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2 October, 14:53

Given a balanced chemical equation below: 3Cu (s) + 2H3PO4 - - - > Cu3 (PO4) 2 + 3H2 How many moles of copper are needed to react with 5 moles of phosphoric acid?

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  1. 2 October, 18:34
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    7.5 moles

    Explanation:

    We'll begin by writing the balanced equation for the reaction. This is given below:

    3Cu + 2H3PO4 - > Cu3 (PO4) 2 + 3H2

    From the balanced equation above,

    3 moles of Cu reacted with 2 moles of H3PO4.

    Therefore, Xmol of Cu will react with 5 moles of H3PO4 i. e

    Xmol of Cu = (3 x 5) / 2

    Xmol of Cu = 7.5 moles

    Therefore, 7.5 moles of Cu are needed to react with 5 moles of H3PO4.
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