If two protons and two neutrons are added to the nucleus of a carbon atom, what nucleus does it become?

1 answer:

5 0

If two protons are added to carbon, the chemical identity changes to oxygen, which is two spaces over horizontally on the periodic table. The number of protons is what we call the atomic number (Z), and this is what defines the identity of an element. Since we also added two neutrons, this is simply oxygen, or oxygen-16, the most abundant isotope of oxygen.

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Calculate the enthalpy change for the thermite reaction: 2al(s)+fe2o3(s)→2fe(s)+al2o3(s), δh∘rxn=−850 kj when 12.0 mol of al und

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Answer : 5100 KJ

Explanation : In the given reaction of

$Fe_{2} O_{3} + 2Al ----\ \textgreater \ Al_{2}O_{3} + 2Fe$

we can see that 2 moles of Al is producing -850 KJ of energy

so for 12 moles of Al we can calculate as;

12 moles of Al X $\frac{-850}{2 moles of Al}$ = -5100 KJ

So, we can say that 12 moles of Al will need -5100 KJ of energy.

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