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(a)What is the relationship between the wavelength and the frequency of radiant energy?
(b) Ozone in the upper atmosphere absorbs energy in the 210-230-nm range of the spectrum. In what region of the electromagnetic spectrum does this radiation occur?
calculate the change in freezing point of water if 0.0053g of a protein with molecular weight 10083gmol is dissolved in
Problem- Who has the shorter wavelength when running at the same speed- a person weighing 60 kg or a person weighing 80 kg. Explain your reasoning
Calculate the pH of a buffer solution made by mixing 40.4 g of potassium formate into 1 L of a 0.09 M solution of formic acid. Give the pH to two decimal places.
A helium-filled balloon has a volume of 2.63 L at 28 ? C. The volume of the balloon decreases to 2.36 L after it is placed outside on a cold day.
assume that you are a chemical engineer attempting to optimize the process cog 2h2g right arrow ch3ohg what
a sample of mgcl2 is known to be contaminated with nacl. a 3.47-g portion of the sample is dissolved in water and
Complete the subsequent reaction showing how glucose can be identified as a reducing sugar. Depict the organic product at physiological pH. State the formula of the copper-containing product.
Calculate the mass percent of a solution that is prepared by adding 32.2 g of NaOH to 262 g of H2O.
What is the partial pressure of H2O in the compressed gas mixture? (See this table.) torr (b) What mass of water vapor condenses to liquid g
Nitrogen reacts with hydrogen according to the following equation.
How many milliliters of 0.200 M FeCl3 are needed to react with an excess of Na2S to produce 1.38 g of Fe2S3 if the percent yield for the reaction is 65.0%? 3 Na2S(aq) + 2 FeCl3(aq) ? Fe2S3(s) + 6 NaCl(aq)
For a particular reaction it was found that the reaction rate was 16 times faster at 35oC than it was at 25oC. It was also found that the equilibrium constant at 25oC was four times bigger than it was at 35oC.
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