Write chemical equations of reactions that occur when a small amount of a strong acid or a strong base is added to the buffer and use these equations to explain how and why concentrations of buffer components change;

Sorry i think the answer is b

I’m really not sure what’s the answer. sorry

It must be measured in k.hope my answer is to you : )

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.