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Uses of de-Broglie equation in electromagnetic specra.
a. What is the utmost wavelength of energy needed to observe a photoelectric effect for potassium?
b. What is the corresponding colour of light of this wavelength?
A 200 g sample of water with a temperature of 32?C is added to 50 g water at 55?Cin an insulated container. What is the final temperature after thermal equilibrium is reached? The specific heat of water in the liquid sta ...
Balance the molecular equation for the following redox reaction. What is the sum of the coefficients? Don't forget coefficients of one. Use the smallest whole number coefficients possible. H 2 SO 4 (aq) + HI(aq)I 2 (s) + ...
Question 1: This is a tandem MS of a tryptic peptide. The mass of the intact peptide is 1569.692 Da. a. There are two immonium ions labelled with their mass-to-charge ratio in the spectrum. Label the signals with their s ...
1.) What is the purpose of making derivatives of unknowns? 2.) Give three reasons why acetone might interfere with your results. 3.) An unknown sample does not react with 2,4-dinitrophenylhydrazine reagent, but a color c ...
Why is the freezing point of water set at 32ºF? Why does the Fahrenheit scale start at 0º?
Explain why acidic rain produced as a result of excess sulphur dioxide in the atmosphere can cause degradation of buidings.
Jenny and Mark complete a reactivity experiment by placing samples of metals into water. They initially place small shards of potassium into water and observe that hydrogen gas and potassium hydroxide solution are produc ...
When .0430 mole of titanium is combusted in a bomb calorimeter, the temperature of the calorimeter increases from 30.00degress Celsius to 91.60 degrees Celsius. In a separate experiment, the heat capacity of the calorime ...
A sample of O2 was collected over water at 25C and .865 atm. If the total sample volume was 2.538 L, how many moles of O2 were collected?
Explain the geochemical differences between acidic mine waters and basic mine waters.
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