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How long in hours, must a current of 2.4 amperes flow in order to deposit 9.50 grams of copper, Cu (s) from a solution of Cu(NO3)2? the molar mass of copper is 63.5 g/mol.
If 876 coulombs of electricity is used to reduce Cr3+ to Cr (s), how many grams of chromium will be deposited at the cathode?
How long would it take (in seconds) to deposit 1.97 g of copper from an aqueous solution of copper(II) sulfate by passing a current of 2.44 amperes through the solution?
How many grams of solid ammonium chloride would you have to add to2.5 L of .125 M NH3 to obtain a buffered solution of pH= 8.350? (Kb of NH3 = 1.8 *10-5)
Determine the empirical formula of a 100 g sample of acompound found to contain 63.50 g of silver. 8.25 g of nitrogen,and the remainder of oxygen.
A sample of gas collected over water at 42 degrees celsiusoccupies a volume of one liter. The wet gas has a pressure of0.986atm. The gas is dried, and the dry gas occupies 1.04L with apressure of 1.
Nitroglyerine is an explosive used by the mining industry. It detonates according to the following equation:4C3H5N3O9(l)→ 12CO2(g) + 6N2(g) +10H2O(g) + O2(g) what volume is occupied by the gases
You have analyzed a 25.00 mL sample of fruit juice, which you titration with a 0.009986 M iodine solution. Your initial buret reading is 15.28 mL and your final buret reading is 20.12 mL.
If a 0.20 mole sample of AgNO3 is dissolved in 0.500 Lof 1.0M NaCN, and 0.20 mole of NaCl is added, what will be the solubility quotient and will precipitation occur?
Consider the strong electrolyte, MX, wich dissociates into M+ and X- ions upon dissolution in water. If the mobility of M+ is 1.866 times that of X-, What percentage of the current is c
A. A certain weak acid HA with Ka = 5.61 x10-6 is titrated with NaOHA solution is made by mixing 9.0 mmol of HA and 1.0 mmol of the strong base. What is the resulting pH? I got pH = 4.35 which
What is the minimum concentration of NH3 required to prevent AgBr(s) from precipitating out of a solution containing 0.01M AgNO3 and 0.001MNaBr?
4Al+O2----->2Al2O3 If 12 moles of Al2O3 are produced, how many moles of aluminum reacted. Please explain how you reached your answer.
What mass of iron can be produced from the reduction of 1500gof iron(III) oxide according to the following equation?fe2O3+3CO2 -> 2Fe+3CO2
What mass of sodium benzoate should be added to 140.0 mL of a 0.17 M benzoic acid solution in order to obtain a buffer with a pH of 4.25?
What is the percent purity of a sample of iron ore if 1.25g of sample, when reacted with an excess of HCl, produces 220 mL of H2gas collected over water at a total pressure of 1.00atm and 26 degrees
An organic compound can be extracted from a water layer by anorganic solvent more efficiently if the water layer is saturatedwith an inorganic salt such as sodium chloride.
Consider the following reaction, which occurs in a single step and is reversible: CO(g) + Cl2(g) D COCl(g) + Cl(g). Kinetic studies indicate that the rate constant for the forward react
At the end point of titration of 25 ml of .3 M naoh with .2 M hno3 what would the concentration of sodium nitrate be answer is 6.41 x 10 ^ -15 and 1.56 * 10 ^ -2 but how?
The dissociation constant Kb, for the weal base methylamine,CH3NH2 is 4.4x10-4. What is the pH of a 0.080 molar solution of this base?
You have to prepare a pH 3.60 buffer, and you have the following.10M solutions available: HCOOH, CH3COOH, H3PO4, HCOONa, CH3COONa,and NaH2PO4.
61.20 g of water at 58.0 °C is added to a student calorimeter containing 48.80 g of water at 25.0 °C. What is the final temperature of the water mixture?
Calculate the molar heat of neutralizationin kJ/mol of the reaction between HA and BOH given the following information:
Suppose you are given two different metals: A and B. Both metals have the same mass. After each metal absorbs the same amount of heat, the temperature of metal A increases by 11.6 °Cand that of
You have conducted anexperiment, and the cells used for the standards all had cell width of 1cm, but the cell used for measuring the absorbance of the sample did not. Would the result be too high, t