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Questions and Answers
Which of the following is the correct equation for the gas constant R?
Which of the following is the correct equation for the gas constant R?
- $R = 8.31 J K mol^-1$
- $R = 8.31 J K^-1 mol^-1$ (correct)
- $R = 8.31 J K^-1 mol$
- $R = 8.31 J K mol$
What is the maximum mark for this paper?
What is the maximum mark for this paper?
- 50
- 20
- 30
- 40 (correct)
What is the percentage of total marks that this paper carries for Advanced Level?
What is the percentage of total marks that this paper carries for Advanced Level?
- 15%
- 5%
- 20%
- 10% (correct)
According to the information provided, what is the enthalpy change for the reaction 3C(s) + 4H2(g) → C3H8(g)?
According to the information provided, what is the enthalpy change for the reaction 3C(s) + 4H2(g) → C3H8(g)?
Which functional group isomers are pairs?
Which functional group isomers are pairs?
Based on the given information, what is the mole fraction of butane in a mixture of butane and oxygen with the minimum amount of oxygen required for complete combustion?
Based on the given information, what is the mole fraction of butane in a mixture of butane and oxygen with the minimum amount of oxygen required for complete combustion?
Which type of reaction mechanism is involved in the given sequence?
Which type of reaction mechanism is involved in the given sequence?
Using the provided equation for the combustion of butane in oxygen, what is the enthalpy of combustion of propane?
Using the provided equation for the combustion of butane in oxygen, what is the enthalpy of combustion of propane?
What is the correct statement about the mechanism for the reaction between ammonia and ethanoyl chloride?
What is the correct statement about the mechanism for the reaction between ammonia and ethanoyl chloride?
Given the reversible reaction CH3COOH(l) + C2H5OH(l) ⇌ CH3COOC2H5(l) + H2O(l), what is the equilibrium constant when 3.0 mol of ethanoic acid and 1.0 mol of ethanol react to form 0.9 mol of water?
Given the reversible reaction CH3COOH(l) + C2H5OH(l) ⇌ CH3COOC2H5(l) + H2O(l), what is the equilibrium constant when 3.0 mol of ethanoic acid and 1.0 mol of ethanol react to form 0.9 mol of water?
Which of the following statements about the reaction between propanone and iodine is correct?
Which of the following statements about the reaction between propanone and iodine is correct?
Which of the following molecules has a shape influenced by one or more lone pairs of electrons?
Which of the following molecules has a shape influenced by one or more lone pairs of electrons?
Which of the following substances requires covalent bonds to break upon melting?
Which of the following substances requires covalent bonds to break upon melting?
Which of the following redox reactions is correct?
Which of the following redox reactions is correct?
Which one of the following statements is correct concerning the ester CH3COOC2H5?
Which one of the following statements is correct concerning the ester CH3COOC2H5?
Which one of the following will produce a saturated solution with the highest pH?
Which one of the following will produce a saturated solution with the highest pH?
The maximum mass of iron that could be extracted from 1.0 tonne of a particular sample of iron ore containing 85% by mass of Fe2O3 is
The maximum mass of iron that could be extracted from 1.0 tonne of a particular sample of iron ore containing 85% by mass of Fe2O3 is
In which one of the following reactions does hydrogen not act as a reducing agent?
In which one of the following reactions does hydrogen not act as a reducing agent?
