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Excessive quantities of wash water are added to the CaC2O4*H2O precipitate. Will the mass of the CaC2O4*H2O be reported too high, too low, or unaffected. Explain
If the step for digesting the precipitate were omitted, will the reported "percent limiting reactant" in the salt mixture be too high, too low, or unaffected
A reagent bottle on the shelf labeled 0.5 M NaCl was used in place of the 0.5 M CaCl2. Assuming C2O42- to be in excess, what would be observed as a result of using this reagent in this test
A couple of drops of water were accidentally placed on the properly folded filter paper before its mass was measured.
The drying oven, although thought to be set at 125°C, had an inside temperature of 84°C. How will this error affect the reported percent by mass of the limiting reactant in the salt mixture.
The CaC2O4*H2O precipitate is not completely air-dried when its mass is determined. Will the reported mass of the limiting reactant in the original salt mixture be reported too high or too low
Draw one planar structure each for the following compounds using dashed or solid wedges to show the stereochemistry of the substituent groups. To be graded properly, include the hydrogen atoms on th
Because of porosity of the filter paper some of the CaC2O4*H2O precipitate passes through the filter paper. Will the reported percent of the limiting reactant in the original salt mixture be reporte
What mass of silver chloride would be formed from mixing 250 mL of 0.240 M MgCl2 solution with 200 mL of 0.380 M AgNO3 solution? AgCl FWT = 143.32 g/mol
3.21 grams of a protein that has a molar mass of 16,000 g/mol are dissolved in 25.0 mL of water at 25 ºC. Calculate the osmotic pressure in mmHg.
If the freezing point constant for water is 1.86 ºC/m and assuming ideal conditions, determine the freezing point of a 0.0100 m aqueous solution of Na2SO4.
The first-order disappearance of a substance has a half-life of 34.0 s. How long does it take for the concentration of the substance to fall to 12.5% of the original value
The acid dissociation constant for HClO2 is Ka = 1.1 x 10-2. You add 1.08 g of HClO2 to 427 ml of 0.0150 M NaClO2 solution. What are the equilibrium concentrations of H3O+, ClO2-, and HClO2
How would the results differ if you added sodium p-toluate instead of p-toluic acid to the two-layer mixture of tert-butyl methyl ether and water
Name the alkene(s) with the molecular formula C6H12 that are unbranched and that show E/Z isomerism.
The amount of energy released by burning a fuel source, measured in energy per mass, is called the fuel value. If energy obtained from burning 1.23 pounds of butane (feul value is 10.85 kcal/g) is u
If you have 300.0 mL of water at 25.00 degrees C and add 130.00 mL of water at 95.00 degrees C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.
If a system has 2.00 x 10^2 kcal of work done to it, and releases 5.00 x 10^2 kJ of heat into its surroundings, what is the change in internal energy of the system
Draw 2 resonance structures for each of the following molecules. Calculate the formal charge for each atom and indicate whether the structures are equivalent. Benzene, C6H6
The retina of a human eye can detect light when radiant energy incident on it is at least 4.0 x 10^-17 j. For light of 600 nm wavelength, how many photons does this correspond to
What is the molarity of a solution made by dissolving 2.355g of sulfuric acid in water and diluting to a final volume of 50.0 mL
What is the balanced molecular equation for the reaction. What is the balanced complete ionic equation for the reaction. What is the net ionic equation. Which ions are spectator ions
Calculate the number of moles of ions present in 356 mL of 0.358 M calcium nitrate.
Commercial concentrated nitric acid is 69.0 % by mass HNO3 and has a density of 1.42 g/mL. Calculate the molarity of concentrated nitric acid.
A first-order reaction has a half-life of 55.0 min at 25 ºC and 6.8 min at 100 ºC. What is the activation energy for this reaction