After 2.00 y, 1.986 g of a radioisotope remains from a sample thathad an original mass of 2.000 g.a. Calculate the half-life.b. How much of the radioisotope remains after 10.00 y?

Q: complete the following table for aqeuous solution of potassium hydroxide. show complete solution.…

A: Molar mass of KOH = 56.11 g/mole Molar mass of H2O = 18.02 g/mole Density of solution = 1.43 g/ml…

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 moon rock collected by a U.S. Apollo mission is estimated to be 3.90 billion years old by…

A: Mass of P206b in the rock is asked.

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: CHEMISTRY FOR ENGINEERS  (UPVOTE WILL BE GIVEN. PLEASE WRITE THE COMPLETE SOLUTIONS LEGIBLY. NO LONG…

A: Given that- Mass of ozone (O3) in stratosphere is 3 billion kilogram so as m=3 billion kg    =3×109…

Q: Calculate the energy of an electron with mass 9.109 × 10-31 kg confined in a two-dimensional box…

A: mass of the electron, m=9.109×10−31 Kg the electron is confined in the 2D block side length of the…

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

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: Radioactive decay is a process that follows a first-order rate law: Rate = kN, where N is the…

A:

Q: Plot the Gaussian distribution function for the end-to-end distance for M =135,000 g/mol poly(1,4-…

A:

Q: 25. What is the entering concentration of nitric acid? a) 0.145 mole/dm3    b) 0.326 mole/dm3   c)…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: A molecule A B with bond distance of 1,669 A, convert the bond distance into Bohn radius unit a O a.…

A: we know that,  Bohr radius Unit ao at 1.669 Ao= bond distance at particular 1.669 Ao 0.529 * 10-10…

Q: An absorption column is designed to remove a dilute aqueous solution of component A, using clean…

A:

Q: 2. Exponential drop of activity (i) Define activity and state its units. (ii) Explain the following…

A: Dear Subscriber! As per our authoring guidelines, we can author the first of the multiple and…

Q: J is the nucleation rate, solve this; 1.0086 = exp (-J (0.2) )

A: Given, the expression for nucleation rate is 1.0086 = exp-J0.2

Q: 25. What is the entering concentration of nitric acid? a) 0.145 mole/dm3    b) 0.326 mole/dm3   c)…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: 1. A sunphotometer is an instrument that looks at visible light coming in a straight line directly…

A: It is given that,Incident power intensity, transmitted power intensity, Zenith angle, /

Q: The half life of Bi–210 is 5 days. In what period of time would the activity of a given sample of…

A:

Q: Example: Calculate the minimum fluidization velocity for a non-uniform sand media having following…

A: Given, dp= 0.93mm = 9.3*10-4mm, µ= 1.306*10-3, ρ= 999.7 kg/m3, ψ= 0.75 ξi = 0.39, ξf = 0.42 Let the…

Q: What is the mass of 5.13 moles of Na2Cr207?

A: Molarity is calculated as the ratio of the number of moles of solute to the volume of the solution.…

Q: Substance D initially weighs 56 grams. After 6 minutes, It was observed that its mass decreased by…

A: Giveninitial weight of substance , N0=56 gfinal weight of substance, N=56-12=48 gtime elapsed= 6…

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 3.50 billion years old by…

A:

Q: What would happen if Earth's gravitational pull on the Moon suddenly stopped?

A: When the earth's gravitational pull on moon suddenly stopped, the moon travels around the earth at…

Q: Please answer numbers 25 and 26. Thank you! 25. What is the entering concentration of nitric acid?…

A: Given that P = 8.2  atm T = 227 C 15 mol % ammonia in air

Q: The half-life of uranium-238 is 4.5 billion years. What is the decay constant for uranium-238? А)…

A:

Q: 12) A chemical analysis of two unknown compounds found that they are both made up of only calcium…

A:

Q: Cobalt crystallizes in a HCP unit cell. It's atomic radius is 0.1253 nm. It's density is 8,900…

A: Cobalt has an HCP structure Atomic radius of cobalt is

Q: In order to find out if a certain coin is made of gold, you measure its dry mass and it's wet mass…

A: Density is a measure of mass per volume. The average density of an object equals its total mass…

Q: Derive the relationship between root mean square velocity and most probable velocity. The root mean…

A:

Q: U-238 atoms is 0.66. Assume all of the Pb-206 present is due to the decay of U-238. What is -kt the…

A:

Q: Plutonium decays at a rate which is proportional to quantity available with us. In the lab…

A:

Q: Using the particle in a box model, the energy (J) of the highest occupied energy level for a linear…

A: Length of linear polyene = 1.4 A = 1.4 × 10-10 m π election = 8

Units and Dimensions

Dimensions are the basic concepts of the measurement of quantities. Units are the means of expressing the dimensions. For instance, an area has a dimension of L2 and a unit of m2.