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DerKrebs [107]
3 years ago
9

NEED HELP NOW 100 POINTS 5 pictures to answer WILL MARK BRAINLIEST ANSWER!!!!!!!!! on question 9 and 10 you have to write a writ

ten short response.

Chemistry
2 answers:
Sholpan [36]3 years ago
5 0

1-a

2-c

3-a

4-b

hope it helps you bye

irga5000 [103]3 years ago
3 0
Ok number one  is A number 2 is C  number 3 is A number 4 is  B hope it helps 
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substance is related to the average kinetic energy of the particles of that substance

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This is a one-step unit analysis problem.  Since we are staying in moles, grams of our compound, and thus molar mass, is not needed.

1 mole is equal to 6.022x10²³ particles as given, so:

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The half-life of radon gas is approximately four days. Four weeks after the introduction of radon into a sealed room, the fracti
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The fraction of the original amount remaining is closest to 1/128

<h3>Determination of the number of half-lives</h3>
  • Half-life (t½) = 4 days
  • Time (t) = 4 weeks = 4 × 7 = 28 days
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n = t / t½

n = 28 / 4

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<h3>How to determine the amount remaining </h3>
  • Original amount (N₀) = 100 g
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N = N₀ / 2ⁿ

N = 100 / 2⁷

N = 0.78125 g

<h3>How to determine the fraction remaining </h3>
  • Original amount (N₀) = 100 g
  • Amount remaining (N)= 0.78125 g
  • Fraction remaining =?

Fraction remaining = N / N₀

Fraction remaining = 0.78125 / 100

Fraction remaining = 1/128

Learn more about half life:

brainly.com/question/26374513

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Which is true of binary ionic compounds?
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