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Nickel is a transition element and has a variable valence.Using a nickel salt, 2 F (faradays) plate out 39.2 g ofnickel. What ions are in the solution of this salt? Atomic molar masss Ni = 58.7 g&mi
Write the structure for each functional group. Give an example of a molecule with a functional group and name appropriately.
Choose the correct equation for the standard enthalpy of formation of CO(g), where change Hf for CO= -110.5kJ/mol? (gr indicates graphite)
What is the heat capacity of mercury if it requires 167 J to change the temperatures of 15.0g mercury from 25.0 Celsius to 33.0 Celsius
The MnO4(-) is often used to analyze for the Fe(2+) content of an aqueous solution via the reaction MnO4(-)+Fe(2+)---> Fe(3+)+Mn(2+) in acidic solution. What is the ration Fe(2+):MnO4(-) in the b
[NO2] = 0.65 M, [NO] = 7.2 × 10-8 M, and [N2O] = 0.048 M. What is the value of Kp for this reaction? Enter your answer in scientific notation.
The solubility of barium sulfate varies with the composition of the solvent in which it was dissolved. In which solvent mixture would BaSO4 have the lowest solubility
Calculate delta G at 298 K for the formation of 1 mole of 03 from 02 in urban smog, where [O2]=0.210 atm and[O3]=5.00x10^-7 atm
For the titration of 50.00 mL of 0.0200 M 2-(N-Morpholino)ethanesulfonic acid with 0.09900 M NaOH, calculate how much titrant (mL) is required to reach a pH of 9.29 mL in the receving flask.
A box contains 126000 red marbles and 885000 yellow marbles. What sample size is required to reduce the sampling standard deviation of red marbles to 1.85%
A box contains 12600 red marbles and 885000 yellow marbles. What sample size is required to reduce the sampling standard deviation of red marbles to 1.85%?
The data below were taken to calibrate the instrument. An unknown protein sample gave an absorbance of 0.867. Calculate the mass (micrograms) of protein in the unknown.
Draw the skeleton structure of the repeating unit of the polyester made from this molecule via a condensation reaction
Dissolving NH4Cl(s) in water is endothermic with a heat of the solution of 15.2 kJ/mol. If a 6.134 g sample of NH4Cl is added to 65.0 mL of water in a calorimeter at 24.5°C, what is the minimum
Calculate how much energy in the form of heat is available from 100mL of this mixture and compare it with the amount available from pure gasoline
What will be the pH if 0.00820 mol of HA (pKa=2.34) and 0.00820 mol of A- are dissolved in water to make 1.000 L of solution? this is a dilute acid problem
Sulfamic acid (FM 97.094) is a primary standard that can be used to standardize NaOH. What is the molarity of a sodium hydroxide solution if 38.92 mL react with 0.3341 g of sulfamic acid
Use the Nernst equation to calculate the expected potential in the battery in parts 2(d) and 2(e) when the following concentrations are present: [Cr2O72?] = 3.7 x 10?3 M ; [Cr3+] = 0.0112 M
Lead(II) phosphate, Pb3(PO4)2 (s), is allowed to come to equilibrium with its ions in otherwise pure water. Ksp = 3.0 x 10?44. Calculate the equilibrium concentration of each ion.
Write a balanced equation with phase changes for an electrochemical cell that has a copper cathode immersed in a solution of cu+2 ions and a lead anode immersed in a solution of Pb+2 ions
A solution of NH3 was prepared by diluting 8.29 mL of 27.62 wt% NH3 [density=0.89 g/mL] up to 564.0 mL. The molecular mass of NH3 is 17.0305 g/mol. Find the concentration of NH3 in M.
What are the correct oxidation states for the following compounds? P in H3PO4, Mn in Mn(O4)2- anion, and O in O2F2
The rest mass of a proton is 1.0072764669 u and that of a neutron is 1.0086649156 u. The 75As nucleus weighs 74.92160 u. Calculate the total binding energy of the nucleus.
What is the partial pressure of hydrogen in the collection flask? (Note that the hydrogen is collected over water so there will be gaseous water in the flask along with the hydrogen. At 23°C, th
For the titration of 87.95 mL of 0.1311 M NaOH with 1.2586 M HBr, find the pH of the solution within the receiving flask when 7.87 mL of HBr is added.