50 cm of a gaseous hydride of phosphorus, PH, reacts with exactly 150 cm³ of chlorine, Cl, to form liquid phosphorus trichloride and 150 cm3 of hydrogen chloride gas, HCI. a How many moles of chlorine react with 1 mole of the gaseous hydride? b Deduce the formula of the phosphorus hydride. c Write a balanced equation for the reaction.

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