Which of the following is NOT a clue that a chemical reaction has taken place?
1 answer:
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Answer:
1.115 g
Explanation:
Applying,
R = R'................... Equation 1
Where R = original sample of radon-222, R' = sample of radon-222 left after decay, n = Total time, t = half-life.
make R' the subject of the equation
R' = R/()............... Equation 2
From the question,
Given: R = 73.9 g, n = 23 days, t = 3.8 days.
Substitute these values into equation 2
R' = 73.9/()
R' = 73.9/
R' = 1.115 g