Americium-241 is used in some smoke detectors. It is an alpha emitter with a  half-life of 432 yearsyears. How long will it take in years for 39.0 %% of an Am-241 sample to decay?

Q: 4. The radioactive element, thallium - 201, is used medicinally as a radiotracer to study damage in…

A:

Q: A proton is accelerated to 64.2 MeV per particle. What is this energy in kJ/mol?

A: Since two different question are given so according to guidelines only first one will be answered…

Q: 1. Consider a case in which you have a material that support a certain stress at 75°C and you have…

A: Differential Scanning Calorimetry or DSC is a traditionally common method used to estimate…

Q: Alcohol-water mixtures (MeOH-water) Do the numbers on the x-axis refer to mole fraction of methanol…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: 8. Tantalum (BCC) has an atomic weight of 180.948 amu and an atomic radius of 0.146 nm. Calculate…

A: Step 1:The formula d= ZMwt/a3Na  Step 2: Step 3: Step 4:

Q: The half-life of radium-226 is 1.8 x 1013 years.  a) Calculate k in per day. b) What is the…

A: Write the relation between rate constant and half-life as follows: k = 0.693t1/2     ......(1)…

Q: A2.45-MeV neutron is elastically scattered through an angle of 41 degrees in a collision with a "He…

A: Given-a 2.45 MeV neutron elastically scattered by H4e at 41oangleTo find-change in lethargy of the…

Q: The absorbances of solutions containing K2CrO4 in 0.05 M KOH were measured in a 1.0 -cm cell at 375…

A: The relation between concentration and absorbance is given by Beer's law. There will be absorbance,…

Q: Calculate the activation energy for vacancy formation in aluminum, given that the equilibrium number…

A: For aluminum, number of atoms in a mol are: NA=6.023×1023 atoms/ mol Atomic weight of aluminum,…

Q: Why is sulfur an undesirable impurity in a fuel?

A: Reason-In fuel sulphur is considered as undesirable impurity.

Q: Which type of reaction produces the highest temperature? * O fusion O chemical O fission none of…

A: fission and fusion both are physical process which produces high amount of energy from atom.Fusion…

Q: produced. Suppose you walk out of your room and leave your 100-W light on for 1 hour. If your…

A: Given, power of bulb = 100 WTime of use = 1 hour = 1*3600 s = 3600sNow, energy consumed = Power *…

Q: The elemental analysis of the gas is burned in the bomb calorimeter. C = 80%, H = 9%, O = 10.9%, N =…

A: In the combustion process, the calorific value is the measurement of the heat value or amount of…

Q: Differentiate petroleum ether and sulfuric ether in terms of composition

A: To answer the three given questions in one sentence each

Q: It is conceivable for the waste gas to have a higher nitrogen content than the converter gas. true…

A: Converter gas has very high content of carbon monoxide (CO) due to which it is very harmful. It has…

Q: The radioactive isotope 238U has a half-life of 4.5 billion years. How long (in billions of years,…

A: Given that t1/2 =4.5 billion years =4.5 ×109 yearsx=0.29

Q: Coal fired in a furnace analyzes 16.6% VCM, 16% ash, 61.4% FC, 6% M. 1.2%N and 1.8% S with a…

A:

Q: 3.) At room temperature the electrical conductivity of PbTe is 500 (N-m)1 whereas the electron and…

A: Given: σi = 500 (Ω-m)-1 μn = 0.16 m2/V-s μp = 0.075 m2/V-s ni = ? We know that, σi = ni q [ μn + μp…

Q: What is the rationale behind assigning a thermal equivalent for each renewable source? (i.e. why…

A: a). What is the rationale behind assigning a thermal equivalent for each renewable source of energy…

Q: Refer to the ternary phase diagram in Fig. 5E.4. a.) How many phases does a mixture of these liquids…

A: The phase diagram gives the number of possible phases of the mixture. This diagram also explains the…

Q: What will be the analysis of combustion gases if carbon is burned with 30% excess air?

A: Hi and thanks for the question. Since you have posted multiple questions and didn't specify which…

Q: Coal has the following analysis: carbon = 75%, hydrogen 5%, oxygen 6%, nitrogen = 1.5%, sulfur = 3%,…

A: Coal has following ultimate analysis as given below. C=75%, H=5%, O=6%, N=1.5%, S=3%, H2O=1.5%,…

Q: nalysis of a rock sample shows that it contains 0.42 mg of 40Ar for every 1.00 mg of 40K. Assuming…

A: The rock sample = 0.42 mg of 40Ar for every 1.00 mg of 40K Number of 40Ar atoms is given as, (4.2 x…

Q: The dry analysis of combustion of C4H10 per 100 kmol of DRY Products:y =5.5 kmol, e=86.6 kmol,…

A: a(C4H10) + b(02+3.76 N₂)  -------------->  x(CO2) + y(CO) + e(N2) + d(H₂O) y =5.5 k.mol e=86.6…

Q: Explain how low octane naphtha is converted into high-quality motor fuels ?

A: low Octane naphtha Converted to high quality motor fuel  by continuous Catalytic and reforming unit.…

Q: Q2 Phosphorus-32 (P-32) is used in nuclear medicine as a therapeutic agent in the treatment of…

A: Given data: Half-life of P-32=14.3 days Initial activity=1MBq (106 transitions/sec) Sample is…

Q: The pre-exponential factor and activation energy for the following molecular ion reaction are 4 *…

A: The value of change in entropy, enthalpy, and Gibbs free energy are to be determined for the given…

Q: lodine-131 is one of the most important isotopes used in the diagnosis of thyroid cancer. One atom…

A: Given, One atom has a mass of 130.906114 amu No. of protons = 53 No. of nucleons (proton+neutron) =…

Q: 1. The activation energy for diffusing copper in nickel is 2.7 x 10-5 m²/s and the activation energy…

A: Note: Since you have posted multiple questions, we will provide the solution only for the first…

Q: Refer to the ternary phase diagram in Fig. 5E.4. a.) How many phases does a mixture of these liquids…

A: Single-phase and two phases exist in three components mixture. The equilibrium of these three…

Q: Do you think that our consumption of fossil energy did affected the climate? How shall we act to fix…

A: It is to be mentioned whether consumption of fossil energy affects climate or not and how to fix it.

Q: A 1 cm diameter, thin-walled tube carries liquid metal through saturated water at one atmosphere.…

A: Given: Tube diameter is 1 cm (0.01 m) Radius (R) is 0.005 m Metal temperature is 250°C Heat transfer…

Q: Explain why the potential energy release from a reactor accident is not com- parable to that of a…

A: A nuclear power plant's core is its nuclear reactor. They both contain and regulate nuclear chain…

Q: UF6 is a compound used in the process of enriching uranium. Use the attached thermodynamic data to…

A: In thermodynamics, the Gibbs free energy is a thermodynamic potential that is given by G = H − TS,…

Reaction Kinetics

For a chemical reaction, the part of chemistry dealing with the speed as well as the rate of reaction is known as reaction kinetics. Reaction kinetics is also known as chemical kinetics