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A compound has 40.68% carbon, 5.12% hydrogen, and 54.20% oxygen (by mass). Calculate its empirical formula. For credit, please show your work, that is, show all units, steps, set-ups, operations, work in a logical roadmap, etc.
After mixing 500mg of XI3 with sufficient Cl2, 236mg of XCl3 are obtained. This represents 100% yield of that reaction. Determine the identity of element X.
A light bulb is rated at 60 W when used with a 120 V power line. If multiple 60 W light bulbs are to be connected together in parallel, what is the maximum
What is the pH of a buffer solution if 100.0 mL of the solution is 0.15 M with respect to acetic acid and contains 1.56 g of sodium acetate, CH3COONa.
a solution containing a mixture of ethanoic acid ethanol ethyl ethanoate and water was allowed to come to equilibrium
A 100.0-g sample of copper is heated from 10.0 degrees Celsius to 100.0 degrees Celsius.Determine the number of calories needed. (The specific heat of copper is 0.0921 cal/g degrees Celsius.)
A balloon of gas has a pressure of 770 torr, temperature of 21oC and volume of 250 mL. If the temperature changes to 55oC and the pressure to 2.4 atm, what is the new volume in L?
Question- Obtain the expression for the separation distance corresponding to the minimum in the potential energy well described by Lennard -Jones potentials
The absorption of light of frequency 1.16x1011 Hz is required for CO molecules to go from the lowest rotational energy level to the next highest rotational energy level. Determine the energy for this transition in kJ/mol. h = 6.626 × 10-34 J·
What is the molar mass of sodium chloride. In an ionic reaction between sulfate and calcium, the ratio of calcium to sulfate ions is what
The reaction between N2 and H2 to produce NH3 is an important industrial process. Using the information from your text and handouts (you may assume ideal gasses) calculate the equilibrium constant for this reaction at 400 ºC
Determine the grams of magnesium chloride that are needed to produce 1.33 x 10e23 formula units of magnesium phosphate.
Calcium and Magnesium carbonates occur together in the mineral dolomite. Suppose you heat a sample of the mineral to obtain the oxides,CaO and MgO, and then treat the oxide sample with HCl. If 7.695g of the oxide sample requires
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