A certain substance has a half-life of 4 minutes. A fresh sample of the substance weighing 90 mg was obtained. After how many minutes will there be 23 mg of the substance remaining?

1 answer
Question:

A certain substance has a half-life of 4 minutes. A fresh sample of the substance weighing 90 mg was obtained. After how many minutes will there be 23 mg of the substance remaining?

Answers

The half life of a substance is the time i takes for the radioactive component for a substance to decay or disintegrate to half of its initial size.We are to find the time (number of minutes) is would take for 23 mg of the substance to be remaining.The formula for time is written as: t =  [t1/2 x In(Nt/No)]  / In 2where: t1/2 = Half life = 4 minutesNo = Initial quantity of the sample = 90 mgNt = Amount of the sample left = 23 mgt =  time elapsed = ?Hence, t = [4 x In (23/90)] / -In 2t = 7.8731645610906 minutesApproximately to the nearest hundredth = 7.87 minutesTherefore, there will be 23mg of substance remaining after 7.87 minutes.To learn more, visit the link below:https://brainly.com/question/16624562

Similar Solved Questions

2 answers

. ¿Participaste en alguna carrera?

. ¿Participaste en alguna carrera?...
1 answer

A wetland, or marshes, is a distinct ecosystem that is inundated by water, either permanently or seasonally, where oxygen-free processes prevail. Many habitats that are rich in plant life are important stores of carbon. How do marshes lock away carbon?

A wetland, or marshes, is a distinct ecosystem that is inundated by water, either permanently or seasonally, where oxygen-free processes prevail. Many habitats that are rich in plant life are important stores of carbon. How do marshes lock away carbon?...
1 answer

What were 3 issues that led to hard feelings between the soviet union and united states

what were 3 issues that led to hard feelings between the soviet union and united states...
1 answer

Please help me please !!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!

Please help me please !!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!...
1 answer

T f(x) = x 5 - 3x 3 24 is

T f(x) = x 5 - 3x 3 24 is...
1 answer

$En la cima del Chopicalqui se encuentra un alpinista, si la cima está a una altura de 6746 m. desciende 429 m. Otro alpinista se encuentra a 280 m antes de la cima y luego asciende 115 m. ¿Cuál es la diferencia entre las alturas en las que se encuentran los 2 alpinistas? por fa doy corona y corazon

$En la cima del Chopicalqui se encuentra un alpinista, si la cima está a una altura de 6746 m. desciende 429 m. Otro alpinista se encuentra a 280 m antes de la cima y luego asciende 115 m. ¿Cuál es la diferencia entre las alturas en las que se encuentran los 2 alpinistas? por fa doy corona y cora...
1 answer

The compound chromium(II) nitrate is a strong electrolyte. Write the reaction when solid chromium(II) nitrate is put into water:

The compound chromium(II) nitrate is a strong electrolyte. Write the reaction when solid chromium(II) nitrate is put into water:...
1 answer

What are some factors FOR lowering the legal drinking age.And what are some factors AGAINST it

What are some factors FOR lowering the legal drinking age.And what are some factors AGAINST it...
1 answer

In general, the more physical activity individuals do, A. the more intense the exercise needs to be B. the more money they will save on dieting C. the more television they will be able to watch D. the more benefit they will receive from exercise Please select the best answer from the choices provided. А B С D

In general, the more physical activity individuals do, A. the more intense the exercise needs to be B. the more money they will save on dieting C. the more television they will be able to watch D. the more benefit they will receive from exercise Please select the best answer from the choices provide...
1 answer

Find the smallest square number that is divisible by each of the numbers 8,15and20. explain ​

find the smallest square number that is divisible by each of the numbers 8,15and20. explain ​...
2 answers

Carlos listed some advantages and disadvantages of using nonrenewable resources. which best describes carlos’s error?

Carlos listed some advantages and disadvantages of using nonrenewable resources. which best describes carlos’s error?...
2 answers

Urgent!! Find the length of B by using the Pythagorean Theorem

Urgent!! Find the length of B by using the Pythagorean Theorem...
1 answer

The Turquoise Oasis Spa places orders for cases of bath salts through a nearby wholesaler. To summarize several orders worth of data, it may prove beneficial to determine how many orders of bath salts were for 1 to 10 cases, between 11 and 20 cases, 21 to 30 cases, 31 to 40 cases, and more than 40 cases. This is an example of ________.

The Turquoise Oasis Spa places orders for cases of bath salts through a nearby wholesaler. To summarize several orders worth of data, it may prove beneficial to determine how many orders of bath salts were for 1 to 10 cases, between 11 and 20 cases, 21 to 30 cases, 31 to 40 cases, and more than 40 c...
1 answer

A union or team formed to support and protect one another

a union or team formed to support and protect one another...
2 answers

Which of the following words match this definition of religious change: "preaching the imminent end of the present world and the birth of a new one."

Which of the following words match this definition of religious change: "preaching the imminent end of the present world and the birth of a new one."...
1 answer

Find the inner product for (8,4)(2,4)and state whether the vectors are perpendicular. a. 8; no c. 32; no b. 8; yes d. 32; yes Please select the best answer from the choices provided A B C D

Find the inner product for (8,4)(2,4)and state whether the vectors are perpendicular. a. 8; no c. 32; no b. 8; yes d. 32; yes Please select the best answer from the choices provided A B C D...
1 answer

Find the exact value of the expression if 0 = 45°. Do not use a calculator. 11) g(O) = sin 0 Find 4 g(O).

Find the exact value of the expression if 0 = 45°. Do not use a calculator. 11) g(O) = sin 0 Find 4 g(O)....
1 answer

Which changes were effects of the Mexican Revolution? check all that apply

Which changes were effects of the Mexican Revolution? check all that apply...

-- 0.035409--