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Irina18 [472]
3 years ago
5

If there were 10 grams of a radioactive isotope, how much of the sample would be left after 1 half-life? How much after 2 half-l

ives?
Chemistry
1 answer:
Vikentia [17]3 years ago
3 0
One half-life: 5 grams
Two half-lives: 2.5 grams
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alexdok [17]

Answer:

The answer to your question is ΔH° rxn = -1343.9 kJ/mol

Explanation:

                       P₄O₆ (s)  +  2 O₂ (g)   ⇒  P₄O₁₀

ΔH°rxn = ?

Formula

ΔH°rxn = ∑H° products - ∑H° reactants

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-Substitution

ΔH° rxn = (-2984) - (-1640.1) - (0)

-Simplification

ΔH° rxn = -2984 + 1640.1

ΔH° rxn = -1343.9 kJ/mol

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Hey mate.....

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This is ur answer.....

---> Equal

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mark me as the brainliest,

Follow me......

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