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What is the frequency of radiation that has a wavelength of 12 um , about the size of a bacterium?
What is the wavelength of radiation that has a frequency of 5.70×1014 s-1?
a furniture store needs 31.5 ft 2 of fabricnbsp to upholster one chair. its dutch suppliernbsp sends the fabric in
What is the pressure of a 3.00 L gas vessel that has 18.0 grams of helium at 25 degrees Celsius
Calculate the energy in joules required to ionize a hydrogen atom when its electron is initially in the n = 4 energy level.
What is the molecular weight of a gas if a 21.0 g sample has a pressure of 836 mm Hg at 25.0 C in a 2.00 L flask?
Calculate the pH for 5 x 10-10 M HClO4. Please show work. The answer should come out to pH7 when auto-ionization of water is factored
Pesticide concentrations in the Rhine River between Germany and Grancn between 1969 and 1975 averaged 0.55 mg/L of C6Cl6, 0.06 mg/L of C12H8Cl60 and 1.02 mg/L of C6H6Cl6.
A student takes a mixture of sugar (C6H12O6), diamond powder (C) and BaCO3, separates the mixtures and recovers 1.75g sugar, 0.86g diamond powder and 2.29g BaCO3(s). Student % recovery was 96.46%, less than the initial amount of mixture they start..
Write net Bronsted equations that show the acidic or basic nature of the following substances, given the pH. For polyprotic acids, only show one proton transfer. Remember that spectator ions are not included.
Concentrated HNO3 has a density of 1.40 g/mL and is 65% by mass HNO3 (the rest of the mass is water). How many mL of this concentrated solution do you need to add to a 250 mL volumetric flask to create a 0.050 M HNO3 solution
question 90ml of an unknown concentrated chlorine was diluted with 2250l of water. the dilution now is 0.08mgl. what is
What is the relationship between the structures of esters and their odors. What is the relationship between the structures of esters and the carbonyl peaks from IR spectra
calculate the change in pH that occurs when 1.00 mmol of a strong acid is added to 100 mL of 0.0500 M HCl.
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