The rate constant for a first order reaction with a single reactant is 7.54x10-4 s-1. If the initial reactant concentration is 1.18 M, what will the reactant concentration be after 8.30 minutes?

Answer : The reactant concentration be after 8.30 minutes is, 0.812 M

Explanation :

Expression for rate law for first order kinetics is given by:

where,

k = rate constant  =

t = time passed by the sample  = 8.30 min = 498 s

a = initial amount of the reactant  = 1.18 M

a - x = amount left after decay process = ?

Now put all the given values in above equation, we get

Therefore, the reactant concentration be after 8.30 minutes is, 0.812 M

beta decay is the answer

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates