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Svetllana [295]
2 years ago
9

If you have 10,000 grams of a substance that decays with a half-life of 14 days, then how much will you have after 56 days?

Chemistry
1 answer:
Crank2 years ago
5 0

Answer: 625 grams

Explanation:

14 goes into 56, 4 times.

10,000÷2=5,000 - first half life

5,000÷2=2,500 - second half life

2,500÷2=1,250 - 3rd half life

1,250÷2= 625 - 4th half life

Note: don't type "grams" after 625, just type "625".

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Answer: I THINK C

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The activity of the sample when it was shipped from the manufacturer is 4.54 mCi

<h3>How to determine the number of half-lives that has elapsed </h3>

From the question given above, the following data were obtained:

  • Time (t) = 48 hours
  • Half-life (t½) = 14.28 days = 14.28 × 24 = 342.72 hours
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<h3>How to determine the activity of the sample during shipping </h3>
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Learn more about half life:

brainly.com/question/2674699

5 0
2 years ago
How many moles of sulfur dioxide are in 2.26x10^33 sulfur dioxide molecules?
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Answer:moles = no. of molecules / Avogadro's number

          = 2.26 x 10^33 / 6.022 x 10^23

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Explanation:

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Answer:

Positive charges are eliminated by creating lithium vacancies, and for every Ca2+ ion added, a single lithium vacancy is formed.

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