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Kezi heats 0.12g of magnesium in air.burns to make o.20g of magnesium oxide. What mass of oxygen has joined to the magnesium in this reaction?

Answer :

The mass of oxygen that has joined magnesium in this reaction is 0.08g, found by subtracting the initial mass of magnesium from the final mass of magnesium oxide.

To find the mass of oxygen that has joined the magnesium in this reaction, subtract the initial mass of the magnesium from the final mass of the magnesium oxide.

So, 0.20g (final mass) - 0.12g (initial mass) = 0.08g

So, 0.08g of oxygen reacted with the magnesium during the reaction to form magnesium oxide.

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