Question 1
Paper 2Hard10 marksA laboratory checks a powdered reference blend containing only paracetamol and caffeine. The structures of the two compounds are shown in Figure 1.
A sample of the blend has a mass of 1.6754 g and contains a total amount of 0.01000 mol of molecules. A quality-control note states that the two compounds are present in equal masses.
(a)[4]
Use Figure 1 and the Ar values in the data booklet to determine the molecular formula and Mr of each compound.
(b)[4]
Determine the amount, in mol, of each compound in the sample. Show your reasoning.
(c)[2]
Calculate the mass of each compound in the sample and state whether the quality-control note is supported.