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9 August, 16:46

A 50.51g sample of a compound made from phosphorus and chlorine is decomposed. Analysis of the products showed that 11.39 g of phosphorus atoms were produced. Answer using three significant figures.

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  1. 9 August, 17:00
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    The amount of chlorine in the sample will be calculated by subtracting the mass of phosphorus from the total mass of the compound.

    mass of chlorine = (50.51 g) - (11.39 g)

    = 39.12 g

    The mass percent of phosphorus in the sample is,

    % phosphorus = (11.39 g / 50.51g) x 100% = 22.55%

    and that chlorine is,

    % chlorine = (39.12 g/50.51 g) x 100% = 77.45%
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