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1) How does bright light differ from dim light of the same color in terms of photons?
2) How does blue light differ from red light of the same intensity in terms of photons?
The pH of a white vinegar solution is 2.29. This vinegar is aqueous solution of acetic acid with a density of 1.09 g/mL. What is the mass percentage of acetic acid in the solution?
You may assume that delta H and delta S are independent of temperature.
What mass of solid sodium hypochlorite (molar mass = 74.44 g/mol) should be added to 1.0 L of 0.255M hypochlorous acid to make a buffer with a pH of 7.54? (Ka of HClO = 3.8 x 10-8)
An automobile gasoline tank holds 47kg of gasoline. When the gasoline burns, 165kg of oxygen are consumed and carbon dioxide and water are produced.What is the total combined mass of carbon dioxide and water that is produced?
What is the wavelength of the electrons emitted by the titanium surface, in nm?
What was the Ka value calculated by the student if the pH of the solution was 2.60? Express your answer numerically using two significant figures
A flask contains 0.350 grams of liquid Br( bromine). calculate the number of (Br)bromine molecules present in the flask
Sucrose and glucose are nonvolatile. What is the mole fraction of water in this solution?
calculate the temperature (in EC) at which the vapor pressure is 760 torr. The vapor pressure of Ethanol is 115 torr at 34.9EC
What is the pH of a buffer solution containing 0.155 mol dm-3 of benzoic acid and 0.315 mol dm-3 sodium benzoate.
a solution of 100 ml of .200 M KOH is mixed with a solution of 200 ml of .150 M NiSO4. what is the chemical equation, what precipitate forms, what is the limiting reagent, and how many grams of the precipitate form?
If 0.500 g of antacid was added to 50.00 mL of 0.100 M HCL and 5.65 mL of 0.100 M NaOH was required to titrate the un-neutralized HCL, calculate the actual neutralizing capacity of the antacid in mmol H+ per gram.
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