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A 255-mL flask contains pure helium at a pressure of 760 torr. A second flask with a volume of 455 ml contains pure argon at a pressure of 722 torr.
Use the molar volume of a gas at STP to calculate the density (in g/L ) of carbon monoxide gas at STP.
Elements are always arranged in order of increasing atomic weights. Metallic properties increase going from bottom to top in a family of elements.
A 12.0 g sample of solic NH4Cl is heated in a 5.00 L container to a high temperature. At equilibrium, the pressure of NH3 (g) is 1.22 atm. What is the value of Kp for the reaction
Define the Octet and Duet rule and how it explains the charges on common ions and both covalent and ionic bonding (for representative elements only)
If 3.25 L of ammonia react with an excess of oxygen to form nitrogen monoxide and water steam, what volume of water steam will be produced? The pressure and temperature stay constant. A. 2.04 L B. 2
Using Le Chateleir's principle, explain the effect on teh cell potential of decreasing the Fe2+ ion concentration from 1.0M to 0.1M for each of the following reactions. The concentration of the othe
The reactions represented below are all spoontaneous as written. For each, write the anode and cathode half - reactions and indicate the signs of the electrodes.
A 1.733 g sample of a metal reacts with hydrochloric acid to form a MCl2 type of salt and 380.0 mL of H2 at 20 degrees C and 720 torr pressure. a) Write a balanced net ionic equation for this reacti
At 25 degrees Celsius the rate constant for the decomposition of a pesticide solution is 6.40e-3 min-1. If the starting concentration of pesticide is 0.0314M, what concentration will remain after 62
The solubility product constant of calcium sulfate,CaSO2 is 7.10*10^-5 . How many grams of calcium sulfate can dissolve in 53.5 of pure water
How much faster do ammonia (NH3) molecules effuse than carbon monoxide (CO) molecules? RATE OF NH3 effusion/rate of CO efusion
A gaseous mixture of O2 and N2 contains 39.8% nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 645 mmHg
Three gases (8.00G of methane CH4, , 18.0G of ethane C2H6, , and an unknown amount of propane, C3H8) were added to the same 10.0-L container. At 23.0 C, the total pressure in the container is 3.90AT
A closed container is filled with oxygen. The pressure in the container is 425 . What is the pressure in millimeters of mercury
What is the overall mass-transfer coefficient for oxygen (O2) from the atmosphere to the river? (b)Which part of the transfer mechanism controls the overall rate
Proposed a detail mechanism for the zinc mediated debromination of trans-1,2-dibromocyclohexane. The reagent used was zinc and water and heat where also added to the reaction. The products fromed in
What is the Brownian diffusivity of a 0.2 um (micrometer) particle in air? Assume T = 293 K and P = 1 atm.
The flow of the Florida Current (part of Gulf Stream) through the straights between Key West and Cuba is 150 x 106 m3/sec. The mass concentration of salt in seawater is about 35,000 ppm. What is the
If the freezing point depression of water is -1.86 degrees C/M, what would be the freezing point of this solution
If the freezing point depression of water is -1.86 degrees/m, what would be the freezing point of this solution
Compounds in a and b were named incorrectly. On a sheet of paper draw the molecule that fits the given description. From the structure you drew determine the correct IUPAC name. Write the correct IU
If 0.884 gm of Ag was deposited on the spoon at a constant current of 18.5 mA, how many minutes did the electrolysis take
how many of the alcohol and ethers stereoisomers of formula C5H12O have charity centers.