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At 63.5C the vapor pressure ofH2O is 175 torr, and that of ethanol,C2H5OH, is 400 torr. A solution is madeby mixing equal masses of H2O andC2H5OH.
What is the molality of ethanol in the solution?
For the cyclohexanes substituted in the positions indicated, identify the substituents as either axial or equatorial in chair conformers. For example, a 1,2-cis relationship means that one substituent must be axial and one equatorial.
A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 400.0 Torr at 45.0 °C. Calculate the value of ?H°vap for this liquid.
Using information in Appendices B and C, calculate the minimum number of grams of C3H8(g) that must be combusted to provide the energy necessary to convert 3.25 kg of H2O from its solid form at -11.0°C to its liquid form at 70.0°C.
Lithium hydrogen carbonate decomposes by heat; the reaction is represented by the balanced equation: 2LiHCO3 (s) --------> Li2CO3(s) + CO2(g) + H20 (g)
explain how the designed sensing strategy functions. Point form answers are acceptable, feel free to use a diagram in your explanation.
At the equivalence point of the titration of formic acid by NaOH, the pH of the solution is around 8 - 10. What would be a good indicator
If you have 100ml of a .1M tris buffer at PH 8.3 and you add 3.0 ml HCl what will be the new pH? (PKa of Tris = 8.3)
Find the volume of oxygen gas required to react completely with iron and Calculate the volume of oxygen gas at STP that is required to completely react with 61.0 g of iron.
The volume of a sample of gas, initially at 25oC, increase from 158 ml to 450 ml. What is the final temperature (C) if the pressure in the container is kept constant.
At 0.0oC, if the volume of air is 3.4 mL and the pressure of the atmosphere that day is 695 mmHg, what is the number of moles of air?
What units do chemistry normally use for density of liquids and solids? for gas density? Explain the differences
In tables of thermodynamic data provided in chemistry books, one finds ?H°f, ?G°f, and S° listed. Briefly, explain why the entropy data are supplied as S°, while the enthalpy and free energy data are in the form of ?H°f and ?G°f, respectively.
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