WorksheetsUnit 7 Exam Review
Total questions: 20
Worksheet time: 1hrs 8mins
How many moles in 15.9 g of carbon?
1.32 moles
5.9 moles
0.644 moles
2.28 moles
How many moles in 358g of CO₂?
8.13 moles
25.68 moles
55.2 moles
2.67 moles
How many moles in 96.2g of MgSO₄?
32.46 moles
0.799 moles
2.97 moles
6.41 moles
What is the mass of in 2.56 moles of sodium?
66.89 grams
1.72 grams
0.113 grams
58.9 grams
What is the mass of 2.98 mol CCl₄?
4.67 grams
458 grams
1.56 grams
141 grams
What is the mass of 3.21 mol MgSO₄?
231 grams
2.58 grams
386 grams
137 grams
How many atoms are present in 1.00 mole of carbon (C)?
100 atoms
6.02x10²³ atoms
5.13x10²⁴ atoms
12.011 atoms
How many molecules are in 3.14 moles of H2O?
7.14x10²²
6.02x10²⁴
1.89x10²⁴
2.98x10²³
How many molecules are there in 3.77 moles of ethanol (C2H5OH)?
2.27x10²⁴
3.77x10²³
1.02x10²⁴
5.38x10²²
How many moles are there in 6.427 X 1024 molecules of oxygen, O2?
15.99 moles
6.021 moles
10.68 moles
1.91 moles
How many moles are present in 8.34x1024 formula units of CaCl2?
8.4 moles
13.9 moles
5.94 moles
3.692 moles
How many moles are there in 4.73 X 1023 molecules of sodium sulfate, Na2SO3?
1.87 moles
0.786 moles
10.6 moles
0.387 moles
How many grams are there in 2.54 x 1024 atoms of silver?
8.97 grams
4.22 grams
987 grams
455 grams
How many grams are there in 5.23 x 1022 molecules of N₂I₆?
602 grams
688 grams
68.6 grams
0.0869 grams
How many atoms in 864.7 grams of Carbon?
2.76 x 1025
4.334 x 1025
71.99 x 1023
6.02 x 1023
How many molecules are there in 666.7 grams of AlCl3?
4.99 x 1023
3.010 x 1024
1.69 x 1024
3.010 x 1023
What is the empirical formula for a compound that is 3.73% hydrogen, 44.44% carbon, and 51.83% nitrogen?
H2CN3
HCN
H3C4N5
N5C5H4
What's the percent by mass of hydrogen (H) in C6H12O6?
6.714%
2.89%
6.970%
8.236%
What's the empirical formula for a compound that is 66.61% titanium and 33.39% oxygen?
Ti2O3
TiO2
TiO
Ti7O3
Vinegar, a common household item, is used in cleaning, cooking, baking and meat preservation. Vinegar contains acetic acid, CH3COOH, which gives vinegar its sour taste and pungent smell. What is the percent composition of OXYGEN in acetic acid?
31.998%
53.28%
33.8%
0.5328%
