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when liquid water is put into an evacuated vessel at 25 celsius what is the sign of the change in enthalpy, entropy, free energy, and temperature for the system during this process?
If 2 x 10-4 moles of S2O8 ^2- in 50 mL of solution is consumed in 188 seconds, what is the rate of consumption of S2O8^2-?
A volume of 20.22 mL of NaOH solution which is (0.046464) was needed to titrate 10.06mL of acetic acid to the phenolphthalein end point.
The amount of energy needed to heat 2.00 g of carbon from 50.0 C to 80.0 C is 42.6 J. what is the specific heat capacity of this sample of carbon.
What is the ratio of the conjugate base concentration to the acid concentration, that is, [B-]/[HB] when the indicator switches to the acidic color?
If the 53 g aluminum block is initially at 25^circ C, what is the final temperature of the block after the evaporation of the 1.02 galcohol? Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and t..
Calculate the final temperature of the solution has a specific heat capacity =4.18 J/°C · g. assuming no heat lost
A 0.0100 L sample of H2SO4 (Sulfuric Acid) was titrated with 0.150 M NaOH. It took 23.3 mL of NaOH from the buret -- that's 0.0233 L -- to reach the titration endpoint.
A hot tub is filled with 470 gallons of water, which has a density of 1.0. How many kilocalories are needed to heat the water from 67 to 109?
Radioactive radon gas (222Rn) enters an average building at a rate of 5 picocuries per second per square meter of foundation area. Consider a house with a foundation of 400 square meters and a volume of 1000 cubic meters.
calculate the molality of a solution prepared by dissolving 19.9 grams of KCl in 750.0 mL of water
The normal boiling and freezing points of substance X are 87.3 K and 84.0 K respectively. The triple point is at 82.7 K and 0.68 atmosphere. a. Draw a phase diagram for substance X. Label the regions in which the s,l, and g phases are stable.
Calculate the freezing point and boiling point of a solution of 383 g of glucose dissolved in 400 g of water
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