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A thin lead apron is used in dental offices to protect patients from harmful X rays, If the sheet measures 75.0 cm by 55.0 cm by 10.cm, and the density of lead is 11.3 g/cm^3, what is the mass of the apron in grams?
what is the number of grams of C02 produced if you combust 0.50 ole of Ch4 according to the following balanced equation.
A gas originally at 27 degrees celsius and 1.00 atm pressure in a 3.9 L flask is cooled at constant pressure until the temperature is 11 degrees celsius. determine the new volume of the gas and express your answer in Litre.
a student mixed 5.00 ml of a nickel2 chloride solution with 5.00 ml of .100m sodium phosphate and a precipitate formed.
Give the quantitative species inventory for the result of the mixture of the following substances, 2.00 mols Cl2, 1.00 mols Br2, 0.50 mols I2, 0.50 mols NaCl, 1.00 mols NaBr, and 2.00 mols NaI.
What type of orgainc compound is responsible for the fruity flavorings found in many natural substances
the recrystallization is slow typically the flask is closed with a cork. What do you think is the reason for using a cork and not a plastic stopper (which would seal the flask better)
Determine the acid dissociation contant for a 0.10M acetic acid solution that has a pH of 2.87. Acetic acid is weak monoprotic acid.
Why did the discrepancy between experiments and classical theory for blackbody radiation occur at high and not low frequencies
You are testing some novel fuel mixtures for potential use in automobiles. Your testing apparatus is a 2.54-cm inner diameter cylinder fitted with a piston, designed to mimic a cylinder found in a car engine.
The pH of a 0.25 M aqueous solution of hydrofluoric acid, HF, at 25.0 °C is 2.03. What is the value of Ka for HF
What is the equation for the reaction of cyclohexene wtih MnO4- to form 1,2-cyclohexanediol and MnO2 in a basic medium.
CsCl crystallizes in a unit cell that contains the Cs+ ion at the center of a cube that has a Cl- at each corner. Each unit cell contains __________ Cs+ ions and __________ Cl-, ions, respectively.
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