The half-life of Carbon-14 is 7 years. How much of an initial 168 g sample will remain after 30 years?

Q: A 416 g sample of sodium-24 decays to 13.0 g of sodium-24 within 60.0 hours. What is the half-life…

A: Given data: The initial quantity is N0=416 g. Quantity after decay is N(t)=13.0 g. Time elapsed is…

Q: The half life of an unknown substance is 1 week. How much of its nuclei were disintegrated after 10…

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Q: What is the mass number of an alpha particle?

A: Mass number is the total number of nucleons. It is the sum of number of protons and neutrons.

Q: A radioactive sample has a half-life of 10 minutes. What fraction of the sample is left after 40…

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Q: If you are told the half life of a material is 3,500 years, then how much would be remaining from a…

A: Given data: Half life (t1/2)= 3,500 years Initial quantity of the substance (N0) = 10 g Time elapsed…

Q: One of the radioactive nuclides formed in nuclear power plants is hydrogen-3, called tritium, which…

A: According to theroy of Radioactivitythe decay rate of a nuclei which has initially N0 nuclei  at any…

Q: The half-life of uranium-234 is approximately 25,000 years. How many undecayed nuclei remain after…

A: number of uranium atoms = 2.7 billion = 2.7×109 atoms half life of uranium = 25000 years =…

Q: The half life of Thorium is 75,000 years. How much of the substance will be left after 3 half lives

A: Let initial amount of substance is m. The half life is T= 75000 years.

Q: Q6: 100 g of radioactive element X are placed in a sealed box. The half-life of this isotope of X is…

A: Disclaimer: Since you have posted two questions and no specific question number is mentioned, we…

Q: When a nucleus of emits an alpha particle, what are the atomic number and the atomic mass of the…

A: In alpha decay, an unstable nucleus will emit an alpha particle, which is a helium nucleus composed…

Q: How many protons are in the nucleus of an antimony atom

A: An atom mainly consists of two parts: nucleus and electron orbits. In the nucleus, there are two…

Q: How many alpha particles are emitted per second from 1 microgram of radium?

A: we know that,  1C= Activity of 1 g of Radium=3.7×1010 days

Q: A radioactive material decays at a rate proportional to its amount . If the material has a half-life…

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Q: A sample containing 1 gram of Radium-224 was stored in laboratory 100 years ago. Now the sample…

A: Given data: The mass of Radium-224 at 100 years ago is m0=1 g. The mass of Radium-224 at now is…

Q: Krypton-79 has a half-life of 35 h. How many half-lives have passed after 105 h?

A: Krypton-79 has a half-life of 35 h. How many half-lives have passed after 105 h?

Q: The isotope carbon-14, 14/6C, is radioactive and has a half-life of 5 730 years. If you start with a…

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Q: The half-life of a particular element is 330 days. What is its decay constant?

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Q: The half-life of scandium-46 is 83.9 days. How much of a 9.0–oz sample of scandium-46 will remain…

A: Given data The half-life of the scandium-46 is t1/2 = 83.9 days. The initial amount of the…

Q: A quantity of a radioactive element gives 1,200 alpha particles every 60 seconds, and after 120…

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Q: When thorium decays by emitting a beta particle, what is the atomic number of the resulting nucleus?

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Q: Zirconium has an HCP crystal structure and density of 6.51 g/cm³, what is the volume of its unit…

A: Given, Zirconim has an HCP crystal structure and density of ρ = 6.51 gcm3

Q: Uranium has a half-life of 4.47 billion years! How long does it take for a sample of 100 grams to…

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Q: A sample of polonium-208 has a half-life of 2.898 years. What percent of polonium-208 remains after…

A: The half-life of a radioactive substance is the time required for a quantity to reduce to half of…

Q: The density of nuclear matter is about 1018 kg/m3. Given that 1 mL is equal in volume to cm3, what…

A: The given density of the nuclear matter is

Q: Polonium-215 has a half-life of 0.0018 seconds. What is its mean lifetime?

A: Half-life of polonium is 0.0018 seconds,

Q: If you dispense 0.3 grams of aspirin, how many milligrams are you giving?

A: CONCEPT: Method of conversion of unit is used to find required value. 1 g=1000 mg where g is gram…

Q: How many neutrons are in uranium-235?

A: The number of protons equals the atomic number. The number of protons and neutrons together…

Q: A radioactive substance plutonium-239 has a half-life of 24,000 years. Initially, there is 700 mg of…

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Q: A clinical technician finds that the activity of a sodium-24 sample is 1,024 cpm. What will be the…

A: Half life is defined as the time required for the radioactivity of a radioactive element to drop to…

Q: f the half-life of cesium-137 is 30 years, approximately how much time will be required to reduce a…

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Q: A radioactive isotope has a half-life of 51.5 days. What fraction of the isotope remains after 413…

A: We have: The half-life is t1/2=51.5 days Calculating the first-order reaction constant k as…

Q: The half-life of Uranium-237 is 5.83 x 105 If you have a sample with 5.89 x 1024 atoms in it, how…

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Q: The half-life of a particular radioactive isotope is 6.5 h. If there are initially 48 * 1019 atoms…

A: Given:  Half life of isotope, T = 6.5 hours  Initial number of atoms, No = 48 x 1019 atoms  Total…

Q: Suppose you are designing a proton decay experiment and you can detect 50 percent of the proton…

A: In a proton decay experiment 50 percent of proton decay in a tank of water is detect.

Q: The half-life of a certain chemical in the human body for a healthy adult is approximately 3h. What…

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Q: A sample of a radioactive element has a half-life of 180 days; what percent of this sample will…

A: The decay constant of a radioactive sample is given by :  The amount of sample left after 't' time…

Q: Carbon 14, with a half-life of 5700 years, is used to estimate the age of organic materials. What…

A: The expression for the half-life of carbon-14 is written as, Here, λ represents the decay constant…

Q: One second is defined as the time it takes for the radiation from a Cesium – 133 atom to  complete…

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Q: A sample of carbon-14 has been decaying for 22 920 years and is now 35,0 grams. (The half life of…

A: Given: Decaying year T = 22920 years, Present Mass of carbon-14 Nt = 35.0 g. Half life of C-14 T1/2…

Q: If the element Europium is 276 grams then how many atoms would it have?

A: Natoms=NAvamMmolar

Q: A scientist discovers a new isotope, exponentialitium. The scientist sets aside 150 grams of…

A: The amount of time required to fall the amount of a radioactive element to half is called the…

Q: A radioactive element has a half-life of 33 years. What is its continuous rate of decay?

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Q: A radioactive isotope of silver has half-life of 20 minutes. What fraction of the original mass…

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Q: The half-life of the radioactive isotope cesium-137 is 30.17 years. How long (in years) does it take…

A:

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.