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(a) Calculate the energy of a photon of electromagnetic radiation whose frequency is 6.75 X 1012s-1.
(b) Calculate the energy of a photon of radiation whose wavelength is 322 nm.
(c) What wavelength of radiation has photons of energy 2.87 X 10-18J?
15.0 mL of 0.50 M HCl is added to a 100.-mL sample of 0.496 M HNO2 (Ka for HNO2 = 4.0 × 10-4). What is the equilibrium concentration of NO2- ions?
If the solid calcium carbonate is in powder form. 2) The temperature of a reaction was increased from 20 to 40deg.C. You were determining the rate of reaction at each of the 2 temperatures. The second reaction should be faster by how much
A 45- piece of ice at 0 is added to a sample of water at 20. All of the ice melts and the temperature of the water decreases to 0. How many grams of water were in the sample
Consider the following data and select the best buffer system below to make a buffer with a pH of 10.00.
the specific heat of ethylene glycol is 2.42 jg-k. how many j of heat are needed to raise the temperature of 62.0 g of
Determine the mass of aluminum acetate that can be made if you do the reaction with 125 grams of acetic acid and 275 grams of aluminum hydroxide.
15mL of radiator liquid (water + ethylene glycol) from a car has a mass of 15.69g. Is the the density of ethylene glycol greater or less than that of water
Calculate the molarity of a solution made by adding 26.1 mL of concentrated hydrochloric acid (37.3 % by mass, density 1.19 g/mL) to some water in a volumetric flask,
How much heat is evolved when 3ll.5g of ammonia (NH3) gas condenses to a liquid at its boiling point? ^Hvap= 23.3 kj/mol.
Nickel metal in 0.1M nickel nitrate solution Copper metal in 0.1M copper nitrate solution The solutions are joined by a simple salt bridge. The nickel corrodes and the copper plates on during operation of the cell. Answer the following question: W..
A sample of ethanol (C2H5OH) has a mass of 43.8 g.(a) How many carbon atoms does the sample contain?
Write a balancing equation for the reaction of potassium crbonate plus lead(11) nitrate where the products are lead (11) carbonate and patassium nitrate
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