AP Chemistry Unit 1 Review
Authored by Cynthia Hofferth
Chemistry
11th - 12th Grade
NGSS covered
Used 470+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The average atomic mass rhenium, Re, is 186.21 amu. If 37.1% of rhenium has mass# = 185, what is the other stable isotope?
Tags
NGSS.HS-PS1-8
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is the empirical formula if you have 36.84% nitrogen and 63.16% oxygen?
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A 5.00 g sample of a compound consisting of calcium and chlorine contains 1.82 g of calcium and 3.23 g of chlorine. What is the empirical formula?
CaCl2
Ca2Cl4
Ca2Cl2
Ca4Cl2
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
How many molecules are in 2.5 mol of NaCl?
1.5 x 1024 molecules
1.5 molecules
4.15 molecules
1.5 x 1023 molecules
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which pair has the same empirical formula?
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the molecular formula if the empirical formula is C2H5 and the molecular molar mass is 58.14 g/mol?
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What would be the mass of 1.5mol H2O
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