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What is the ratio of the rate of effusion of the most abundant gas, nitrogen, to the lightest gas, hydrogen?
how many calories of heat must be added to raise the temperature of 40 g of water fro 25 Celsius to 50 Celsius
An airplane is pressurized to 650 mmHg, Which is the atmospheric pressure at a ski resort at 1.30 * 10^4ft alt?
Calculate the enthalpy change for the reaction, assuming that the solvation enthalpies of the sugars are negligible. Draw an energy profile for the overall process.
Why is Benzyl Bromide, which appears to be a primary halide, able to undergo SN2 and SN1 reactions. Support your answers with drawings.
Using activities, calculate the pH of a solution containing 0.019 M NaOH plus 0.0120 M LiNO3
a volume of 5.3 L at 127 degrees Celsius, what is the pressure of the gas in atmospheres?
A compound gave an orange precipitate when reacted with 2,4 -DNP and showed a strong absorbance. The Tollens test shows a negative result
A solution is prepared by dissolving 10.5 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 13.00 mL sample of this stock solution is added to 55.00 mL of water. Calculate the concentration of ammonium ions and sulfate ions ..
One of the nuclides in spent nuclear fuel is U-235, an alpha emitter with a half-life of 703 million years. How long would it take for the amount of U-235 to reach 1/8 of its initial amount
How many non-bonding valence electrons are there in a molecule of citric acid? please show how to calculate/count them up.
Calculate the pH of a solution formed by mixing 250.0 mL of 0.15 M NH4Cl with 100.0 mL of 0.20 M NH3.
A photon having E = 46.9 keV energy scatters from a free electron inside a metal. What is the maximum energy the electron can gain from the photon
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