Question

Q.1
RCAC
KINETICS
The half-life of francium-212 is 19 minutes. How many minutes will it take for 1 gram of
this isotope to decay to 0.125 grams?
A) 4.75 minutes
C) 38 minutes
B) 9.5 minutes
D) 57 minutes
an equillbrium constant of 1 for a reaction means that the reaction is...

Answer 1

C) 38 minutes






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Answer 2

Answer:

57 minutes

Explanation:

1 gram

~ 0.5 gram

~0.25

~0.125

= 3 half lives i.e.٫ 50 ٪ decay at every step

1 half life takes 19 minutes then 3 half lives wil۔ take 19 × 3 = 57 minutes ❤️