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A sample consists of, at most, 100 mg of impure salicylic acid. A student adds 1 mL of hot water and a boiling stick and heats the resulting mixture on the sand bath. Not all of the solid dissolves so the student continues to add hot water dropwise. After another 0.5 mL of water has been added, for a total of 1.5 mL, there is still some white solid remaining. Provide an explanation and advise the student as to how to proceed.
750 Ml of a gas sample at 25 degrees Celsius is increased from 2.00 ATM to 3.51 ATM explain what will the final temperature be?
What is the enthalpy of this reaction. Assume that no heat is lost to the surroundings or to the coffee cup itself and that the specific heat of the solution is the same as that of pure water.
1calculate the total pressure in atm of a mixture of 0.0270 mol of helium he and 0.0200 mol of oxygen o2 in a 4-l flask
Two evacuated bulbs of equal volume are connected by a tube of negligible volume. One bulb is placed in a 200K isothermal bath and the other in a 300K bath, and then 1.00 mole of an ideal gas is injected into the system. Find the final number of m..
hydrogen gas is generated when calcium reacts with water. the volume of gas collected over water at 30 degree celcius and pressure of 988 mm Hg is 641 ml. what is the mass in grams of the hydrogen gas obtained? the pressure of water vapor at 30 de..
Draw the three most reasonable resonance structures of HN3. For each resonance form, give the formal charges of the nitrogen atoms and estimate the Na-Nb-Nc and Nb-Nc-H bond angles.
Draw all substitution products for the reaction of 1-iodo-2-methylcyclohexane with methanol (the products should all be ethers).
A solution consists of 10g of liquid X (MW:50) and 9g of liquid Y (MW:30). The vapor pressures of pure X and Y are 40 and 70 mmHg, respectively, at 20°C. What are Nx and Ny (N = mole fraction)? What is the partial pressure of X over the solution a..
Solid melting infinitesimally slowly at its melting point. liquid freezing below its freezing point. liquid vaporizing above its boiling point
a 260-rm ml flask contains pure helium at a pressure of 759 rm torr. a second flask with a volume of 470 rm ml contains
Write the expression for the reaction rate in terms of d[NOCl]. c. The concentration of NOCl drops from 0.580 M to 0.238 M in 8.00 min. Calculate the average rate of reaction over this time interval.
Explain a sample of helium has a volume of 480 ml at 47.0 Celsius and 740 mmHg. If the temperature is lowered to 22oCelsius. And the pressure to 625 mmHg. What is the new volume
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