Ask question

Ask question

All categories

3 years ago

7

Please help me with this

1 answer:

IgorC [24]3 years ago

3 0

It would be 3 and a half because 4 is too much

You might be interested in

Item5 Time Remaining 56 minutes 30 seconds00:56:30 Item 5Item 5 Time Remaining 56 minutes 30 seconds00:56:30 A pure sample of tr

trapecia [35]

Answer:

option A

Step-by-step explanation:

given,

sample of tritium, ³H

$t_{1/2} = 12.32 years$

contents present of ³H = 5.25 mol

content of ³He = 6.35 mol

reaction

$^3H\rightarrow \ ^3He$

A₀ is the initial concentration

At is the concentration after time t

A₀ = 5.25 + 6.35 = 11.6 mol

At = 5.25

now,

$k = \dfrac{0.693}{t_{1/2}}$

$k = \dfrac{0.693}{12.32}$

k = 0.0563 /year

$ln(\dfrac{A_o}{A_t}) = k t$

$t = \dfrac{1}{k} ln(\dfrac{A_o}{A_t})$

$t = \dfrac{1}{0.0563} ln(\dfrac{11.6}{5.25})$

t = 14.1 yr

hence, the correct answer is option A

7 0

3 years ago

Use rounding or compatible numbers to estimate the sum of 87+34

joja [24]

121 right because 87+34 is 121 but do i have to round the number

3 0

4 years ago

Read 2 more answers

A cylinder has a height of 7 yards and a radius of 14 yards. What is its volume? Use ≈ 3.14 and round your answer to the neare

Leviafan [203]

4310.261

Radius= 14
Height = 7

14^2*7=1372

1372*π=4310.261

7 0

3 years ago

There were 239 people at a Travis Scott concert. Admission to the drive-in concert was $15 for adults and $5.50 for children. Th

Grace [21]

100$ don’t trust me thought lol

5 0

3 years ago

When an object loses its original shape and size

Sloan [31]

When it is broken!!!!!

4 0

3 years ago

Read 2 more answers