula?

Question 16 (of 16)