Plutonium decays at a rate which is proportional to quantity available with us. In the lab conditions, it was observed that 50 kilograms of plutonium has lost its 10 percent of its original mass after a period of 2 hours. Find (a) the plutonium mass that will be present after 4 hours, and (b) Estimate the time required for plutonium to decay to one half of its initial mass.

Q: 9. Initially 100 milligram of a radioactive substance was present. After 8 hours the mass had…

A: Given data: Ci=100 mgAfter t= 8 hC=100-4=96 mg

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: 8 of 48 Which is the best illustration of the Second Law of Thermodynamics? coal changes into a…

A: The physical quantities such as temperature, pressure, entropy, and energy are having a relationship…

Q: Q1/Estimate the liquid density of Aniline (C H,N) at its boiling point? Molecular mass =93 *

A: Boiling point: It is the temperature at which the vapor pressure of a liquid becomes equals to…

Q: A gas mixture consists of equal masses of methane (molecular weight 16.0) and argon (atomic weight…

A: Given  Molecular weight of methane =16 Molecular weight of Argon = 40.0 Partial pressure of Argon =…

Q: Carbon from the remains of an extinct Australian marsupial, called Diprotodon, has a specific…

A: Given that: A carbon form diprotodon is extinct. The current specific activity of diprotodon…

Q: To determine the calorimeter constant of a coffee-cup calorimeter, 28 g of cold water was placed in…

A:

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: Calculate the solubility of MNCO3 (in mol/L) in the following. Assume the Ksp of MNCO3 = 1.8 x…

A: Ksp=1.8x10-11 MnCO3s⇔Mn2++CO3-2 Ksb=Mn2+CO32- At equilibrium  Mn2+=S CO32-=S a) In water Ksp=S2…

Q: Calculate the amount of heat necessary to raise 92.7 g of water from 26.3 °C to 174.3 °C. the molar…

A: Given:  T1 = 26.3 C = (26.3 + 273) K = 299.3 K T2 = 174.3 C = (174.3 + 273) K = 447.3 K  Cp = 18 cal…

Q: In a nuclear reaction, the total mass loss is 0.01 amu; then the energy released is? A. 931 MeV B.…

A:

Q: Calculate the number of vacancies per cubic meter in iron at 855 °C The energy for vacancy formation…

A: Given  Temperature = 855 oC                         = 1128.15 K Density = 7.65 g/cm3 Atomic weight =…

Q: :Example 5.2. Estimate the theoretical volume of gas that will be generated in a sanitary landfill…

A:

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: Calorimetry can be used to measure enthalpy of a reaction and Hess's Law involves adding equations…

A: Using HESS law: Complete combustion of CH4 is given as CH4+2O2→CO2+2H2O Enthalpy for this reaction…

Q: A fuel oil is burned with 65% excess air, and the combustion characteristics of the fuel oil are…

A:

Q: The half-lives of 235U and 238U are 7.04 × 10° years and 4.47 × 10° years, respectively, and the…

A: Given the half-life of U-235 is 7.04.*108 and that of U-238 is 4.47*109 years. The present abundance…

Q: A stream of gas is to be dried by cooling the stream through a cool drying process. The feed stream…

A:

Q: Use the following information to fill in the blanks below. Upon combustion, a 10.582 g sample of a…

A: Sample Weight = 10.582 g CO = 226.9760 g H2O = 6.8940 g

Q: An element has three naturally occurring isotopes with the following masses and abundances: Isotopic…

A: The atomic mass of the element is to be calculated along with the identity.

Q: dead body is found in a room with air temperature of 18 ̊C, and the body’s surface temperature…

A: Step 1:Step 2:Step 3:Step 4:

Q: A 1040kg iron bar with a length of 2.00m and temperature of −45.25˚C is immersed in 50kg of liquid…

A:

Q: You devise a new temperature scale based on the properties of the liquid propylene glycol, which has…

A:

Q: a. The operators had no idea how much excess air was needed. What do you tell them? b. You need to…

A:

Q: Galvanized steel roofing is becoming more common, and the emissivity of this material is about 0.13…

A:

Q: The diesel has a chemical formula C16H30 with 20% excess air. Find the actual mass of air per mass…

A: Fuel: C16H30 20% excess air is used. The reaction for the complete combustion of the given fuel is…

Q: Propane gas is diffusing in a straight tube 0.1 m long containing helium at 298K and a total…

A: Given Length of tube L = 0.1 m Total pressure of Propane gas =1.01325×105Pa PA1=1.5×104Pa PA2 = 1.2…

Q: chlorine consists of the following isotopes:  WHAT IS THE ATOMIC MASS OF CHLORINE?   ISOTOPIC…

A: The atomic mass of chlorine-35 and chlorine-37 is denoted by M35  and M37 , respectively. The…

Hazard Analysis and Design in Chemical Engineering

Hazard is the intrinsic property of a material or process which harms the people, buildings, or environment. Health, safety, hazard, risk assessment, loss prevention, and environmental consideration play an important role while designing a chemical processing plant. Hazard is often confused with risk. Risk measures the magnitude of loss and injury of likelihood incidents or the consequence and frequency of incidents.