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WorksheetsChemistry Chapter 10 Review
Total questions: 60
Worksheet time: 10hrs 0mins
Which of the following statements regarding the mole is INCORRECT?
A mole is a unit of quantity equal to 6.02 x 1023 particles.
The number of particles in a mole is known as Avogadro’s number.
A mole of particles of an element is numerically equal to the atomic mass of the element.
none of the above
The mass of one mole of an element is equal to
its atomic number from the periodic table, but in amus.
its atomic mass from the periodic table, but in amus.
its atomic mass from the periodic table, but in grams.
its atomic number from the periodic table, but in grams.
What is the molar mass of PbSO4?
303.27 g/mol
255.27 g/mol
163.87 g/mol
372.27 g/mol
How many formula units are in 2.5 moles of NaCl?
1.5 x1024 formula units
1.5 formula units
4.2 formula units
4.2 x10-24 molecules
Shivani measures out 6.0 moles of epsom salt (MgSO4) to put in her bath. How many grams of MgSO4 went in the bath?
3.6 x 1024 g
720 g
0.050 g
340 g
Determine the mass of 4.20 moles of C6H12
353 g
0.0499 g
337 g
2.53 x 1024 g
Which of the following dimensional analysis setups will correctly convert 27.76 g of Li to atoms of Li?
A
B
C
D
What is the mass of 1.2 x 1024 atoms of C?
2.0 grams
24 grams
0.17 grams
1.4 x 1025 grams
Calculate the number of atoms in 0.0340 g Zn.
5.20 x 10-4 atoms Zn
3.13 x 1023 atoms Zn
3.13 x 1020 atoms Zn
2.05 x 1022 atoms Zn
How many grams are in 1.2 moles of neon?
0.059 grams
7.2 x 1023 grams
2.0 x 10-24 grams
24 grams
How many moles are in 98.3 grams of aluminum hydroxide, Al(OH)3?
1.26 moles
0.8 moles
7,670 moles
1.63 x 10-22 moles
Which of the following dimensional analysis setups will correctly convert 4.00x1023atoms of cobalt to moles of cobalt? How many moles of colbalt are there?
setup B : 0.664 mol Co
setup A: 2.41x1047mol Co
setup A : 0.664 mol Co
setup B: 2.41x1047mol Co
What is the molar mass of table salt (NaCl)? Read all options! Be careful!
58.44 amu
35.45 g/mol
22.99 g/mol
58.44 g/mol
To melt the ice, Juan throws 455 g of calcium chloride, CaCl2 on his sidewalk. How many moles of CaCl2 did he throw?
50,500 moles
4.10 moles
7.56 x 10-22 moles
111 moles
What is the mass of one mole of silver?
32.06 g
107.87 g
14.01 g
22.99 g
48.86 g of cobalt is equal to how many moles of cobalt?
2879 moles
8.291 moles
.8291 moles
.829 moles
How many molecules of water are in a 821.3 g sample?
45.58 molecules
8.232 x 1025 molecules
8.909 x 1027 molecules
2.744 x 1025 molecules
What is the mass of 4.98 x 1024 atoms of Zn?
541 g
8.27 g
.122 g
4.59 x 1046 g
How many moles of sodium chloride are in a 321.8 g sample?
18810 moles
3.315 x 1024 moles
5.507 moles
4.767 moles
How many formula units of calcium chloride are in a 25.69 g sample?
1.394 x 1023 F.U.'s
2851 F.U.'s
.2315 F.U.'s
3.845 x 1025 F.U.'s
Convert 86.235 g of diphosphorus pentaoxide to moles.
12240 moles
1.8747 moles
.608 moles
.60755 moles
how many atoms are contained in a 456 g sample of carbon dioxide?
10.34 atoms
6.237 x 1024 atoms
1.871 x 1025atoms
2.079 x 1024 atoms
What would be the mass of 9.76 x 1022 formula units of SrCl2?
.1622 g
25.7 g
20.0 g
.3589 g
A sample of AlCl3 contains a total of 4.515 x 1027 atoms of chlorine. What must be the mass of this sample?
2.500 x 105 g
1.000 x 106 g
18.75 g
3.333 x 105 g
How many atoms are present in a 13.5 gram sample of beryllium?
1.5 particles
9 particles
4.03 x1023 particles
9.02 x1023 particles
A sample of silver contains 5.71 x 1022 atoms. How many moles of silver are present?
3.43 x 1046 moles
0.0529 moles
0.0948 moles
10.5 moles
How many atoms are present in a 0.0254 mole sample of gold?
0.25 atoms
1.528 x 1022 atoms
4.22 x 10-25 atoms
5 atoms
Which of the following shows the correct setup to determine the number of moles of molecules in a 12.0 gram sample of Cl2?
12/35.5 mole
12/71 mole
12 moles
12 x 35.5 moles
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.
Determine the number of moles of vitamin C in an orange that contains 0.171 grams of vitamin C.
30.1 moles
1030 moles
.000971 moles
.0001 mole
What is the molar mass of calcium hydroxide, Ca(OH)2?
74.1 g/mole
57.1 g/mole
58.1 g/mole
57.1 u
What is the molar mass of Zn(C2H3O2)2?
392.8g/mol
142.9g/mol
361g/mol
183.5 g/mol
Determine the mass of 2.40 moles of C6H12
201 g
115 g
230. g
353 g
What is the total mass, in grams, of a 0.75 mole sample of SO2?
16 g
24 g
32 g
48 g
How many molecules are present in a 135 g sample of Teflon, which has a formula of C2F4?
6.13 x 1023 molecules
5.13 x 1023 molecules
8.13 x 10 23 molecules
9.13 x 1023 molecules
Which element in the compound potassium cyanide, KCN, has a percent composition of 60.97%?
K
C
N
None of the above
What is the percent by mass of oxygen in MgO? Hint: The attached image is an example of a worked problem other than this one.
20%
40%
50%
60%
H = 50%
H = 14.3%
H = 7.8%
H = 28.1%
Pb5Cr5O20
Which element has an abundance of 39.03% in the compound sodium phosphate, Na3PO4
Na
P
O
None of the above
Which element in the compound potassium cyanide, KCN, has a percent composition of 60.97%?
K
C
N
None of the above
