This question is about experiments involving ethanol. Ethanol and water mix in all proportions. The percentage of ethanol by volume in ethanol-water mixtures can be found by comparing the density of the mixture to the densities of ethanol-water mixtures of known composition, at a constant temperature. (i) Calculate the density of an ethanol-water mixture, sample $$\(\mathbf{A}, 5.00 \mathrm{~cm}^{3}\)$$ of which has a mass of $$\(4.75 \mathrm{~g}\)$$. (1) (ii) Plot a graph of density against the percentage of ethanol by volume. (3) (iii) Determine the percentage of ethanol by volume in sample $$\(\mathbf{A}\)$$ using your answer to (a)(i) and the graph in (a)(ii). Show your working on the graph. (1)

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