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kondor19780726 [428]
2 years ago
7

Element Y has a half-life of 120 years. If you started off with a sample of 280 atoms of Element Y, how many would be left

Chemistry
1 answer:
stellarik [79]2 years ago
6 0
It’s Gotta Be One Of Those
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Burning Mg in the air and reacting with O2 forming a white powder of MnO

So the equation is going to be:
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to make it equilibrium:
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So it will be:
Mg + O2⇒ 2MgO
2- Second we should put 2Mn to equal the Mn on both sides.
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After putting the physical states the final equilibrium equation is going to be:
                        Δ
2Mg(s) + O2(g)⇒ 2MgO(s)

 

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