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1. What is the speed of a sound wave in air at 300°K? What is the speed in helium at the same temperature? Can you explain why a person who has inhaled helium speaks with a high-pitched voice (do not try this yourself)?
2. Find the Mach number of an airplane traveling at 2000 f t/s at altitudes of 5000 f t, 10, 000 f t, 20, 000 f t, and 30, 000 f t. Assume a standard atmosphere (Table Appendix-C.6).
Calculate the pH in the titration of 25.0 mL of 0.100 acetic acid by sodium hydroxide after the addition
The greater acidity of terminal alkynes as compared with alkanes is primarily attributed to a) the greater electronegativity of sp hybridized carbons compared to sp3 hybridized carbons
Explain the three kinds of enzymatic inhibitors. Sketch a Line weaver-Burk plot for each, Explain how the kinetics of the reaction is changed.
Write a balanced chemical equation for the reaction of C with SO2 to form CS2 and CO. How many moles of SO2 and CO are there? a. 2 moles of SO2 and 4 moles of CO
At 46°C a sample of ammonia gas exerts a pressure of 5.3 atm. What is the pressure when the volume of the gas is reduced to one-half (0.5) of the original value at the same temperature
Water vapor will react reversibly with methane (CH4) to produce carbon monoxide and hydrogen gas. The equilibrium, with a Kc = 0.26, is established at 9270C in a 0.32L flask which contains 0.26mol CO, 0.091mol H2, and 0.041mol CH4. What is the con..
Select all of the correct statements about reaction quotients and equilibrium constants from the choices below. A reaction quotient equals the equilibrium constant at equilibrium.
What is the percent yield of a reaction in which 260. g phosphorus trichloride reacts with excess water to form aqueous phosphorus acid (H3PO3) and 127 g HCl?
Write an equation to show how HSO3. Can act as a base with H2O acting as an acid. Express your answer as a chemical equation.
If this mixture is cooled at a constant pressure, at what temperature does the CCl4 first start to condense
The pressure exerted on a 240 mL sample of hydrogen gas at instant temperaure is increased from .428 ATM to.724 ATM. What will the final volume be for the sample be?
Based on the sign of E°cell, classify these reactions as spontaneous or nonspontaneous as written. Assume standard conditions. Zn^2+ (aq) + Sn(s) --> Zn(s) + Sn^2+(aq) Al^3+ (aq) + 3Na(s) --> Al(s) + 3Na^+ (aq) Ni^2+ (aq) + S^2- (aq) --> Ni(s) + S..
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