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Q: A 200 gram sample having a half- life of 12 seconds would have how much remaining after 36 seconds?

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There are 60 seconds in a minute. Two minutes would be 120 seconds. This would mean there are 2 minutes and 2 seconds in 122 seconds.

Sample size is the number of samples arawn from a population. If you drew 20 samples, your sample size would be 20.

We would need to know what sample you are referring to in order to answer this question.

They don't. It would not be feasible to do this. 100 seconds is one minute forty seconds. One hour would be 3,600 seconds.

They would be whole seconds.

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