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suppose that 2.5 mmol of Ar(g) occupies 72 dm^3 at 298 K and expands to 100 dm^3. Calculate delta G for the process.
Question- What is the PH of a 0.115 mol/L solution of sodium nitrite, NaNO2, at 25C? (pKa=3.14 at 25C for HNO2).
consider a sample that is a mixture composed of biphenyl benzoic acid benzyl alcohol. the sample is spotted on a tlc
Suppose that the microwave radiation has a wavelength of 10.8 . How many photons are required to heat 205 of coffee from 25.0 to 62.0 ? Assume that the coffee has the same density, 0.997 , and specific heat capacity, 4.184 , as water over this tem..
Problem- What is the chemical equation for the above reactants. What are the states of each reactant and product. Are any products insoluble
Problem- A light emitting diode emits photons with an energy of 3.221 x 10^-19 J. What is the energy per mole of photons emitted. Ans. 1.94 x 10^5 J/mol.
If the formation of a Grignard reagent does not begin spontaneously when Mg metal and a solution of an alkyl halide in ether are mixed, one sometimes adds a small amount of iodine to the flask. What substance is formed from the reaction of iodine ..
water is produced from the reaction of 21.1g of hydrochloric acid and 43.6 of sodium hydroxide, calculate the percent yield of water.
Why does the positive potential superimposed with an AC current allow high mass particles to pass through the quadrupole
If you fill the larger tank with oxygen to a pressure of 135 , to what pressure should you fill the acetylene tank to ensure that you run out of each gas at the same time? Assume ideal behavior for all gases.
It takes 16.6 min for a 10.0-mL sample of an unknown gas to effuse through a pinhole. A 10.0-mL sample of helium, He, required 5.00 min. What is the molecular weight of the unknown gas
The vapor pressure of CCl4 (MM = 153.81g/mol) at 65 degree celsius is 504mmHg. How many grams of C10H8 (MM= 128.2gmol) must be added to 25.00g of CC4 so that the vapor pressure of CCl4 is 483mmHg?
Hypervenilation raises the pH of the blood in a condition known as respiratory alkalosis. Common treatment is to have the patient breathe into a paper bag,
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