Item5 time remaining 56 minutes 30 seconds00: 56: 30 item 5item 5 time remaining 56 minutes 30 seconds00: 56: 30 a pure sample of tritium, 3h, was prepared and sealed in a container for a number of years. tritium undergoes β decay with a half-life of 12.32 years. how long has the container been sealed if analysis of the contents shows there are 5.25 mol of 3h and 6.35 mol of 3he present? multiple choice a. 14.1 y b. 25.6 y c. 2.34 y d. 3.38 y e. 9.77 y

option A

Step-by-step explanation:

given,

sample of tritium, ³H

contents present of ³H = 5.25 mol

content of ³He = 6.35 mol

reaction

A₀ is the initial concentration

At is the concentration after time t

A₀ = 5.25 + 6.35 = 11.6 mol

At = 5.25

now,

           k = 0.0563 /year

t = 14.1 yr

hence, the correct answer is option A

a. 74 degrees

step-by-step explanation:

because the lines through the side and the box in the corners shows that these are congruent triangles and since they are mirrored the 37 degrees is also mirrored so the answer is 37 * 2 which is 74.

step-by-step explanation:

i believe its "c" because all of the other options include a but it could be d because there is a way of financing with cash at certain places but its uncommon.