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How many grams of precipitate are formed if 0.27 grams of barium nitrate is mixed with 0.2 L of 0.8 M potassium carbonate?
Ba(NO3)2 (aq) + K2CO3 (aq) --> BaCO3 (s) + 2KNO3 (aq)
One mole of water vapor is expanded reversibly from 5L to 15L at a temperature of 800K. Calculate q, w, deltaE for this process assuming that water behaves as a van der Waals gas,
The lighter isotope has an abundance of 67.7%. Calculate the atomic mass of the element X.
the thermite reaction is performed using 8.6g Fe2O3 and 1.8g powdered Al metal. which reactant is in excess and by how much?
Synthesis of a Liquid Crystal, experiment in which added 500 mg of cholesterol to 1.5 mL of dry pyridine. Then added 1.7 mmol of benzoyl chloride and heated the mixture.
Sample containing three organic compounds: a hydrocarbon (RH), carboxylic acid (RCOOH), and an amine (RNH2, organic compound with acid-base properties similar tammonia).
Write, using correct notation, the balanced nuclear reaction equation for each of the following:a. Electron capture by 93/43 Tc
If the rate constant at 20 degrees CELSIUS IS 4.3(10^-5). How long would it take for 83% of the compound to decompose ? if the rate constant is 9.0(10^-4) at 55 degrees Celsius what will the activation energy be?
a plutonium-239 atom may emit a photon of light with a wavelength of 24.0 pm when it undergoes nuclear fission. What is the frequency of this radiation?
How many grams of sodium formate, NaCO2H are needed to prepare 100 ml of a formic acid, sodium formate buffer
What is the value of the rate constant for this reaction, what it the half life of the reaction under the conditions of this experiment
Q 3: The salt NaBrO(3) oxides Sn^2+ to SnCl(6)^2- in the presence of hydrochloric acid according to the equation
differentiate acids from compounds that contains hydrogen and an anion, or oxyanions and are not acids
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