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1. A metal object is to be gold-plated by an electrolytic procedure using aqueous AuCl3 electrolyte. Calculate the number of moles of gold deposited in 3.0 min by a constant current of 10.
2. How many minutes would be required to electroplate 25g of chromium by passing a constant current of 4.80 amperes through a solution containing CrCl3?
3. The measured voltage of a cell in which the following reaction occurs is 0.96 V: H2(g, 1.0 atm) + 2Ag+(aq, 1.0 M) ? 2H+(aq, pH = ?) + 2Ag(s). Calculate the pH of the H+(aq) solution.
how many moles are there of the reducing agent. What is the molarity of the reducing agent? Oxidizing agent --> KMnO4 Reducing Agent --> Fe +2 Volume of Fe +2 = 25 mL Concentration of KMnO4 = 0.1290 M
In photography, solutions of sodium thiosulfate are used to dissolve unexposed AgBr (Ksp = 5.0 × 10-13) in the developing process for black-and-white film. What mass of AgBr can dissolve in 1.00 L of 0.238 M Na2S2O3.
Give a balanced equation and show how much hydrogen would be needed to reduce the triacylglycerol completely
The oxygen atom with its 2s orbital forms a s bond with one of the three sp2 hybrid orbitals of the carbon atom; the two hydrogen atoms with their 1s orbitals each form a s bond with one of the three sp2 hybrid orbitals of the carbon atom.
How many grams of propane must be burned to heat 180g of water from -15 degrees Celcius
A sample of air at 15 psi is compressed at constant temperature from 555ml to 275ml. Calculate the resulting pressure.
Explain The Chemistry of Food Composition, find the nutritional values/info in food from USDA Nutrient Data Laboratory?
Suppose that you are climbing a high mountain and the oxygen partial pressure in the air is reduced to 75 torr. Estimate the percentage of the oxygen carrying capacity that will be utilized,
a particular sample of rainwater is 0.2 ppb. Assume the density of rainwater is close to 1.00 g/mL and find the molar concentration of C20H42.
An aqueous solution that contains 285ppm of potassium nitrate (KNO3) is being used to feed plants in a garden. What volume of this solution is needed to prepare 1.7 L of a solution that is 97 ppm in KNO3?
compressed gas cylinder contains 1.00 x 103 g of argon gas. The pressure inside the cylinder is 2050 psi at a temperature of 18oC. How much gas remains in the cylinder if the pressure is decreased to 650psi at a temperature of 26oC?
What is the final concentration of copper in the flask b)what is the uncertainty in the value of the copper concentration?
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