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(A) A gas mixture designed to be breathed by deep sea divers is 5.0% O2, 10.0% N2 and 85.0% He by volume. The air is breathed underwater at 100 feet where the total pressure is 4.1 atm. What is the partial pressure (atm) of oxygen under these conditions?
(B) Calculate the relative rate of diffusion of CO2 compared to SO2.
A solution of 120 mL of 0.150 M KOH is mixed with a solution of 260 mL of 0.200 M NiSO4. How many grams of the precipitate can be formed?
Suppose that 25 g of each of the following substances is initially at 28.0degrees C. What is the final temperature of each of the following substances upon absorbing 2.35 kJ of heat.
identify the absorptions associated witht he carbonyl group and with the aromatic rings
liquid water and sealed at 25C and a pressure of 1.00 bar. What is the pressure if the temperature of the system is raised to 60.0C?
A flask is charged with 0.140 mol of A and allowed to react to form B according to the following hypothetical gas-phase reaction. A(g) B(g) The following data are collected. times (s) 0 40 80 120 160 moles of A 0.140 0.068 0.049 0.031 0.019 (a)
For a particular sample of copper, two peaks were obtained in the mass spectrum,showing an abundance of 69.10% at m/e 63 and 30.90% at m/e 65. Calculate the relative atomic mass of this sample of copper to three significant figures, using the data g..
water to form dissolved boric acid, H3BO3, and hydrogen sulfide gas. What is the balanced Equation?
What is the total volume of gases produced at 819K and 1atm pressure when 256 g of ammonium nitrate (NH4NO2) undergoes the following decomposition?
Why is it important to recrystallize the chalcone before proceeding with the hydrogenation reactions?
Write a balanced equation for the reaction of copper with concentrated nitric acid to form copper(II) nitrate. assume that nitric acid is reduced to No2. water is also formed.
produces carbon dioxide and water. After 5.6 of ethanol (density = 0.789 ) was allowed to burn in the presence of 12.5 of oxygen gas, 3.10 of water (density = 1.00 ) was collected. Determine the theoretical yield of H2O and the percent yield for th..
In a 0.1 molar solution of NaCl in water, which one of the following will be closest to 0.1?" A) the mole fraction of NaCl B) The mass fraction of NaCl
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