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A typical microwave oven use microwave radiation with wavelength ?=12 cm. The microwave radiation is absorbed by water molecule, causing it to rotate, and the friction produced by these rotational motions heats the water and the food. A completely dehydrated food will not heat up in the microwave oven. (a) Calculate the microwave energy in Joule per photon and in Joule per mole of photon (J/mol). (b) How many moles of microwave photon must be absorbed by 1.0 g of water to raise its temperature by 1.0 ºC? (c) How many moles of microwave photon must a sample of 250-g water absorb to raise its temperature from 22 ºC to 100 ºC? (Avogadro's number = 6.02x10^23/mol; Planck's constant, h=6.63x10^-34 J.s; speed of light, c = 3.00x10^8 m/s; specific heat of water, Cp = 4.184 J/g. ºC)
What is the difference between the voltage produced by a cell and the current produced by a cell?
An aerosol spray can of deodorant with a volume of 210mL contains 3.4g of propane gas as propellant. Part A What is the pressure in the can at 20 celsius
Camphor is mixed with methanol, then sodium borohydride is added. Then boil, add mixture to ice and stir.
A photon having E = 46.9 keV energy scatters from a free electron inside a metal. What is the maximum energy the electron can gain from the photon
how many grams of potassium permanganate are needed to decolorize 1 gram of 2-pentene in basic solution?
A lactic acid/lactate ion buffer solution contains 0.31 M HC3H5O3 and 0.90 M C3H5O3-, respectively. The Ka value of lactic acid is 1.4x10^-4. Calculate the pH of this buffer.
Consider the following bond lengths: C-O is 143pm, C=O is 123 pm, and C triple bond O is 109 pm. In the [ CO3 ]2- ion, all three C-O bonds have identical bond lengths
How much heat is absorbed in the formation of 1.69 mol of NO? Answer units KJ
Outline a detailed scheme utilizing extractions that he can use to separate the mixture back into the pure components before the professor finds out.
Hexane is used to wash the solid product of a Sn1 carbocation reaction why is ice cold hexane used? and why does it need to be ice cold?
calculate the standard reduction potential of Joaquium. Write reaction in cell notation form.
A 5.5 g sample of metal at 100.0 degrees celsius is placed in a calorimeter with 20.0 g of water at 15.0 degree celsius. If the temperature of the water rises to 21.0 degrees celsius, what is the specific heat of the metal?
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