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WorksheetsTopic 7 Test
Total questions: 10
Worksheet time: 31mins
What is the empirical formula of a compound containing 12g of carbon, 2g of hydrogen and 16g of oxygen only?
CHO
CHO2
CH2O
C2HO
Which fertiliser contains the greatest percentage by mass of nitrogen?
(NH4)2HPO4 ; Mr = 132
(NH4)2SO4 ; Mr = 132
NH4NO3 ; Mr = 80
CO(NH2)2 ; Mr = 60
A volume of ethane, C2H6, at r.t.p. has a mass of 20g.
What is the mass of an equal volume of propene, C3H6, at r.t.p.?
20 g
21 g
28 g
42 g
Using the Periodic Table for the relative atomic masses, which has the greatest mass?
0.1 moles of iodine molecules, I2
0.5 moles of carbon dioxide, CO2
1.0 mole of beryllium oxide, BeO
1.0 mole of sodium, Na
Ammonia is manufactured from nitrogen and hydrogen by the Haber process. What is the percentage yield when 60kg of ammonia is produced from 60kg of hydrogen?
N2 (g) + 3H2 (g) --> 2NH3 (g)
5.9%
17.6%
35.3%
50.0%
What is the relative molecular mass, Mr, of CuSO4.5H2O
127
160
178
250
The formula of the gas ozone is O3. What is the volume of 48 g of ozone at r.t.p.?
16 dm3
24 dm3
36 dm3
72 dm3
An organic compound has the molecular formula C8H16O4. What is the empirical formula of the compound?
C2H4O
C4H8O2
C6H12O3
C8H16O4
The relative atomic mass of chlorine is 35.5. What is the mass of 2 moles of chlorine gas?
17.75 g
35.5 g
71 g
142 g
Nitrogen monoxide and oxygen react to form nitrogen dioxide.
2NO(g) + O2(g) → 2NO2 (g)
What is the maximum volume of nitrogen dioxide that could be obtained when 1 dm3 of nitrogen monoxide reacts with 2 dm3 of oxygen?
1 dm3
2 dm3
3 dm3
4 dm3
