7. GCSE level chemistry practise exam
question calculations on
the basics of moles, mass and formula mass
How many moles of iron are there in 2.8g? (atomic mass Fe = 56) [mam-1]
0.05
156.8
20.0
2.0
How many moles of sulfur are there in 64g? (atomic mass S = 32) [mam-2]
2048
2.0
0.5
0.05
How many moles of sodium are there in 115g? (atomic mass Na = 23) [mam-3]
2645
0.2
5
4
How many moles of carbon are there in 3g? (atomic mass C = 12 ) [mam-4]
36
4
0.5
0.25
How many moles of zinc are there in 1.625g? (atomic mass Zn = 65) [mam-5]
0.025
105.6
40.0
100.0
How many moles of iodine are there in 12.7g of I2? (atomic mass I = 127) [mam-6]
10.0
0.05
0.10
5.0
How many moles of chlorine are there in 213g of Cl2? (atomic mass Cl = 35.5) [mam-7]
0.17
0.33
3.0
6.0
How many moles of bromine are there in 6.4g of Br2? (atomic mass Br = 80) [mam-8]
512
1024
0.08
0.04
How many moles of phosphorus are there in 24.8g of P4? (atomic mass P = 31) [mam-9]
0.2
0.8
7688
1922
How many moles of oxygen are there in 128g of O2? (atomic mass O = 16) [mam-10]
8
4
2048
1032
How many moles of water are there in 4.5g of H2O? (atomic masses: H = 1, O = 16) [mam-11]
81
0.26
0.25
72
How many moles of methane are there in 112g of CH4? (atomic masses: C = 12, H = 1) [mam-12]
8.6
1792
0.14
7.0
How many moles of sodium sulfate are there in 7.1g of Na2SO4? (atomic masses: Na = 23, S = 32, O = 16) [mam-13]
0.05
10082
20
5
How many moles of sulfuric acid are there in 2.45g of H2SO4? (atomic masses: H = 1, S = 32, O = 16) [mam-14]
240.1
0.025
40.0
3.0
How many moles of calcium hydroxide are there in 25.9g of Ca(OH)2? (atomic masses: Ca = 40, O = 16, H = 1) [mam-15]
2.86
1916
0.35
45.0
How many g are there in 1.5 moles of aluminium? (atomic mass Al = 27) [mam-16]
0.056
18.0
9.0
40.5
How many g are there in 0.02 moles of uranium? (atomic mass U = 238) [mam-17]
4.76
11900
0.00008
2.58
How many g are there in 0.65 moles of magnesium? (atomic mass Mg = 24) [mam-18]
0.027
15.6
36.9
7.8
How many g are there in 0.23 moles of silicon? (atomic mass Si = 28) [mam-19]
0.0082
121.7
6.44
0.82
How many g are there in 7.3 moles of boron? (atomic mass B = 10.8) [mam-20]
0.68
1.48
70.0
78.84
How many g are there in 0.05 moles of nitrogen, N2? (atomic mass N = 14) [mam-21]
1.4
2.4
0.0035
280
How many g are there in 0.75 moles of ozone, O3? (atomic mass O = 16) [mam-22]
0.047
36.0
12.0
0.016
How many g are there in 2.5 moles of oxygen, O2? (atomic mass O = 16) [mam-23]
4.0
6.4
80.0
40.0
How many g are there in 0.16 moles of chlorine, Cl2? (atomic mass Cl = 35.5) [mam-24]
5.68
221.8
443.8
11.36
How many g are there in 1.65 moles of iodine, I2? (atomic mass I = 127) [mam-25]
419.1
77.0
154.0
209.6
How many g are there in 3.6 moles of sodium hydroxide, NaOH? (atomic masses: Na = 23, O = 16, H = 1) [mam-26]
0.09
144
11.1
7.2
How many g are there in 1.5 moles of nitric acid, HNO3? (atomic masses: H = 1, N = 14, O = 16) [mam-27]
42.0
0.024
94.5
46.5
How many g are there in 0.15 moles of ammonium sulfate, (NH4)2SO4? (atomic masses: N = 14, H = 1, S = 32, O = 16) [mam-28]
0.0011
880.0
17.1
19.8
How many g are there in 0.8 moles of aluminium hydroxide, Al(OH)3? (atomic masses: Al = 27, O = 16, H = 1) [mam-29]
62.4
97.5
0.01
10.0
How many g are there in 0.005 moles of sodium thiosulfate, Na2S2O3? (atomic masses: Na = 23, S = 32, O =16) [mam-30]
0.71
0.79
0.63
0.55
It was found that 0.2 moles of atoms of an element had a mass of 3.2g. What is the relative atomic mass of the element? [mam-31]
6.4
8.0
16.0
15.0
It was found that 0.005 moles of atoms of an element had a mass of 0.295g. What is the relative atomic mass of the element? [mam-32]
15
60
16
59
It was found that 0.15 moles of atoms of an element had a mass of 10.95g. What is the relative atomic mass of the element? [mam-33]
73
164
82
146
It was found that 0.4 moles of atoms of an element had a mass of 56.2g. What is the relative atomic mass of the element? [mam-34]
22.5
140.5
224.0
25.0
It was found that 0.015 moles of atoms of an element had a mass of 2.88g. What is the relative atomic mass of the element? [mam-35]
432
450
192
200
It was found that 0.25 moles of atoms of an element had a mass of 40.65g. What is the relative atomic mass of the element? [mam-36]
10.2
102.0
16.0
162.6
It was found that 0.002 moles of a compound had a mass of 0.24g. What is the relative formula mass of the compound? [mam-37]
120
12
48
480
It was found that 0.005 moles of a compound had a mass of 0.2025g. What is the relative formula mass of the compound? [mam-38]
101.3
40.5
24.7
247
It was found that 0.25 moles of a compound had a mass of 14.05g. What is the relative formula mass of the compound? [mam-39]
177.8
35.1
56.2
28.1
It was found that 0.025 moles of a compound had a mass of 0.70g. What is the relative formula mass of the compound? [mam-40]
175
280
140
28
How many moles of iron are there in 2.8g? (atomic mass Fe = 56) [mam-1]
How many moles of sulfur are there in 64g? (atomic mass S = 32) [mam-2]
How many moles of sodium are there in 115g? (atomic mass Na = 23) [mam-3]
How many moles of carbon are there in 3g? (atomic mass C = 12 ) [mam-4]
How many moles of zinc are there in 1.625g? (atomic mass Zn = 65) [mam-5]
How many moles of iodine are there in 12.7g of I2? (atomic mass I = 127) [mam-6]
How many moles of chlorine are there in 213g of Cl2? (atomic mass Cl = 35.5) [mam-7]
How many moles of bromine are there in 6.4g of Br2? (atomic mass Br = 80) [mam-8]
How many moles of phosphorus are there in 24.8g of P4? (atomic mass P = 31) [mam-9]
How many moles of oxygen are there in 128g of O2? (atomic mass O = 16) [mam-10]
How many moles of water are there in 4.5g of H2O? (atomic masses: H = 1, O = 16) [mam-11]
How many moles of methane are there in 112g of CH4? (atomic masses: C = 12, H = 1) [mam-12]
How many moles of sodium sulfate are there in 7.1g of Na2SO4? (atomic masses: Na = 23, S = 32, O = 16) [mam-13]
How many moles of sulfuric acid are there in 2.45g of H2SO4? (atomic masses: H = 1, S = 32, O = 16) [mam-14]
How many moles of calcium hydroxide are there in 25.9g of Ca(OH)2? (atomic masses: Ca = 40, O = 16, H = 1) [mam-15]
How many g are there in 1.5 moles of aluminium? (atomic mass Al = 27) [mam-16]
How many g are there in 0.02 moles of uranium? (atomic mass U = 238) [mam-17]
How many g are there in 0.65 moles of magnesium? (atomic mass Mg = 24) [mam-18]
How many g are there in 0.23 moles of silicon? (atomic mass Si = 28) [mam-19]
How many g are there in 7.3 moles of boron? (atomic mass B = 10.8) [mam-20]
How many g are there in 0.05 moles of nitrogen, N2? (atomic mass N = 14) [mam-21]
How many g are there in 0.75 moles of ozone, O3? (atomic mass O = 16) [mam-22]
How many g are there in 2.5 moles of oxygen, O2? (atomic mass O = 16) [mam-23]
How many g are there in 0.16 moles of chlorine, Cl2? (atomic mass Cl = 35.5) [mam-24]
How many g are there in 1.65 moles of iodine, I2? (atomic mass I = 127) [mam-25]
How many g are there in 3.6 moles of sodium hydroxide, NaOH? (atomic masses: Na = 23, O = 16, H = 1) [mam-26]
How many g are there in 1.5 moles of nitric acid, HNO3? (atomic masses: H = 1, N = 14, O = 16) [mam-27]
How many g are there in 0.15 moles of ammonium sulfate, (NH4)2SO4? (atomic masses: N = 14, H = 1, S = 32, O = 16) [mam-28]
How many g are there in 0.8 moles of aluminium hydroxide, Al(OH)3? (atomic masses: Al = 27, O = 16, H = 1) [mam-29]
How many g are there in 0.005 moles of sodium thiosulfate, Na2S2O3? (atomic masses: Na = 23, S = 32, O =16) [mam-30]
It was found that 0.2 moles of atoms of an element had a mass of 3.2g. What is the relative atomic mass of the element? [mam-31]
It was found that 0.005 moles of atoms of an element had a mass of 0.295g. What is the relative atomic mass of the element? [mam-32]
It was found that 0.15 moles of atoms of an element had a mass of 10.95g. What is the relative atomic mass of the element? [mam-33]
It was found that 0.4 moles of atoms of an element had a mass of 56.2g. What is the relative atomic mass of the element? [mam-34]
It was found that 0.015 moles of atoms of an element had a mass of 2.88g. What is the relative atomic mass of the element? [mam-35]
It was found that 0.25 moles of atoms of an element had a mass of 40.65g. What is the relative atomic mass of the element? [mam-36]
It was found that 0.002 moles of a compound had a mass of 0.24g. What is the relative formula mass of the compound? [mam-37]
It was found that 0.005 moles of a compound had a mass of 0.2025g. What is the relative formula mass of the compound? [mam-38]
It was found that 0.25 moles of a compound had a mass of 14.05g. What is the relative formula mass of the compound? [mam-39]
It was found that 0.025 moles of a compound had a mass of 0.70g. What is the relative formula mass of the compound? [mam-40]
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How many moles of iron are there in 2.8g? (atomic mass Fe = 56) [mam-1]