1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
iogann1982 [59]
3 years ago
13

Suppose that 1 kg of Sodium-24 is reduced to 0.0156 kg in 90 hours. What is the half-life, in hours, of Sodium-24?​

Mathematics
1 answer:
N76 [4]3 years ago
7 0

Answer:

14.99 hours

Step-by-step explanation:

The formula for half-life is given as,

R/R' = 2ᵃ/ᵇ...................... Equation 1

Where R= Original mass of sodium-24, R' = mass of Sodium-24 after disintegration, a = Total time taken for sodium-24 to disintegrate, b = half-life of sodiun-24.

Given: R = 1 kg, R' = 0.0156 kg, a = 90 hours

Substitute into equation 1 and solve for b

1/(0.0156) = 2⁹⁰/ᵇ

Taking the log of both side

log[1/(0.0156)] = log(2⁹⁰/ᵇ)

log[1/(0.0156)] = 90/b(log2)

90/b = log[1/(0.0156)]/log2

90/b = 6.0023

b = 90/6.0023

b =  14.99 hours

b = 14.99 hours.

Hence the half-life of Sodium-24 is 14.99 hours

You might be interested in
Can someone plz show me how to do this very confused. Thx
jekas [21]
I can help. The answer is 18x12=216!! So your answer is 12!
4 0
3 years ago
Read 2 more answers
Hugh bought some magizines that cost 3.95 each and some books that cost 8.95 each. He spent a total of 47.65.If Hugh bought 3 ma
HACTEHA [7]

Answer:

4 books

Step-by-step explanation:

We are told that: Hugh bought some magazines that cost 3.95 each

Hugh bought 3 magazines.

Hence, total cost of magazines = 3 magazines × 3.95

= 11.85.

Total cost of magazines = 11.85

From the question, we know that, the total amount Hugh spent = 47.65

Hence, The total cost for books =

Total amount spent - Total cost of magazines

= 47.65 - 11.85

= 35.80

Therefore, the total cost of books = 35.80

We are told in the question that the cost of books is 8.95 each or 8.95 per book.

Hence, the number of books that Hugh bought is calculated as :

35.80/8.95

= 4 books

Therefore, Hugh bought 4 books

6 0
3 years ago
Sense the pic was blurry last time
AfilCa [17]
To get 20% of something, you must divide it by 5 since 20*5=100
Anyway, since Jada's dog is 20% of it's adult weight, but currently weighing 9kg, we must multiply that by 5
9*5=45kg
Jada's dog's adult weight is 45kg
Hope it helped
6 0
3 years ago
Which of the following is an inscribed angle in the diagram below?
shutvik [7]

Answer:

A  

Step-by-step explanation:

8 0
3 years ago
Written expression for 8 x (3 x 3 - 8) + 10
True [87]

Answer:

bro just use photo math, download it and trust me it works

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • Need a little hand here
    15·1 answer
  • Graph a right triangle with the two points 4,5 and -4,8​
    9·1 answer
  • Which is the graph of y=|x|-2?
    5·2 answers
  • Find the value za/2 needed to constrict a confident interval with level 87%
    14·1 answer
  • Explain how to write the number that is one million more than 458,610,008
    15·2 answers
  • The function y=px2−4x+qy=px2−4x+q in the x-y plane attains a minimum value. What is the value of xx? 1) p=2p=2 2) q=5
    13·1 answer
  • What is the sum of 5,10 and 15?
    10·1 answer
  • Anyone know how to do truth tables
    12·1 answer
  • Brown: Dilate triangle BCD with B(-4,-2)C(0, 2), and D(2, -4) using a scale factor of 5/2. What are the coordinates of D'?​
    10·1 answer
  • Solve the literal equation for y 5x-2=8+5y
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!