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A pure sample of 226 Ra includes 2.0 x 10^14 atoms of the isotope. When the half-life of 226 Ra = 1.6 x 10^3 years, determine the activity of the sample?
A disk rotates having constant angular acceleration. The initial angular speed of the disk is around 2p rad/s. After the disk rotates via 13p radians, the angular speed is around 9p rad/s. (i) Dete
What is the standard molar internal energy of formation of NH3 (g) when the standard molar enthalpy of formation of NH3 (g) is -46.11 kJ/mol.
Determine how many milligrams of iodine will sublime into an evacuated 1.00-L flash? What will the final pressure be when 2.0 mg of I2 is used?
A proton traveling at 27.8° with respect to the direction of the magnetic field of strength 3.57 mT undergoes a magnetic force of around 9.24 x 10-17 N. Compute (i) the speed of proton and (ii)
Calculate how many grams of product should be produced. Put 1gram of copper in the crucible/Place crucible in ring support /Heat over Bunsen burner
Compute the freezing point of the mixture (in oC) when the homemade ice-cream is frozen by the churning it in a bucket suspended in an ice-water-salt mixture. A typical mix calls for 2.30 kg o
Determine how much work is done in transferring one micro coulomb from an equipotential line of 4 volts to the equipotential line of around 8 volts?
The X-Y phase diagram is shown in the attached figure. The two metals X and Y are soluble in each other at all proportions both in the liquid state and in the solid state.
Why might it be worth for the non-mathematician, non-engineer to have the appreciation and/or working understanding of higher level mathematics, even if computations will not part of daily routine.
Assume that there is no heat exchange with the surroundings. A 75-g ice cube at 0.0 degrees Celsius is dropped into the 200-g of water in a 85-g aluminum cup. The cup and the water have an initial t
Discuss why the 3-pentanol 13C-NMR spectrum contains three peaks while the trans and cis-2-pentene spectra contain five peaks (note that 13C-NMR gives a peak for each unique&n
0.95 % other and 0.52% in soluble. Identify three bases of Portland cement and the compounds they form when mixed with water when mixed with water the resulting cement slurry is basic.
Fringe benefits are $10.18 per employee for life insurance and 12.3% of payroll for a stock purchase plan. Determine total cost of fringe benefits?
Determine the numbers of different principal quantum numbers can be found in the ground state electron configuration of nickel?
A child pushes a merry go-round from rest to the final angular speed of around 0.72 rev/s with constant angular acceleration. In doing so, the child pushes the merry-go-round 2 revolutions. Find out
Explain how much heat is absorbed by a 11.2 g sample of water in going from liquid at the 38.9 oC to steam at 116 o C and a pressure of 1.00 atm? Use the data in the table for proble
A radioactive material primarily is observed to encompass an activity of 1,000 decays/sec. When three hours later it is viewed to encompass an activity of 125 decays/sec, determine its half-life?
Weekly payroll of Abkar Hardware comprises 19 employees who earn $280. How much is employer's share of total social security and Medicare taxes for first quarter of year?
The two beakers are connected with a salt bridge. A voltaic cell consists of a strip of lead metal in a solution of Pb(NO3)2 in one beaker, and in the other beaker a platinum electrode is immerse
The uniform angular acceleration of the wheel is constant. Primarily its angular velocity is zero. Throughout the first 1.0 s time interval, it rotates via an angle of 88.0°.
Illustrate stereo presentations for both (R)-2-Octanol and (S)-2-bromooctane. Explain what this indicates about the mechanism of attack by the nucleophile in this reaction
Company evaluates that sales will increase by $48,000 during coming year due to increased demand. How much must net operating income increase?
Steam enter the nozzle at 1 Mpa 300C having a velocity of 3m/s. The pressure of the steam at the nozzle exit is 0.3Mpa find out the exit velocity of the steam from the nozzle supposing the reversibl
Is energy conservation violated when the refracted ray vanishes for theta 1 > theta c, where does the light go? Discuss why the angle among the incident and reflected rays is twice the angle