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- 1. Multiple Choice
Which of the following is a unit for concentration of a solution?
mol dm-3
cm3 s-1
m s-1
- 2. Multiple Choice
If 1.5 mol of copper sulfate is dissolved to make a solution with a volume of 2 dm3, what is the concentration of the solution?
3 mol dm-3
0.75 mol dm-3
1.33 mol dm-3
- 3. Multiple Choice
A solution has a volume of 650 cm3. What is the volume of this solution in dm3?
0.65 dm3
650,000 dm3
6.5 dm3
- 4. Multiple Choice
How many moles of hydrochloric acid are present in 25 cm3 of a solution which has a concentration of 0.1 mol dm-3?
2.5 moles
0.25 moles
0.0025 moles
- 5. Multiple Choice
Which law states that equal volumes of different gases contain the same number of molecules?
Newton's second law
Avogadro's law
The law of conservation of mass
- 6. Multiple Choice
A sample of methane gas has a volume of 120 cm3 at room temperature and pressure. The molar volume is 24 dm3. How many moles of methane are present in the sample?
2,880 moles
5 moles
0.005 moles
- 7. Multiple Choice
What volume of carbon dioxide would be formed by the complete combustion of 20 cm3 of ethene? The equation is:
C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(l)
20 cm3
40 cm3
80 cm3
- 8. Multiple Choice
What volume of carbon dioxide gas will be produced by the complete combustion of 30g of carbon? Equation:
C(s) + O2(g) → CO2(g)
The molar volume is 24 dm3.
30 dm3
60 dm3
120 dm3
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