The `.^(60)C` isotope decays with a half life of 5.3 years. How long would it take for 7/8 of a sample of 500 mg of `.^(60)Co` to disintegrate?

The `.^(60)C` isotope decays with a half life of 5.3 years. How long would it take for 7/8 of a sample of 500 mg of `.^(60)Co` to disintegrate?
by

1 Answer

Answer :

The `.^(60)C` isotope decays with a half life of 5.3 years. How long would it take for 7/8 of a sample ... B. 15.9 years C. 10.6 years D. 5.3 years
by
selected by

Related questions

`Co^(60)` has half-life of `5.3` years. Find the number of half-lives for `7//8` of the orignal sample to disintergrate.

Description : `Co^(60)` has half-life of `5.3` years. Find the number of half-lives for `7//8` of the orignal sample to disintergrate.

Last Answer : `Co^(60)` has half-life of `5.3` years. Find the number of half-lives for `7//8` of the orignal sample to ... yrs B. 9.2 yrs C. 10.6 yrs D. 15.9 yrs

1. Uranium eventually decays into a stable isotope of element? 2. Who is the author of the classic book Life Divine? 3. Who is the author of the book ‘Preparing for the Twenty first Century’? 4. Which type of volcanic eruptions is not usually exposive? 5. By whom were the triratnas were stressed?

Description : 1. Uranium eventually decays into a stable isotope of element? 2. Who is the author of the classic book Life Divine? 3. Who is the author of the book Preparing for the Twenty first ... of Seychelles located? 20. Theosophist, educationist and Indian' national leader'. To whom is this description?

Last Answer : Answer : 1. Lead 2. Aurobindo Ghosh 3. Paul Kennedy 4. Hawaiian 5. Mahavira 6. 206 7. Britain 8. 20 Hz 9. Ghana 10. Ilbari Turks 11. M1 + T.D 12. K.D. Yadav 13. A nerve 14. To avoid Aleutian Islands 15. Iltutmish 16. Bombay, Madras, Calcutta 17. Lead 18. Tennis 19. Indian Ocean 20. Annie Besant

`._(13)Al^(27)` is a stable isotope. `._(13)Al^(29)` is expected to disintegrate by

Description : `._(13)Al^(27)` is a stable isotope. `._(13)Al^(29)` is expected to disintegrate by

Last Answer : `._(13)Al^(27)` is a stable isotope. `._(13)Al^(29)` is expected to disintegrate by A. ... B. `beta`-emission C. positron emission D. proton emission

The isotope `._(92)^(235)U` decays in a number of steps to an isotope of `._(82)^(207)Pb`. The groups of particle emitted in this process will be:

Description : The isotope `._(92)^(235)U` decays in a number of steps to an isotope of `._(82)^(207)Pb`. The groups of particle emitted in this process will be:

Last Answer : The isotope `._(92)^(235)U` decays in a number of steps to an isotope of `._(82)^(207)Pb`. The groups ... C. `7 alpha, 4 beta` D. `10 alpha, 8 beta`

Uranium eventually decays into a stable isotope of — (1) Radium (2) Thorium (3) Lead (4) Polonium

Description : Uranium eventually decays into a stable isotope of — (1) Radium (2) Thorium (3) Lead (4) Polonium

Last Answer : (3) Lead Explanation: Natural uranium consists of three major isotopes: U238 (99.28% natural abundance), U235 (0.71%), and U234 (0.0054%). All three are radioactive, emitting alpha particles, with ... has 18 members, all of which eventually decay into Pb206, by a variety of different decay paths.

Uranium eventually decays into a stable isotope of element?

Description : Uranium eventually decays into a stable isotope of element?

Last Answer : Lead

Uranium eventually decays into a stable isotope of element.

Description : Uranium eventually decays into a stable isotope of element.

Last Answer : Lead

Uranium eventually decays into a stable isotope of – (1) Radium (2) Thorium (3) Lead (4) Polonium

Description : Uranium eventually decays into a stable isotope of – (1) Radium (2) Thorium (3) Lead (4) Polonium

Last Answer : Lead

The half-life of an isotope of an element is 5 days. The mass of a 10 gram sample of this isotope remaining after 20 days is: w) 0.312 grams x) 0.625 grams y) 1.25 grams z) 2.50 grams

Description : The half-life of an isotope of an element is 5 days. The mass of a 10 gram sample of this isotope remaining after 20 days is: w) 0.312 grams x) 0.625 grams y) 1.25 grams z) 2.50 grams

Last Answer : ANSWER: X -- 0.625 GRAMS

What fraction of an original sample of a radio isotope remains after 3 half-life periods?

Description : What fraction of an original sample of a radio isotope remains after 3 half-life periods?

Last Answer : One eighth remains.

What fraction of an original sample of a radio isotope remains after 3 half-life periods?

Description : What fraction of an original sample of a radio isotope remains after 3 half-life periods?

Last Answer : One eighth remains.

What name is given to the time taken for half the atoms in a sample of a radioactive isotope to decay?

Description : What name is given to the time taken for half the atoms in a sample of a radioactive isotope to decay?

Last Answer : Half-life

The decay constant for an `alpha-` decay of `Th^(232)` is `1.58xx10^(-10)s^(-1)`. How many `alpha-`decays occur from `1 g` sample in 365 days ?

Description : The decay constant for an `alpha-` decay of `Th^(232)` is `1.58xx10^(-10)s^(-1)`. How many `alpha-`decays occur from `1 g` sample in 365 days ?

Last Answer : The decay constant for an `alpha-` decay of `Th^(232)` is `1.58xx10^(-10)s^(-1)`. How many `alpha-` ... )` C. `2.219 xx 10^(19)` D. None of these

The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a GeigerMuller counter from its known quantity. If the half life period of aradioactive substance is one month, then(A) 3/4th of it will disintegrate in two months(B) It will completely disintegrate in two months(C) It will completely disintegrate in four months(D) 1/8th of it will remain intact at the end of four months

Description : The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a GeigerMuller counter from its known quantity. If the half life period of a ... in four months (D) 1/8th of it will remain intact at the end of four months

Last Answer : (B) It will completely disintegrate in two months

75% of a radioactive element decays in 6 hours. Its half life period is __________ hours. (A) 3/4 (B) 1/6 (C) 3 (D) 4

Description : 75% of a radioactive element decays in 6 hours. Its half life period is __________ hours. (A) 3/4 (B) 1/6 (C) 3 (D) 4

Last Answer : (C) 3

A sample of natural gas containing 80% methane (CH4 ) and rest nitrogen (N2 ) is burnt with 20% excess air. With 80% of the combustibles producing CO2 and the remainder going to CO, the Orsat analysis in volume percent is (A) CO2 : 6.26, CO : 1.56, O2 : 3.91, H2O :15.66, N2 : 72.60 (B) CO2 : 7.42, CO : 1.86, O2 : 4.64, N2 :86.02 (C) CO2 : 6.39, CO : 1.60, O2 : 3.99, H2O:25.96, N2 :72.06 (D) CO2 : 7.60, CO : 1.90, O2 : 4.75, N2 : 85.74

Description : A sample of natural gas containing 80% methane (CH4 ) and rest nitrogen (N2 ) is burnt with 20% excess air. With 80% of the combustibles producing CO2 and the remainder going to CO, the Orsat analysis in volume percent is (A) CO2 : 6 ... 96, N2 :72.06 (D) CO2 : 7.60, CO : 1.90, O2 : 4.75, N2 : 85.74

Last Answer : (B) CO2 : 7.42, CO : 1.86, O2 : 4.64, N2 :86.02

Pick out the wrong statement. (A) α-particle emission from a radioactive element makes it electrically negative (B) β-particle emission from a radioactive element makes it electrically positive (C) A radioactive element having a half life period of 20 years will completely disintegrated in 40 years (D) The disintegration constant of a radioactive isotope is independent of pressure, temperature or concentration

Description : Pick out the wrong statement. (A) α-particle emission from a radioactive element makes it electrically negative (B) β-particle emission from a radioactive element makes it electrically ... ) The disintegration constant of a radioactive isotope is independent of pressure, temperature or concentration

Last Answer : (C) A radioactive element having a half life period of 20 years will completely disintegrated in 40 years

What particle is emitted when Cobalt-60 decays to Nickel-60?

Description : What particle is emitted when Cobalt-60 decays to Nickel-60?

Last Answer : Answers is the place to go to get the answers you need and to ask the questions you want

Carbon l4 with a half life of 5,568 years is used to date a sample of wood. The sample has l/8 the carbon l4 contained in a living tree of the same species. Approximately how old is the specimen?

Description : Carbon l4 with a half life of 5,568 years is used to date a sample of wood. The sample has l/8 the carbon l4 contained in a living tree of the same species. Approximately how old is the specimen?

Last Answer : ANSWER: l6,704 YEARS

The half life of a radioactive element is 8-days. How long it take to reduce it from 10 mg to 5 mg? A. 4 days B. 12 days C. 16 days D. 8 days (Answer) E. None of these

Description : The half life of a radioactive element is 8-days. How long it take to reduce it from 10 mg to 5 mg? A. 4 days B. 12 days C. 16 days D. 8 days (Answer) E. None of these

Last Answer : D. 8 days (Answer)

The plasma concentration of IgA is (A) 1–5 mg/dl (B) 40–200 mg/dl (C) 60–500 mg/dl (D) 700–1,500 mg/dl

Description : The plasma concentration of IgA is (A) 1–5 mg/dl (B) 40–200 mg/dl (C) 60–500 mg/dl (D) 700–1,500 mg/dl

Last Answer : Answer : C

It is required to maintain a therapeutic concentration of 10 microgram/mL for 12 hours of a drug having half life of 1.386 hr and Vd of 5 L. The dose required in a sustained release product will be (A) 600 mg (B) 300 mg (C) 30 mg (D) 60 mg

Description : It is required to maintain a therapeutic concentration of 10 microgram/mL for 12 hours of a drug having half life of 1.386 hr and Vd of 5 L. The dose required in a sustained release product will be (A) 600 mg (B) 300 mg (C) 30 mg (D) 60 mg

Last Answer : (B) 300 mg

A radioactive element `X`, decays by the sequence and with half-lives, given below, `X underset(30"min")overset(alpha)(rarr) Y underset(2"days")overse

Description : A radioactive element `X`, decays by the sequence and with half-lives, given below, `X underset(30"min")overset(alpha)(rarr) Y underset(2"days")overse

Last Answer : A radioactive element `X`, decays by the sequence and with half-lives, given below, `X underset(30"min" ... D. The mass number of Y is greater than X

A photon of gamma radiation knocks out a proton from `""_(12)Mg""^(24)` nucleus to form a)The isotope of parent nucleus b)The isobar of parent nucleus

Description : A photon of gamma radiation knocks out a proton from `""_(12)Mg""^(24)` nucleus to form a)The isotope of parent nucleus b)The isobar of parent nucleus

Last Answer : A photon of gamma radiation knocks out a proton from `""_(12)Mg""^(24)` nucleus to form a)The isotope of ... )Na` D. the isobar of `._(11)^(23)Na`

3.0 ml of raw sewage is diluted to 300 ml. The D.O. concentration of the diluted sample at the beginning of the test was 8 mg/l. After 5 dayincubation at 20°C, the D.O. concentration was 5 mg/l. The BOD of raw sewerage is A. 100 mg/l B. 200 mg/l C. 300 mg/l D. 400 mg/l

Description : 3.0 ml of raw sewage is diluted to 300 ml. The D.O. concentration of the diluted sample at the beginning of the test was 8 mg/l. After 5 dayincubation at 20°C, the D.O. concentration was 5 mg/l. The BOD of raw sewerage is A. 100 mg/l B. 200 mg/l C. 300 mg/l D. 400 mg/l

Last Answer : ANS: C

If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is A. 100 mg/l B. 200 mg/l C. 300 mg/l D. 400 mg/l

Description : If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is A. 100 mg/l B. 200 mg/l C. 300 mg/l D. 400 mg/l

Last Answer : ANS: D

The half life of tritium is about: w) 3,500 years x) 40 years y) 12.3 years z) 3.7 years

Description : The half life of tritium is about: w) 3,500 years x) 40 years y) 12.3 years z) 3.7 years

Last Answer : ANSWER: Y -- 12.3 YEARS

If 4 gm of a radioisotope has a half life period of 10 days, the half life of 2 gm of the same isotope will be __________ days. (A) 5 (B) 10 (C) 20 (D) 30

Description : If 4 gm of a radioisotope has a half life period of 10 days, the half life of 2 gm of the same isotope will be __________ days. (A) 5 (B) 10 (C) 20 (D) 30

Last Answer : (B) 10

Fifty micrograms of an isotope have decayed to 12.5 micrograms after 12 hours. What is the half life of the radioisotope?

Description : Fifty micrograms of an isotope have decayed to 12.5 micrograms after 12 hours. What is the half life of the radioisotope? 

Last Answer : ANSWER: SIX HOURS

What is the half-life of carbon 12 isotope ?

Description : What is the half-life of carbon 12 isotope ?

Last Answer : Carbon -12 is a normal atom. It is not radioactive. C- 14 is radioactive. Its half -life is 5,630 years

Assertion (A) : Half life of a radioactive isotope is the time required to decrease its mass number by half Reason (R ) : Half life of radioactive iso

Description : Assertion (A) : Half life of a radioactive isotope is the time required to decrease its mass number by half Reason (R ) : Half life of radioactive iso

Last Answer : Assertion (A) : Half life of a radioactive isotope is the time required to decrease its mass number by half ... . If both (A) and (R ) are incorrect.

The half life of radioactive isotope is 3 hour. If the initial mass of isotope were 256 g, the mass of it remaining undecayed after 18 hr is a)12 g b)

Description : The half life of radioactive isotope is 3 hour. If the initial mass of isotope were 256 g, the mass of it remaining undecayed after 18 hr is a)12 g b)

Last Answer : The half life of radioactive isotope is 3 hour. If the initial mass of isotope were 256 g, the mass of it remaining ... 4 g B. 8 g C. 12 g D. 16 g

A radioactive isotope having a half life of 3 days was received after 12 days. It was found that there were 3 gm of the isotopes in the container. The

Description : A radioactive isotope having a half life of 3 days was received after 12 days. It was found that there were 3 gm of the isotopes in the container. The

Last Answer : A radioactive isotope having a half life of 3 days was received after 12 days. It was found that there were 3 gm of ... 48 g B. 36 g C. 24 g D. 12 g

The time required for half of the __________ of a radioactive isotope to decay is called its half life. (A) Nuclei (B) Electrons

Description : The time required for half of the __________ of a radioactive isotope to decay is called its half life. (A) Nuclei (B) Electrons

Last Answer : (A) Nuclei

A radioactive isotope has a half-life of 10 days. If today there are 125 g of it left, what was its original weight...

Description : A radioactive isotope has a half-life of 10 days. If today there are 125 g of it left, what was its original weight 40 days earlier  (a) 600 g (b) 1000 g (c) 1250 g (d) 2000 g 

Last Answer : Half life = 10days  The formula which is, 1/(2)^n × original weight = Weight left today.  To obtain the value of n = divide no of days by half life ie.,n= 40/10= 4 n=4 So, 1/(2)^n × original Weight = 125g 1/(2)^4 × Original weight = 125 Original weight = 16×125 = 2000g

Would you find the cotton on Q-tips as it was when it went in, or would it disintegrate after a very long time?

Description : Would you find the cotton on Q-tips as it was when it went in, or would it disintegrate after a very long time?

Last Answer : answer:You mean if some cotton got stuck in the wax inside an ear? It would come out with the wax and/or water from showering etc eventually, unless the wax flow got blocked, in which case it'd be ... more like a drawer than a compost heap, and that it'd tend to get cleared out before it decomposed.

How long for mothballs to disintegrate under the mobile home?

Description : How long for mothballs to disintegrate under the mobile home?

Last Answer : Feel Free to Answer

A radioactive sample has a half life 1500 years. A sealed tube conataining 1g of the sample will contain after 3000 years,

Description : A radioactive sample has a half life 1500 years. A sealed tube conataining 1g of the sample will contain after 3000 years,

Last Answer : A radioactive sample has a half life 1500 years. A sealed tube conataining 1g of the sample will contain ... g of the sample D. 0.01g of the sample

`C^(14)` has a half`-` life of 5760 years. `100mg` of the sample containing `.^(14)C` is reduced to `25mg` in a)11520years b)2880years c)1440years d)1

Description : `C^(14)` has a half`-` life of 5760 years. `100mg` of the sample containing `.^(14)C` is reduced to `25mg` in a)11520years b)2880years c)1440years d)1

Last Answer : `C^(14)` has a half`-` life of 5760 years. `100mg` of the sample containing `.^(14)C` is ... 11520 years B. 2880 years C. 1440 years D. 17280 years

What is the half life of 12 g sample of radioisotope that decayed to 6 g in 28 years?

Description : What is the half life of 12 g sample of radioisotope that decayed to 6 g in 28 years?

Last Answer : 28 years

The radioisotope , tritium `(""_(1)^(3)H)` has a half-life of 12.3 years. If the initial amount of tritium is 32 mg , how many milligrams of it would

Description : The radioisotope , tritium `(""_(1)^(3)H)` has a half-life of 12.3 years. If the initial amount of tritium is 32 mg , how many milligrams of it would

Last Answer : The radioisotope , tritium `(""_(1)^(3)H)` has a half-life of 12.3 years. If the initial amount of tritium is 32 ... A. 1 mg B. 2 mg C. 4 mg D. 8 mg

Cobalt (60) isotope is used in the treatment of which disease? (1) Heart diseases (2) cancer (3) diabetes (4) skin diseases

Description : Cobalt (60) isotope is used in the treatment of which disease? (1) Heart diseases (2) cancer (3) diabetes (4) skin diseases

Last Answer : (2) cancer Explanation: In cobalt-60 therapy, cobalt-60- generated gamma radiation is used to destroy tumors. Cobalt-60 therapy is also known as Gamma Knife® therapy.

Why are egg noodles (in the US) still packaged in those crisp bags that tear wide open and then disintegrate when you go to use them?

Description : Why are egg noodles (in the US) still packaged in those crisp bags that tear wide open and then disintegrate when you go to use them?

Last Answer : They do this to maximize profits when the packaging costs more than the contents.

Assertion: Platelets play an important role in blood clotting. Reason: In the blood oozing from an injury, the platelets disintegrate and release thro

Description : Assertion: Platelets play an important role in blood clotting. Reason: In the blood oozing from an injury, the platelets disintegrate and release thro

Last Answer : Assertion: Platelets play an important role in blood clotting. Reason: In the blood oozing from an ... D. If both Assertion & Reason are false.

Why do meteoroids usually disintegrate?

Description : Why do meteoroids usually disintegrate?

Last Answer : Need answer

What does it mean to disintegrate?

Description : What does it mean to disintegrate?

Last Answer : It means to deteriorate, decompose, or come apart.Examples:"The medical examiner had a hard time getting an ID because the corpse had completely disintegrated.""Cheating and finances are two things that make families disintegrate."

Choose the incorrect statement from the following: (a) The nuclear becomes weak if the nucleus contains too many protons compared to the number of neutrons (b) The nuclear force becomes weak if the nucleus contains too many neutrons compared to the number of protons (c) Nuclei with atomic number greater than 82 show a tendency to disintegrate (d) The nuclear force becomes very strong if the nucleus contains a large number of nucleons.

Description : Choose the incorrect statement from the following: (a) The nuclear becomes weak if the nucleus contains too many protons compared to the number of neutrons (b) The nuclear force becomes weak if the ... (d) The nuclear force becomes very strong if the nucleus contains a large number of nucleons.

Last Answer : Ans:(d)

If mammalian ovum fails to get fertilised, which one of the following is unlikely? (a) Corpus luteum will disintegrate. (b) Progesterone secretion rapidly declines. (c) Estrogen secretion further increases. (d) Primary follicle starts developing.

Description : If mammalian ovum fails to get fertilised, which one of the following is unlikely? (a) Corpus luteum will disintegrate. (b) Progesterone secretion rapidly declines. (c) Estrogen secretion further increases. (d) Primary follicle starts developing.

Last Answer : (c) Estrogen secretion further increases.

Pick up the correct statement from the following: (A) Lime in excess, causes the cement to expand and disintegrate (B) Silica in excess, causes the cement to set slowly (C) Alumina in excess, reduces the strength of the cement (D) All the above

Description : Pick up the correct statement from the following: (A) Lime in excess, causes the cement to expand and disintegrate (B) Silica in excess, causes the cement to set slowly (C) Alumina in excess, reduces the strength of the cement (D) All the above

Last Answer : Answer: Option D

Pick up the correct statement from the following: (A) The lime in excess makes the cement unsound and causes the cement to expand and disintegrate (B) The silica in excess makes the cement stronger but its setting time also increases (C) The excess amount of alumina weakens the cement (D) All the above

Description : Pick up the correct statement from the following: (A) The lime in excess makes the cement unsound and causes the cement to expand and disintegrate (B) The silica in excess makes the cement stronger ... time also increases (C) The excess amount of alumina weakens the cement (D) All the above

Last Answer : Answer: Option D