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A large flask with a volume of 936 mL is evacuated and found to have a mass of 134.66 g. It is then filled to a pressure of 0.967 atm at 31 °C with a gas of unknown molar mass and then reweighed to give a new mass of 136.41 g. What is the molar mass of this gas?
An herbicide is found to contain only C, H, N, and Cl. The complete combustion of a 100.0-mg sample of the herbicide in excess oxygen produces 83.16 mL of CO2 and 73.30 mL of H2O vapor at STP. A separate analysis shows that the sample also contain..
express the work of isothermal reversible expansion of a van der waals gas in reduced variables and find a definition
Car manufacturers are developing engines that use H2 as fuel. In locations where hydroelectric plants produce inexpensive electric power, the H2 can be made industrially by the electrolysis of water.
Problem- in the photochemical decomposition of a certain cmpd, light intensity of 5.4 x 10^-6 einsteins s^-1 was employed. Assuming the most favorable conditions, estimate the time needed to decompose 1 mole of the compound.
a 5.0g sample of a hydrate of CaCl2 was heated, and only 4.3 g of the anhydrous salt remained. what is the percentage of the water was in the hydrate?
Calculate the final molarity of bromide anion in the solution. You can assume the volume of the solution doesn't change when the sodium bromide is dissolved in
If 21.00 mL of 0.0950 N NaOH solution is used to titrate 28.75 mL of H2SO3 to the first equivilance point, what is the molarity
At 100 ?C the vapor pressures of hexane and octane are 1836 and 354 torr, respectively. A certain liquid mixture of these two compounds has a vapor pressure of 666 torr at 100 ?C. Find the mole fractions in the liquid mixture and in the vapor phas..
For the reaction 2CH4(g) +3Cl2(g) -> 2CHCl3(l) + 3H2(g), the standard enthaly of change of reaction = -118.6KJ. The standard enthalpy of change of reaction
the partial pressure of co2 inside a bottle of soft drink is 4.0 atm at 25degc. the solubility of co2 is 0.12 moll.
3H2 (g) + N2 (g) 2NH3(g), Kc = 6.0 × 10-2 at 500°C for this nitrogen fixation reaction. What is the equilibrium concentration of N2 If 0.250 M H2 and 0.050 M NH3 are present at equilibrium?
A white precipitate is observed to form. (a) Write the full ionic equation for the chemical reaction including spectator ions: (b) Write the net ionic equation. (c) Write the name of the white solid
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