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DIA [1.3K]
2 years ago
11

A sample of rock contains 80 grams of a parent radioactive isotope that has a half-life of 20 000 years. After 100 000 years, th

e number of grams of the parent radioactive isotope remaining is
Chemistry
1 answer:
Tatiana [17]2 years ago
4 0

Answer:

2.5 g

Explanation:

Number of half lives is 100000/20000 = 5 half lives

so (1/2)^5 = 1/32 of the original sample remains

So (80)(1/32)=2.5 g

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6 0
3 years ago
Urgent!!
madam [21]

Answer:

Harmony is correct, because Mendeleev’s model made predictions that came true.

Explanation:

Mendeleev published periodic table.

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6 0
3 years ago
Read 2 more answers
1. 750 x 10^3 ng to g​
Temka [501]

Answer:

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Explanation:

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so the answer is

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if anything is unclear, ask freely.

4 0
3 years ago
Is mercury a solution​
Dvinal [7]

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Please Hurry
Jet001 [13]

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B,C,F

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