Chemistry Spring Semester Exam 23-24
Authored by Jennifer Bradley
Chemistry
11th Grade
Used 5+ times
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80 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the total number of atoms in 1 mole of NH₃?
17.04 atoms
2 atoms
6.02X10²³ atoms
1.03X10²⁵ atoms
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the molar mass of C₂H₆?
30.08 g/mol
31 moles
13.02 g
6.02X10²³ molecules
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the mass of Oxygen if you have 4 moles of Oxygen? (Reminder this is a diatomic element)
60 g/mol
135 g/mol
128 g/mol
71 g/mol
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the number of moles in 25 grams of CaCO₃?
1 mole
2 mole
0.1 mole
0.2 mole
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the percent by mass of carbon in acetone, C3H6O?
20.7%
30.0%
1.61%
62.1%
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Calculate the percent composition of calcium acetate, Ca(C2H3O2)2.
40.0% Ca; 48.0% C; 4.0% H; 64.0% O
25.4% Ca; 30.4% C; 3.8% H; 40.5% O
25.0% Ca; 25.0% C; 4.5% H; 45.5% O
21.1% Ca; 30.0% C; 7.8% H; 42.1% O
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What calculations can you perform if you know the molar mass of a compound?
Converting moles of a compound to grams
Converting grams of the compound to moles
Both A and B
Neither A nor B
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