Problem Set 3 (PDF)
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Author: Robert Bauer
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Chemistry Lesson: Steemit Edition Problem Set 3
1.) How many neutrons are present in 54
24𝐶𝑟 ? (refer to Chemistry Lesson: Part 3 if you do not
remember how to determine that)
2.) What is the empirical formula for a compound with the following composition: 54.5% C, 13.7%
H, and 31.8% N? (Bonus: the molecular mass of this compound is ~88 g/mol, the first person to
post the correct molecular formula and name of the compound in the comments of Chemistry
Lesson: Part 4 will get 5 SBD as a reward).
3.) Balance the following chemical reaction: Al + H2SO4 Al2(SO4)3 + H2
This is the reaction of aluminum with concentrated sulfuric acid, if you are curious what this
reaction looks like see the following YouTube video (it’s NOT a crazy one):
(https://www.youtube.com/watch?v=vR2ivraWTyU)
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