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Suppose that an astronomer discovers a quasar with a redshift of 6.0. With what speed would this quasar seem to be receding from us? Give your answer in km/s and as a fraction of the speed of light.
For an ideal gas the pressure P, the volume V and the temperature T are related by the ideal gas equation of state, PV = nRT, where R is the general gas constant and n is the number of moles. Consider V as a function of T and P and show that dV is..
Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol vaporizes at 25.
In 1.00 atm of pure oxygen, the solubility of O2(g) in water is 1.26 x 10^-3 M at 25.0 degree C. The mole fraction of oxygen in air is 0.210. If the atmospheric pressure is 0.979 atm, what is the solubility of oxygen in air at 25.0 degree C?
A student standardizes his NaOH titrant solution with KHP. He performs three titrations - in each trial, the mass of KHP (204.22 g/mol) used is 1.500 g. The average amount of NaOH used in the standardization is 29.3 mL +/- 0.06 mL.
dinitrogen monoxide gas and 3.41g of carbon dioxide gas. You can assume both gases behave as ideal gases under these conditions. Calculate the mole fraction of each gas. Be sure each of your answer entries has the correct number of significant digits..
A sealed container holds 1.00 mole of helium and 2.00 moles of nitrogen at 30.0°C. When the total pressure of the mixture is 666 mm Hg, what is the partial pressure of the nitrogen? Provide an answer correct to 2 significant figures in mmHg.
what effect does increasing the temperature have on equilibrium? what effect does adding a catalyst have on equilibrium?
Given that the initial rate constant is 0.0190s^-1 at an initial temperature of 28 degrees celsius what would the rate constant be at a temperature of 150 degrees celsius for the same reaction descrabed in part A?
how many mL of 1.00 M hydrochloric acid is needed to prepare a 100.0 mL solution of hydrochloric acid with pH = 5.0 that also contains 0.01667 M MgCl2?
Calculate the number of moles of solute present in eahc other following solutions: a) 60.0g of an aqueous solution that is 1.25 percent KI by mass, b) 250g of an aqueous solution that is 0.460 percent NaCl by mass, c) 0.600L of 1.25M H2SO4.
When N2O5 (g) is heated it dissociates into N2O3 (g) and O2(g) according to the following reaction: N2O5(g) N2O3(g) + O2(g) Kc= 7.75 at a given temperature. The N2O3(g) dissociates to give N2O(g) and O2(g) according the following reaction:
25.0 mL of 1.00 M HCl at 24.3oC react with 25.0 mL 1.00 M NaOH in a styrofoam calorimeter whose calorimeter constant is 70 J/C. The final temperature is 31.8o C. Assume the density of the solution product is 1.00 g/mL and the specific heat of the ..
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