10. Technetium-99 is an ideal radioisotope for scanning organs because it has a half-life of 6.0 hours and is a pure gamma emitter. Suppose that 80.0 mg. were prepared in the technetium generator this morning. How many milligrams would remain after: a. One half life b. 18 hours c. Two half lives d. 24 hours

Q: (b) Draw a vapour pressure/temperature curve and discuss the phase rule.

A: A phase is a chemically homogeneous, physically separate, and mechanically separable portion of…

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: A refining and petrochemical plant wastewater has three operations involving continuous water supply…

A: Given : OperationMass flow rateInlet concentrationoutlet…

Q: Key to the thermodynamic analysis of a cycle is remembering
U = 0 and
S = 0 a) Why is this true?…

A: The statement ΔU = 0 and ΔS = 0 is true for a cyclic process because in a cycle, the system returns…

Q: 3) Consider a binary, multi-stage distillation column. The molar enthalpies of saturated vapour and…

A: given = hl = 6.0 KJ/mol hV = 41 KJ/mol CP,l = 68 J/mol.K and CP,V = 22 J/mol.K WKT quality of feed…

Q: Please consider a binary Propane/n-Pentane feed stream that is 0.35 alo Propane. The stream is to be…

A: Given:  Binary propane/n-pentane feed stream that is 0.35 % propane flashed at 60 psia (4.137 bar)…

Q: The wall of a furnace is made up of 9.5 in. firebrick (k=0.72 Btu/hr-ft-'F) 5.3 in. of insulating…

A: We are given the follwing information:   Firebrick wall thickness = LA = 9.5 in thermal conductivity…

Q: Which of the following is a good hypothesis when someone observes there is more traffic in the…

A: Correct hypothesis from the given options to be chosen.

Q: Samples A and B are at different initial temperatures when they are placed in a thermally insulated…

A: The specific heat of sample A is to be calculated.

Q: 2) Number of Ideal Stages for a Hydrocarbon Distillation A four component mixture of ethylbenzene…

A: Component Feed Distillate Bottom  αi Ethylbenzene 0.06×80 = 4.8 4.8 - 1.25 p-xylene 0.4×80 = 32…

Q: The radioisotope 224Ra decays by α emission primarily to the ground state of 220Rn (94% probability)…

A:

Q: A closed system can exchange energy with its surroundings through heat and work Select one: True…

A: A closed system can exchange energy with its surroundings through Heat and WorkAnswer is True

Q: 3. Low density polyethylene (LDPE) is produced in a long tubular reactor under harsh conditions (T =…

A: Given :Temperature Pressure Reactor diameter Reactor length

Q: A mixture of 3 components in 2 phases are present. You are given the temperature and pressure. How…

A: Given,the number of components in the system is, The number of phases present in the mixture is,…

Q: Combustion of 1 g of gasoline releases 11.5 kcal of energy. How many kilojoules of energy is…

A: The amount energy released is to be calculated in kilojoules and joules.

Q: 3. Calculate the enthalpy and entropy changes of iron in the FCC structure when it is brought,…

A:

Q: Step 12 23 34 41 12341 AUTJ -200 ? ? 4700 ? Q/J ? -3800 -800 ? ? WIJ -6000 ? 300 ? -1400

A: Given:1. A closed system's one mole of gas passes through a four-step thermodynamic cycle.To…

Q: 1) The state of system changes, its internal energy (a) must change (b) must not change (d) the…

A: Change in Internal Energy is the difference between  the Product Internal Energies and Reactant…