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What mass grams of copper II oxide will be formed if 125 grams of copper reacts?

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Answer:

159.1 grams

Step-by-step explanation:

You need the balanced chemical equation for the reaction between copper and copper II oxide:

Cu + CuO → 2 CuO

From the equation, you see that 1 mole of copper reacts with 1 mole of copper II oxide to produce 2 moles of copper II oxide. You can use this information to set up a proportion:

1 mole Cu / 1 mole CuO = 2 moles CuO / x moles CuO

Solving for x, you get:

x = 2 moles CuO

Now you can use the molar mass of copper II oxide to convert moles to grams:

2 moles CuO x 79.55 g/mol = 159.1 g CuO

Therefore, 159.1 grams of copper II oxide will be formed when 125 grams of copper reacts.

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