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How does the energy of two photons corresponding to a wavelength of 451 nm (blue light) compare with the energy of three photons corresponding to a wavelength of 704 nm (red light)?
How many neutrons and protons are contained in the nucleus of this isotope?
What will the partition function of this system reduce to at very low temp ( when kbt > delta e)?
A thermally powered refrigerator receives heat from a flame at 400 C and withraws heat from a cold box at -40 C. If the machine is reversible and all heat is discharged at 30 C, calculate the ratio of the heat required at at 400 C to that withdraw..
question you are given a sample of metal and asked to determine its specific heat. you weigh the sample and fid that
A 4.5 g nugget of gold absorbed 276 j of heat. What was the final temperature of the gold if the initial temperature was 25 OC ? The specific heat of gold is 0.129 j/g OC.
where e is the magnitude of the charge on an electron and ε0 is the vacuum permittivity (a fundamental constant). What is the operator for this potential energy?
where a is constant and -infinity
As a chemist for an agricultural products company, you have just developed a new herbicide,"Herbigon," that you think has the potential to kill weeds effectively. A sparingly soluble salt, Herbigon is dissolved in 1 acetic acid for technical reaso..
a student performs two melting-point determinations on a crystalline product. in one determination, the capillary tube contains a sample about 1-2 mm in height and the melting range is found to be 141 degree - 142 degree celsius
lead(II) sulfide was once used in glazing earthenware. It will react with hydrogen peroxide to form lead (ii) sulfate and water. How many grams of hydrogen peroxide are needed to react completely with 265g of lead(ii) sulfide?
HNO3 was required for complete reaction with 0.8784+or- 0.0008g of Na2CO3 (FM 105.988+or- 0.001). Find the molarity of the HNO3 and its absolute uncertainty
Calculating the concentration of the acetate ion when dissociation of acetic acid occurs in water and over varying pH conditions?
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