Final answer:
To determine the mass of element Q in 1.00 mole of three compounds, we need the chemical formulae to calculate the molar mass and determine the proportion of the element in each compound, which is not provided in the question.
Step-by-step explanation:
The question asks to determine the mass of element Q contained in 1.00 mole of each of three compounds. To do this, we must first know the chemical formulae of the compounds to calculate their molar masses, and then identify the proportion of element Q in each compound. In the absence of the actual compounds' formulae in the question, we cannot provide a specific numerical answer. However, generally speaking, for any given compound, the mass of an element within that compound can be determined by knowing the compound's formula, calculating its molar mass, and then using the proportion of the element within the compound in moles to find the mass of the element itself.