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Moles And Molarity
Test Description: Practice Solving Moles and Molarity Math Problems
Instructions: Answer all questions to get your test result.
1) What is the molar mass of CuFeS2?
A
184 g
B
152 g
C
3.07 X 10^24 g
D
1.108 X 10^26 g
2) How many moles of CH4 are in 1.2 x 10^26 molecules?
A
1.99 moles
B
7.5 x 10^24 moles
C
7.224 x 10^49 moles
D
199.34 moles
3) What was the molarity of a solution containing 4.5 moles of NaCl in 100 ml?
A
45 M
B
0.776 M
C
0.045 M
D
0.078 M
4) How many grams of NiCl2 are in 2.56 moles?
A
99g
B
1.54 x 10^24 g
C
253.44 g
D
0.026 g
5) How many grams of KCO3 are needed to make a 22.4 M solution within 3.6 L?
A
0.81 grams
B
99 g
C
80.64 moles
D
7983.36 g
6) How many ml of solution are needed to make a 5.78 M solution with 2.98 moles of CaO?
A
0.0532 ml
B
53.2 ml
C
0.52 ml
D
520 ml
7) How many grams are needed to make 8.3 moles of C12H22O11?
A
2838.6 grams
B
4.997x10^24 grams
C
1.38 x 10^-23 grams
D
41.20 grams
8) How many formula units are in 9.6 moles NH4CO3?
A
0.12 formula units
B
748.8 formula units
C
1.59 x 10^-23 formula units
D
5.78 x 10^24 formula units
9) How many moles of Al2Cl3 are needed to creat a 6.7 M solution using 400ml of water?
A
426.12 grams
B
2680 moles
C
2.68 moles
D
0.0168 moles
10) You have 35.2 g of barium hydroxide Ba(OH)2. How many moles is that?
A
0.21 mol
B
5.847 x 10^-23 mol
C
2.119 x 10^25 mol
D
6019.2 mol
*select an answer for all questions
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