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From the subsequent list of chemicals, select two combinations that would lead to a double replacement reaction. State the complete balanced equations for the reactions of the chemicals in solution.
KCl HNO3 AgNO3 PbCl2 Na2SO4
Using the following data, a researcher heated a 250.0 gram sample of pure uranium metal in excess oxygen. The resulting oxide was determined to weigh 294.9 grams. Determine the empirical formula that the researcher obtained for the oxide using the..
How many grams of dry NH4Cl need to be added to 2.10 L of a 0.700 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.89? Kb for ammonia is 1.8*10^-5. mass of NH4Cl
Explain what is the molar mass of this acid. If this unknown acid had the formula H2X could this experiment be utilized to determine its molar mass. Explain why or why not.
Crystalline silicon has a cubic structure. The unit cell edge length is 543 pm. The density of the solid is 2.33 g/cm3. Calculate the number of Si atoms in one unit cell.
A 1.95 g sample of ascorbic acid is titrated with a 0.89 M red dye. What volume of red dye is required to reach the endpoint. molar mass of red dye= 267.08g/mol; molar mass of ascorbic acid=176.12g/mol
The freezing point of a 0.975 mass percent aqueous NaCl solution is measured to be -0.506 degrees Celcius. What is the van't Hoff factor for this solution
In what approximate lcoation on a IR Spectrum would you expect to see one or two absorptions that distinguish 1-propanol
A flexible container at an initial volume of 6.13 L contains 8.51 mol of gas. More gas is then added to the container until it reaches a final volume of 18.5 L. Assuming the pressure and temperature of the gas remain constant, calculate the number..
The reactions occur in acidic solution. (Use the lowest possible coefficients. Omit states-of-matter in your answer.) (a) MnO4- + H2SO3 ? Mn2+ + SO42-
A sample of Br2(g) takes 34.0 min to effuse through a membrane. How long would it take the same number of moles of Ar(g) to effuse through the same membrane
Write the equalities and conversion factor to complete the following problems. Use scientific notation and the correct number of significant figures. 6.3 x 10-6 uL=______________L (ten power to the negetive six)
A solution is found to be 4.33% Ethanol by mass CH3CH2OH. How many grams of ethanol are in 1 liter of this solution. What is the molarity of this solution
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