3 years ago

5 A volcanic eruption launches thousands of rocks into the air, The rocks will travel

Physics

1 answer:

Oxana [17]3 years ago

6 0

B. There is an unbalanced force acting on them

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78 grams of a radioactive nuclei X undergoes radioactive decay. The half-life of X is 4.7 minutes. After 16.5 minutes, the remai

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<u>Answer:</u> The remaining sample of X is 6.9 grams.

<u>Explanation:</u>

All the radioactive reactions follow first order kinetics.

The equation used to calculate rate constant from given half life for first order kinetics:

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We are given:

$t_{1/2}=4.7min$

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The equation used to calculate time period follows:

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$N_o$ = initial mass of sample X = 78 g

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Putting values in above equation, we get:

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