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To what volume will the gases expand against a constant pressure of 660. torr if all the energy of combustion is converted into work to push back the piston?
A certain first-order reaction (A to products) has a rate constant of 4.20×10-3 at 45 degrees celcius. How many minutes does it take for the concentration of the reactant,[A] , to drop to 6.2
Calculate the smallest increment of energy that an object can absorb from yellow light whose wave length is 214nM.
How much heat energy is required to raise the temperature of 0.365 of copper from 23.0 to 60.0 ? The specific heat of copper is 0.0920 cal/(g*Celsius) .
What is the mass of the solid NH4Cl formed when 64.0 g of NH3 are mixed with an equal mass of HCl? What is the volume of the gas remaining, measured at 14.0° C and 752 mmHg?
If 147 mL of wet H2 is collected over water at 24°C and a barometric pressure of 735 torr, how many grams of Zn have been consumed? (The vapor pressure of water is 22.38 torr at 24°C.)
Consider 2Al + 6HCl yields 2AlCl3 + 3H2, the reaction of Al with HCl to produce hydrogen gas. This reaction has a yield of 82.5 percent. How much HCl are needed to produce 14 L of H2 at 351 K and 1.
Say you removed an ice cube at -10 ºC weighing 36 g from your freezer. Now you place the ice cube in a 90 g sample of liquid water at 20 ºC in an insulated (thermally isolated) container.
1.00 mL of a 3.60 × 10-4 M solution of oleic acid is diluted with 9.00 mL of petroleum ether, forming solution A. Then 2.00 mL of solution A is diluted with 8.00 mL of petroleum ether, forming
The carbonyl carbon of the amide to form another molecule (where the central carbon is attached to a hydroxyl group and two amines)? Is this a plausible mechanism?
What volume of water was added to the 350 mL of NaOH solution? Assume volumes are additive. Answer in units of mL.
39.5 mL of this solution is titrated to the stoichiometric point with 12.3 mL of 0.0611 M HCl(aq). What's the percent purity of the original sample?
Gaseous germane reacts according to the balanced equation. If a total of 5240 kJ of heat is produced in the reaction as written, how many moles of O2 are consumed?
Then 25 mL of the solution are reacted with excess AgNO3 and 0.3800g AgCl precipitate formed. What was the mass percent of D2O in the original sample of enriched water?
What is the formula for solving the following problem? The specific heat of Ti is .523 J/gcelcius. What is the final temperature of 62g of Ti intially at 41celcius after 8.5kj of heat is added?
Suppose you have 0.001 M solution of a dye with pka of7.2. from the color, concentration of protonated form is found to be 0.0002 M. Assume remainder of the dye is in the deprotonated form. What is
A calorimeter contains 34.0 mL of water at 13.5, ^{circ}C. When 1.80 g of rm X (a substance with a molar mass of 70.0 g/mol) is added. Calculate the enthalpy change, Delta H.
Calculate the standard emf of a cell that uses the Mg/Mg^2+ and Cu/Cu^2+ half-cell reactions at 25 degrees celsius. Write the equation for the cell reaction that occurs under standard-state conditio
The vapor pressure of CH3 COCH3 (propanone or acetone), is 67 Torr at 0 ? C and 222 Torr at 25 ?C. What is the standard enthalpy of vaporization of propanone? Answer in units of kJ/mol.
Draw an energy diagram that explains why pyridine is a better nucleophile AND leaving group in the following reaction.
Biological organisms live at great depths in the ocean and they have adapted their bodies to survive at extreme temperatures and pressures in the dark. One of the adaptations is to equilibrate thei
The vapor pressure of chlorine dioxide (ClO2 ) is 155 Torr at -22.75 ?C and 485 Torr at 0 ? C. What is the normal boiling point of chlorine dioxide? The universal gas constant is 8.314 J K/mol
A 0.5078g sample of impure nitrobenzene was treated with 1.044g of tin. when the reaction was complete, the residual tin was found to weight 0.338g. Calculate the percentage of nitrobenzene in the s