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225mL of a gas are collected over water at 22 C and 790torr. Explain the mass of the gas is 0.425 g as well as the vapor pressure of water at 22 C is 20torr. Explain what is the molar mass of the gas?
The enthalpy of a solution of KBr in water is about +198 kJ/mol. Nevertheless, the solubility of KBr in water is relatively high. Why does the solution process occur even though it is endothermic
How many minutes would a solution of Cd2+ have to be electrolyzed with a 2.420 A current to plate out 1.77 g of Cd? min
a solution of 1 ppm Pb2+was prepared and dispensed 1 mL of it using a volumetric transfer pipette, also the same solution was dispensed using a measuring (Mohr) pipette.
Lead has melting point of 327 C, its specific heat is 0.13 J/ g*deg, and its molar enthalpy of fusion is 4.80 kj/mol. How much heat, kilojoules, will be required to heat a 500.0g sample of lead from 23.0 C to its melting point then melt it
the molar mass of air is 29.9g/mole and density of air at these temp. is 1.22 g/L. how much methane do u have to heat the sir from 15 centigarde to 22 centigrade
how to draw the Lewis Structure for this. The complete questions says: "Lithium aluminum hydride, LiAlH4, contains both ionic
What statement below best describes the graph representing the integrated 1st order rate law. plot of ln[a] vs t having a straight line negative slope equal to -k
consider the equilibrium?n2g o2g 2nogat a certain temperature the equilibrium constant for the reaction is 0.0255.
determine what is the observed rate for the given reaction 2 o3g -rarr 3 o2g has an empirically determined rate law
how many meters away is a cliff if an echo is heard one half second away? assume that sound ws traveled at 343 m/s on that day.
a very dilute solution contains 116 mg of fructose m180.16 gmol in 1.00 liters of solution. it is placed in a
A 9.1 g sample of C6H5NH3Cl is dissolved in water to make 346 mL of solution. Determine the percentage deprotonation of the cation.
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