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A test solution contained 2 mL of 0.10 M Ag+. A silver strip was dipped into the test solution, and a cell potential of 0.0592 V was measured against an Ag/Ag+(1.0M) reference half-cell. Then 2 mL of 0.50 M S2O32- was added to the test solution. No precipitate formed. The cell potential of the test solution was measured against the reference half-cell, and was found to have increased to 0.532 V. What is the [Ag+] in the test solution after the S2O32- was added?
A calorimeter that contains 2500 g of surrounding water is used to measure the heat associated with the reaction of 520 g of a reactant. Calculate the energy, in joules per kilogram of reactant, associated with the reaction
A voltaic cell is constructed that uses the following reaction and operates at 298 K. (Ered Ni+2 is -0.277) Zn(s) + Ni2+(aq) Zn2+(aq) + Ni(s) (a) What is the emf of this cell under standard conditions?
determine How many grams of AlCl 3 are formed if 30.0 grams of Hydrogen are produced? It is given that the molar mass of AlCl 3 =133.33 g/mol.
What is the density of a substance if a 2.50mL sample has a mass of 0.880g at room temperature? ( show calculations) What is the specific gravity of the substance?
The enthalpy of fusion of methanol is 3.16 kJ/mol. How much heat would be absorbed or released upon freezing 25.6 grams of methanol
Calculate the ratio of the hydronium ion in acid rain to that in normal rain.
Analysis of the products revealed two methylated sugars: 2,3,6-tri-O-methyl-D-glucose, 2,4-di-O-methyl-D-glucose and 2,3,4,6-tetra-O-methyl-D-glucose. The ratio of these sugars was 20:1:1. determine the structure of the polysaccharide?
You dissolve 1.00 gram of an unknown diprotic (two titratable protons) acid in 200.0 mL of H2O. This solution is just neutralized by 5.00 mL of a 1.00 M NaOH solution. What is the molar mass of the unknown acid?
A sealed-end water manometer attached to an air duct reads 1598 cm. An open-end water manometer attached to the same duct reads 556.2 cm.
An electron in the n=5 level of a hydrogen atom emits a photon wavelength 1282.17 nm. To what energy level does the electron move?
"Crossed" or "mixed" aldol condensations are practical for synthesis, if one of the aldehydes (or ketones) has no alpha-hydrogen atoms. Explain.
What mass of potassium bromide residue remains if 500.0 mL of 0.200 M potassium bromide solution are evaporated to dryness?
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