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WorksheetsOptional review for the moles quiz
Total questions: 90
Worksheet time: 4hrs 12mins
A sample of gold contains 1.23 x 1023 atoms. How many moles of gold are present?
2.05 x 1047 moles
0.204 moles
0.123 moles
20.5 moles
How many atoms are present in a 0.035 mole sample of silver?
0.35 atoms
2.1 x 1023 atoms
5.9 x 10-25 atoms
7.0 atoms
Calculate the mass of iron in a sample of iron ore containing 2.61x1023 iron atoms. The mass of iron is (a) .
Calculate the number of gold atoms in a 2.00 mole sample of gold.
1.20x1024
1.50x1023
2.41x1024
3.01x1023
How many moles of helium are in a 26.0 g balloon?
The balloon alone has a mass of 24.0 g.
0.15
0.50
0.35
0.045
What is the mass of one mole of nitrogen gas?
48 g/mol
14 g/mol
28 g/mol
12 g/mol
Which of the following would have the greatest mass:
1 mole C, 1 mole Ag, or 1 mol Al?
1 mole C
1 mole Al
1 mole Ag
All three samples have the same mass
How many moles are present in a 18 g sample of carbon?
0.5 mol
1.0 mol
1.5 mol
2.0 mol
One mole of carbon dioxide contains
(a) molecules.
1.87 X 10-24
180
1,000,000,000,000
44
How many moles are present in a 25 g sample of sodium? Report your answer with an appropriate number of significant figures.
(a)
How many grams of argon are in 0.5 moles?
10g
20.g
40g
How many moles of sulfur are in 480 grams?
0.15 mol
15 mol
1.5x101 mol
A mass of 6.0 g of carbon contains
1.0 mole of C
2.0 moles of C
0.50 moles of C
How many grams are in 8.50 moles of chromium?
45.0 g
442 g
0.180 g
3.70 g
There are (a) grams in 88.1 moles of magnesium.
There are (a) moles in 22 grams of argon.
There are (a) moles in 9.8 grams of calcium.
What is the mass of 2.0 x 1023 atoms of helium?
0.670 g
1.33 g
2.68 g
5.36 g
12.0 g
How many particles are there in 12.0 g of carbon?
3.0 x 1023 particles
6.0 x 1023 particles
9.0 x 1023 particles
12.0 x 1023 particles
You are given a diamond necklace for your birthday. Determine the number of carbon atoms in your necklace which has a mass of 0.200 grams.
1.00 x 1022 atoms C
1.2044 x 1024 atoms C
2.00 x 1045 atoms C
2 atoms C
What is the molar mass of chlorine gas? (Hint: What do you need to remember about elemental chlorine?)
35.453 g/mol
70.906 g/mol
17.5 g/mol
35.0 g/mol
What is the molar mass of ammonium sulfate, (NH4)2SO4? ?
114.09 g/mol
128.06 g/mol
118.34 g/mol
132.13 g/mol
What is the molar mass of ethanol, C2H5OH?
30.33 g/mol
133.27 g/mol
45.06 g/mol
45.07 g/mol
Calculate the molar mass of Ca(C2H3O2)2
158.2 g/mol
172.2 g/mol
182.2 g/mol
192.2 g/mol
The molar mass for Al(OH)3
is (a) g/mol
Calculate the molar mass of H2SO4
98.0 g/mol
100.0 g/mol
102.0 g/mol
104.0 g/mol
What is the mass of one mole of neon?
20 g
10 g
30 g
Cannot be determined
What is the molar mass of silver chloride? (Start with a correct formula!)
143.3 g/mol
107.9 g/mol
235.5 g/mol
180.7 g/mol
What is the molar mass of potassium oxide?
(Hint: start with a correct formula)
94.20 g/mol
71.10 g/mol
55.10 g/mol
27.00 g/mol
Calculate the molar mass of NaOH.
23.00 g/mol
39.99 g/mol
17.00 g/mol
80.00 g/mol
The molar mass of AgF is (a) .
Which of the following compounds has the highest molar mass?
CH4
O2
N2
CO2
Which has a greater mass: 1 mole of neon (Ne) or 2 moles of carbon (C)?
1 mole of neon
2 moles of carbon
both have the same mass
more information is needed.
What is the mass of 1 mole of sodium carbonate? (Start with a correct formula!)
105.99 g
106.00 g
84.07 g
105.98 g
Which has more moles:
12.01 grams of carbon (C), or 12.01 grams of silicon (Si)?
12.01 grams of carbon (C)
12.01 grams of silicon (Si)
Both samples have the same number of moles
More information is needed
One mole of helium has a mass of 4.0026 grams. What does 3.0 moles of helium weigh?
4.0026 g
2.0013 g
12.0078 g
120.078 g
Calculate the mass of 2.00 mols of CuSO4
159 g
319 g
79.7 g
63.5 g
What is the mass of .045 mols of FeCl2?
5.7 g
127 g
2800 g
7.6 x 1025²⁵ g
How many moles are in 3.75 g H2O?
0.208 mol
67.6 mol
4.81 mol
18.0 mol
What is the mass of .32 mols of CaCO3?
310 g
32 g
0.0032 g
3.0 kg
How many grams of copper, Cu, are in 2.53 moles?
159.5 g
63.5 g
161 g
25 g
What is the molar mass of UF4?
82 g/mol
314.02 g/mol
352 g/mol
214 g/mol
Calculate the molar mass of iron(III) oxide. Start with a correct formula!
56 g/mol
72 g/mol
159.7 g/mol
200 g/mol
What is the mass in grams of 3.45 mol C6H12?
.0410 g
24.4 g
412 g
290. g
What is the mass of 3.0 mol of nitrogen gas N2?
14 g
28 g
9.3 g
84 g
How many moles of water are in 3.130 x 1024 water molecules?
5.198
6.022 x 1023
3.130
8.638 x 10-24
What is the mass in grams of 4.50 mol of iron(III) chloride?
(Hint: start with a correct formula)
162 g
36.0 g
730. g
0.0278 g
What is the mass of 1.50 mol of carbon dioxide CO2?
29.3 g
66.0 g
0.0341 g
88.0 g
The molar mass of C6H8O6 is (a) g/mol.
How many atoms of carbon are in 3.00g of carbon?
3.01x1023atoms C
1.50x1023atoms C
6.02x1023atoms C
1.20x1024atoms C
How many atoms are in 2.00 moles of aluminum?
1.20 x 1024 atoms
3.01 x 1022 atoms
6.02 x 1023 atoms
4.00 x 1024 atoms
What is the molar mass of CH4 ?
16.04 grams per mole
12.01 grams per mole
1.008 grams per mole
14.01 grams per mole
Determine the molar mass of zinc oxide. (Start by writing a correct formula!)
81.35 g/mol
97.35 g/mol
146.70 g/mol
162.70 g/mol
Calculate the molar mass of C6H14.
86.18 g/mol
30.00 g/mol
56.12 g/mol
300.52 g/mol
There are ______atoms are in 2.5 moles of gold.
1.5 x 1024
5.0 x 1023
3.7 x 1024
2.3 x 1023
4.2 x 10-24
There are (a) atoms in 4.5 mol of Cu.
2.7x1024atoms Cu
1.5x1023atoms Cu
9.0x10-24atoms Cu
300atoms Cu
There are _____ atoms in 4.7 moles of copper, Cu.
6.02 x1023
2.82 x1025
5.65 x10-24
6.02 x 1024
There are (a) moles of methane (CH4) in 1.24 x 1023 molecules of methane.
How many total atoms of Cl are present in 0.00300 moles of Cl2?
1.81x1021
1.20x1024
0.00181
0.003
3.61 x 1021
How many water molecules are present in 4.7 moles of water?
2.8 x 1024
4.7
8.6 x 10-24
6.0 x 1023
How many atoms are in 0.0500 moles of magnesium?
3.01 x 1022 atoms
1.81 x 1046 atoms
5.00 x 1021 atoms
5.00 atoms
1.25 mole of copper is equal to how many atoms?
7.52 x 1024
6.02 x 1024
5.01 x 1024
3.11 x 1024
7.53 x 1023
4.22 x 1023 atoms of hydrogen is equal to (a) moles.
Calculate the molar mass for iron(III) hydroxide. (Start by writing a correct formula)
106.87 g/mol
56.85 g/mol
32.00 g/mol
79.90 g/mol
How many atoms are there in 3.5 x 10-4 moles of iron?
2.11 x 1020 atoms
5.67 x 1024 atoms
2.11 x 10-20 atoms
5.67 x 10-24 atoms
How many atoms of copper are there in 3.45 x 10-10 moles of copper?
2.08 x 1014 atoms
6.02 x 1023 atoms
2.08 x 10-13 atoms
6.02 x 10-23 atoms
Calculate the mass of iron in a sample of iron ore containing 2.61x1023 iron atoms. The mass of iron is (a) .
What is the total mass in grams of 1.5 mole of SO2?
32 g
48 g
64 g
96 g
A sample of silver contains 5.71 x 1022 atoms. How many moles of silver are present? (Enter your answer with 3 sig figs and no units)
(a)
What is the molar mass of magnesium hydroxide, Mg(OH)2? (Report your answer to the tenths place)
(a)
What is the molar mass of AgNO3? (to the nearest tenth)
(a)
Determine the mass of 2.43 moles of C6H12
(a)
How many grams are in 2.40 x 1023 molecules of O₂?
0.0784 grams
12.8 grams
6.38 grams
32.0 grams
How many moles of water are there in 1.91 x 1025 molecules?
31.6 moles
572 moles
1.77 moles
5.28 x 10-25 moles
What is the mass of 1.50 moles of (NH4)2SO4?
0.00114 g
198 g
150 g
132 g
How many atoms are present in a 0.035 mole sample of silver?
0.35 atoms
2.11 x 1022 atoms
5.81 x 10-26 atoms
1.7 x 1025 atoms
Convert 72.0 grams of ethanol (C2H5OH) to mols
3310 mol
0.639 mol
1.56 mol
72.0 mol
Calculate the mass of 3.50 moles of C6H12
294 g
0.0417 g
24.0 g
525 g
How many moles of iron atoms are in 7.2 x 1026 atoms of iron, Fe?
1.2 x 103 mol Fe
1.2 x 102 mol Fe
2.0 x 10-1 mol Fe
2.0 x 10-2 mol Fe
Calculate the molar mass of sodium hydrogen carbonate, NaHCO3.
62 g
84 g
100 g
120 g
Calculate the mass in grams of 3.45 mol C6H6, benzene.
0.0289 g C6H6
11.5 g C6H6
269 g C6H6
22.6 g C6H6
What is the mass in grams of 2.5 moles of CaBr2?
1.3 x 10-2 g
5.0 x 103 g
8.0 x 102 g
5.0 x 102 g
The mass of 1 mol of MgSO4 ∙ 7 H2O is (a) .
120.4 g
138 g
246.5 g
174 g
How many atoms are present in a 15 gram sample of lithium?
2.7 x1023 atoms
15 atoms
6.3 x1025 atoms
1.3 x1024 atoms
Vitamin C, also known as ascorbic acid, is water soluble and cannot be produced by the human body. Each day, a person's diet should include a source of Vitamin C, such as orange juice. Ascorbic acid has a molecular formula of C6H8O6 and a molar mass of 176 grams per mole.
Calculate the mass of vitamin C in an orange that contains 0.0020 moles of vitamin C.
0.35 grams
8.8 x 10⁴ grams
0.35 kilograms
176 g
What is the total mass, in grams, of a 1.5 mole sample of SO2?
0.023 g
43 g
96 g
64 g
Determine the mass of copper in a sample of copper ore containing 3.01x1024 copper atoms.
0.0787g
63.5g
318g
12.7g
(a) molecules are present in 200. g of ammonia, NH3.
