Solve for x, where M is molar and s is seconds. x=(4.5×103M−2s−1)(0.25M)3 Enter the answer. Include units. Use the exponent key above the answer box to indicate any exponent on your units.

Ithink the answer is 56.

Answerthe same as;

The answer is d. hope i !

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.