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A student generates oxygen gas and collects it over water. If the total volume of the gas collected is 245 mL and the total pressure is 758 mm Hg at 25 C, what is the mass of the oxygen gas generated?
A 4000 gram sample of the unknown compound was found to contain .6406 gram of fluouride and 1.7931 gram of chloride. Determine the mass percent of fluoride and of chloride in the compound. What is the empirical formula of the original compound
We titrate 20.0 cm3 NaOH solutions and in the equivalence point the volume of 0.2 M HCl solution is 15.0 cm3. Calculate the concentration of the NaOH solution.
a mixture of 1.57 mol n2 1.92 mol h2 and 8.13 mol of nh3 is introduced into 20.0l reaction vessel at 500k. at this
Describe epidemiological or preventive public health measures for tuberculosis
Observe the d-orbitals on a central metal and use the character table to derive their irreducible representations (remember which column to look at). Circle any that are nonbonding for sigma interactions.
Calculate the mass of urea that should be dissolved in 187 g of water at 35C to produce a solution with vapor pressure of 37.7 mmHg
an air bubble is expelled by an underwater diver at a depth of 19.0 m. as the bubble rises to the surface the pressure
Problem- Consider the following rate law expression: rate= k[A][B]. Which of the following is true and not true about the reaction having this expression. What is the overall order of the reaction
Calculate the molar mass that would be obtained from the actual experimental data under the following conditions. The unknown is methyl propyl ether (CH3OC3H7)
after the correct formula for a reactant in an equation has been written , what can be changed to balance the equation?
Would the solar panel work under a fluorescent or halogen light? Explain your response being sure to relate your observations to atomic energy and electrons.
The solid compounds NaCl and Cu(NO3)2 are added to a beaker of water. What happens? Select the single best answer. CuO precipitates nothing precipitates
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