Description : If a sample that originally contained grams of C14 has gone through two half-lives of decay how much C14 will be left?
Last Answer : 2.5
Description : What is the half life of 3 g sample of radioisotope that decay to 0.75 g in 30 days?
Last Answer : 15 days
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
Description : X210 has half life of 5 day. What is the time taken for seven-eights of sample of X210 to decay?
Description : 1. Who has the final power to maintain order within the House of People ? 2. X210 has half life of 5 day. What is the time taken for seven-eights of sample of X210 to decay? 3. What is ... an important condition for growth of coral? 20. Where was the Arya Samaj setup for the first time in 1875 ?
Last Answer : Answer : 1. Speaker 2. 15 days 3. A drilling ship in Bombay High 4. U.S.A. 5. Cotton textiles 6. Bachendri Pal 7. Nodulated root 8. President 9. Chile 10. Nur Jahan 11. 5 12. ... coast 15. Dayanand Saraswati 16. Chloramphenical 17. Lord Ripon 18. Helium nuclear 19. Wave-free salt water 20. Bombay
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
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
Description : Consider the following decay series: `A to B to C to D` Where, A,B and C are radioactive elements with half lives of 4,5 sec, 15 days and 1 sec respec
Last Answer : Consider the following decay series: `A to B to C to D` Where, A,B and C are radioactive elements with half ... mol of C, 1/4 mol of D and noen of A
Description : What would be the reduction potential of an electrode at 298 K , which originally contained ` 1K_(2)Cr_(2)O_(7)` solution in acidic buffer solution of
Last Answer : What would be the reduction potential of an electrode at 298 K , which originally contained ` 1K_(2)Cr_(2)O_(7)` ... V` C. `1.187 V` D. None of these
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
Description : If a radioactive sample has decayed until only one eighth of the original sample remains unchanged how many half-lives have elapsed?
Last Answer : 3
Description : What is the use of half lives to determine the age of a sample?
Last Answer : Carbon-dating
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
Description : How many moles of CH4 are contained in 96.0 grams of CH4 ?
Last Answer : The molecular mass will be 12 + (1x4) because carbon's Atomic Mass is 12 and hydrogen's atomic mass is 1. That gives you a molecular mass for methane of 16. 1 mole of methane will be 16g All you need to do now is divide your 96.0 g of methane by 16g and you will get the number of moles you want.
Description : The molecular weight of H2SO4 is 98. How many grams of H2SO4 are contained in 1 liter of a 1 Normal solution?
Last Answer : ANSWER: 49 grams of H2SO4
Description : If you start with 24 grams of a radioactive element with a half-life of one month, how many grams of the radioactive element will be left after 2 months? w) 1.5 grams x) 3 grams y) 6 grams z) 12 grams
Last Answer : ANSWER: Y -- 6 GRAMS
Description : Monazite sample contains 9% `ThO""_(2)` and 0.35% `U""_(3)O""_(8).Pb""^(208)` and `Pb""^(206)` are the stable and products in the radioactive decay se
Last Answer : Monazite sample contains 9% `ThO""_(2)` and 0.35% `U""_(3)O""_(8).Pb""^(208)` and `Pb ... C. It is a fertile material D. It belongs to 4n series
Description : A sample of radioactive material has mass `m`, decay constant `lambda`, and molecular weight `M`. Avogadro constant `=N_(A)`. The initial activity of
Last Answer : A sample of radioactive material has mass `m`, decay constant `lambda`, and molecular weight `M`. Avogadro constant ... N_(4))/(M)` D. `mMe^(lambda)`
Description : What is the total number of atoms contained in a 1.00 mole sample of helium?
Last Answer : The total number of atoms contained in a 1,00 mole sample ofhelium is 6,022 140 857.10e23.
Description : Three pirates, One Eye, Long John, and Peg Leg, were gambling with pieces of gold. All the winnings were piled up on the table. One Eye said, 'I have won 1/2' and took a large handful or two. Long ... ' Peg Leg said, 'I have now 1/6 of the originally.'How much was on the table originally? -Riddles
Last Answer : 282 Pieces.
Description : PROBLEM FA sample of soft saturated clay weighs 350 grams and has a volume of 205cc. After oven drying, the soil weighs 225 grams. Calculate the values of saturated unit weight, void ratio, porosity and specific gravity?
Last Answer : {
Description : If a sample of pure sodium has a mass of 8.2 grams and sodium has an average atomic mass of 22.99 gmol how many sodium atoms are there in the sample?
Last Answer : Need answer
Description : If the sample has 2 Grams of water vapor what would the relative humidity be?
Last Answer : What is the answer ?
Description : What will be the pressure of a sample of 48.0 grams of oxygen gas in a glass container of volume 5.2 L at 25 and degC?
Description : What will be the pressure of a sample of 48.0 grams of oxygen gas in a glass container of volume 5.2 L at 25 degrees Celsius?
Last Answer : PV = nRTP = pressure = ?V = volume = 5.2 Ln = moles of gas = 48 g x 1 mole/32 g = 1.5 moles O2 gasR = gas constant = 0.0821 L-atm/K-moleT = temperature in K = 25 + 273 = 298 KSolving for P = nRT/V = (1.5)(0.0821)(298)/5.2P = 7.0 atm (to 2 significant figures)
Description : A money order returned from a foreign country of payment as not payable a) The sender will paid the value of the money order as actually paid in Indian currency at the time of issue without the ... MO without the MO commission d) The sender will be paid the value of the MO and half commission
Last Answer : a) The sender will paid the value of the money order as actually paid in Indian currency at the time of issue without the commission originally collected
Description : Amanda Gorman has gone from being our poet laureaute to having to prove that she lives where she says she does. What do you think?
Last Answer : I still have yet to fact check this.
Description : On the death of Gandhiji, who said that “The light has gone out of our lives…..”? -Do You Know?
Last Answer : answer:
Description : On the death of Gandhiji, who said that “The light has gone out of our lives…..”?
Last Answer : Jawaharlal Nehru
Description : How much cesium Half-Life2 years would remain from a 10 G sample?
Description : What is the half-life of the Rubidium-87 / Strontium-87 decay chain?
Last Answer : http://answers.yahoo.com/question/index?qid=20091020104308AAsZVxB Rb 87 half life = 5*10^11 years Sr 87 half life = 2.83 hours
Description : Can the decay half-life of a radioactive material be changed? -Physics
Last Answer : Yes, the decay half-life of a radioactive material can be changed. Radioactive decay happens when an unstable atomic nucleus spontaneously changes to a lower-energy state and spits out a bit of ... radiometric dating are so accurate because decay half-lives in nature are so close to constant.
Description : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay process are `tau = 1// lambda` and `t_(1//2) = 0.693//lamb
Last Answer : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay process are `tau = 1// ... `tau = (t_(1//2))/(0.693)`
Last Answer : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay process ... on the amount of element not yet decayed
Last Answer : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay process are `tau = 1 ... B. 53 yrs C. 530 yrs D. 5300 yrs
Last Answer : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay ... exponentially C. parabolically D. all of these
Last Answer : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay ... lambda` depend on the nature of radioactive element
Description : If the relation between time of decay (t) and half life period `(t_(1//2))` is `(t = 4 t_(1//2))`, the relation between r and mean life (T) is:
Last Answer : If the relation between time of decay (t) and half life period `(t_(1//2))` is `(t = 4 t_(1//2))`, the ... `27^(4)` In 2 C. 4 T In 2 D. 2T In 2
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
Description : Half life is a term used to describe a) The penetrating ability a gamma source b) Half the total time a gamma source will be useful c) The time taken for the gamma source to reduce the strength by half d) The rate of decay of an X-ray tube
Last Answer : c) The time taken for the gamma source to reduce the strength by half
Description : The pressure exerted by an ideal gas is __________ of the kinetic energy of all the molecules contained in a unit volume of gas. A.one-half B.one-third C.two-third D.three-fourth
Last Answer : Answer: C
Description : If the length of a wall on either side of a lintel opening is at least half of its effective span L, the load W carried by the lintel is equivalent to the weight of brickwork contained in an equilateral triangle, producing a maximum bending moment (A) WL/2 (B) WL/4 (C) WL/6 (D) WL/8
Last Answer : Answer: Option C
Description : Spent fuel from a nuclear power plant cools down and loses most of its radioactivity through decay. In the first year, spent fuel loses about what percentage of its radioactivity? w) 10 percent x) 50 percent y) 80 percent z) 100 percent
Last Answer : ANSWER: Y -- 80 PERCENT
Description : Vasopressin and oxytocin circulate unbound to proteins and have very short plasma half lives, on the order of (A) 1–2 minutes (B) 2–4 minutes (C) 5–8 minutes (D) 10–12 minutes
Last Answer : Answer : B
Description : When the same dose of a drug is repeated at half life intervals, the steady-state (plateau) plasma drug concentration is reached after: A. 2–3 half lives B. 4–5 half lives C. 6–7 half lives D. 8–10 half lives
Last Answer : B. 4–5 half lives
Description : Mortal Kombat was originally developed as a licensed game version of what popular movie before the licensing deal fell through, and the game was released independently? -Gaming
Last Answer : Mortal Kombat is an American media franchise centered on a series of video games, originally developed by Midway Games in 1992.
Description : The figure shows the front view of a convex lens, which originally had only one edge. Five holes of different shapes, namely triangle, square, pentagon, hexagon and circle, were drilled through it at points P ... . What is the total number of edges in the lens after the holes were drilled?
Last Answer : 57
Description : How many grams is 1 and a half cup of confectionery sugar?
Last Answer : Feel Free to Answer