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A flask at 21.0°C contains exactly equal moles of xenon and argon.
a. Which of the two gases exerts the greater partial pressure?
b. The atoms of which gas have greater average kinetic energy?
c. If a small hole were opened in the flask, which gas would effuse faster?
d. The atoms of which gas have greater average velocity?
Determine the electron affinity of hydrogen; that is, Delta H for the process H(g) + e- = H-(g). To do so, the bond energy of H2(g)
A rubber balloon was inflated with helium gas and floated in the air. The next day, the balloon was somewhat smaller and no longer floated.
a gas sample containing 1.56 mol at 25degc exerts a pressure of 390. torr. some gas is added to the same container and
Introduced into a 1.70 L flask is 0.120 mol of PCl5 ; the flask is held at a temperature of 227 C until equilibrium is established. PCl5(g) PCl3(g) + Cl2(g) What is the total pressure of the gases in the flask at this point
Write the Molecular, Ionic and Net ionic equations for the following reactions. Indicate the spectator ion.
An 8.00 g sample of SO3 was placed an evacuated container where it is decomposed at 600 degrees C according to the following reaction.
Under constant pressure conditions, a sample of hydrogen gas initially at 88.0 degree C and 9.50 L is cooled until its final volume is 3.00L. what is its final temperature
A solution of 0.0385 M hypochlorous acid, HOCl, has a pH of 4.47. Calculate the acid dissociation constant Ka.
Suppose scheme one involves the reaction of the Grignard reagent containing more carbon atoms with the carbonyl compound containing less carbon atoms and scheme two involves the reaction of the Grignard reagent containing less carbon atoms with th..
An atom of 125Sn has a mass of 124.907785 amu. Calculate the mass defect (deficit) in amu/atom. Use the masses: mass of 1H atom = 1.007825 amu mass of a neutron = 1.008665 amu 1 amu = 931.5 MeV
Calculate the pH of a solution prepared by mixing 0.0800 mol of chloroacetic acid plus 0.0400 mol of sodium chloroacetate in 1.04 L of water. (pKa of chloroacetic acid = 2.865.)
a calculator to calculate the average and standard deviation for x1 through x12. i know how to find the average but i dont understand how to findthe standard deviation.
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