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sergey [27]
2 years ago
15

Activity 2 Directions: Select among the choices thbest type of material to be used in making the objects at the left and explain

our answers. Write your answers in a separate sheet of paper. Translucent Transparent Opaque
QUICK ANSWER PLEASE







​

Chemistry
1 answer:
joja [24]2 years ago
3 0

Answer:

A Walk in the City

Make a list of the number of cars, jeeps, tricycle, and even trucks you've seen on your way to school. On a Decision Making Chart, answer the question, "Does the volume of traffic affect the air quality in my local community?" Write your reasons for saying YES on the Reasons for column, and the reasons for saying NO on the Reasons Against column. At the bottom of a chart, make a position by writing your decision on the same question.

Decision Making Chart

[question]

[reason for]

[reason against]

[my decision]

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The half-life of argon-39 is 269 years. It decays into krypton-39. After 1,076 years, what fraction of the original amount of ar
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Explanation:

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

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Time (t) = 1076 years

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Next, we shall determine the number of half-lives that has elapsed. This can be obtained as follow:

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Time (t) = 1076 years

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n = 1076 / 269

n = 4

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Finally, we shall determine the fraction of the original amount remaining. This can be obtained as follow:

Let N₀ be the original amount.

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Fraction remaining (N/N₀ ) =?

N = 1/2ⁿ × N₀

N = 1/2⁴ × N₀

N = 1/16 × N₀

Divide both side by N₀

N/N₀ = 1/16

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