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If the wavelength of microwaves in the oven is 9.75 cm, how long does it take, and determine the numbers of photons must be absorbed, to make the water boil? A certain microwave oven delivers 671 wa
Determine the numbers of collisions per second does an N2 molecule make at an altitude of 20 km? When we are studying the photochemical processes that occur in the upper atmosphere, we require
45.5 mL of 0.0505 M NaOH is needed to titrate the HCl remaining in this 25.00-mL portion. What was the original mass of CaCO3 in the piece of chalk?
A person is riding a bicycle, and its wheels encompass an angular velocity of +16.0 rad/s. Then, the brakes are exerted and the bike is brought to a uniform stop. Throughout braking, the angular dis
The person is going to pay off the loan of $20,000 over five years in equal monthly payments. Interest rate is 9% per year compounded monthly. How much interest will person have paid during 1st year?
A compressed liquid mixture of 42 mol percent n-hexane (1) and58 mol percent ethane (2) is to be fed to a flash tank where the pressure is reduced and a liquid and vapor stream separated.
Determine the speed of sound in air, and find out the period and the wavelength of the wave, considering a frequency of around 436Hz.
A cord is wound about a uniform disk which is free to rotate about its center. The radius of the disk is 15cm. Its mass is around 3.5kg and a 5kg mass is joined to the cord and the system is free f
At what pressure should the tank be operated? Discuss what will be the composition of the vapor stream? Assume that the vapor is an ideal gas.
The force on a particle is directed all along the x axis and given by F = 0.88(x/4.0 - 0.69) where x is in meters and F is in Newton. Determine the work done by the force in moving the particle fro
The person plans to put $500 per quarter into the retirement account paying interest at nominal annal rate of 4% compounded quarterly.
Explain will the [Fe+3] equilibrium concentration be determined to be too high or too low. Will the measured Kc be to high or too low.
Determine how much energy is required to take away (i) a neutron or (ii) a proton from the nucleus 16/8 O? Note that this is a question regarding the binding energy of the last neutron or proton.
What experiment could you do, what data would you collect, and how would you analyze the data to ensure that 447nm is the "best" for measuring the absorbance of FeNCS2+ in this experiment?
The shaft of a pump begins from rest and consists of an angular acceleration of 5.20 rad/s2 for 20.0 s. (i) At the end of the interval, determine the shaft's angular speed?
Determine the work done if a gas is compressed from 8.8 L to 3.3 L at constant temperature by a constant pressure of 2.7 atm, and give the answer in units of joules. (1 L· atm = 101.3 J)
Given that the mass of 1 mole of deuterium is 2.01410 g, and the mass of one mole of helium is4.00260 g, determine the number of moles of deuterium required to heat the swimming pool from 12.00 degr
The ball is selected at random. Find probability that it is even or less than 10. 5 balls are selected at random without replacement. Find probability that sum of the numbers on balls will be even.
A silver wire having resistance of 60 ohms is melted down and the similar volume of silver is employed to make a wire which is 3 times broader than the original wire. Determine the resistance of the
Determine the weight of benzene co distilled with each gram of water and the percentage composition of the vapor formed during the steam distillation.
What will be the ultimate result when equivalent masses of ice at 0 degrees C and steam at 100 degrees C are mixed altogether?
The following solutions were then prepared by dilution. A stock solution containing Mn+2 ions were prepared by dissolving1.584 g pure manganese metal in nitric acid and diluting to a final volume of
Calculate the molecular shape for the following compounds. Indicate the bond angles around the central atom. Are these molecules polar or non-polar?
Determine the average energy per free electron as a fraction of the Fermi energy (let, consider three dimensional case).
From one point angle of elevation of top of rock is 16.7°. From the point 168 m closer to rock, angle of elevation is 24.1°. Determine the height of inception rock?