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A current of 3.96 A is pass through a Ni(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 8.90 g of nickel?
Gold can be hammered into extremely thin sheets called gold leaf. A 210. mg piece of gold (density = 19.32 g/cm3) is hammered into a sheet measuring 4.2 1.0 ft. What is the average thickness of the sheet in meters? GIVEN: 2.54 cm = 1 inch
What is delta G for this reaction at 298 K when the partial pressures are PC2H6 0.15 atm, PH2 0.15 atm, and PCH4 0.75, What is the delta G in kJ/mol?
If the molar enthalpy of water is 6.009 kJ/mol, how much energy is needed for 4.5 moles of ice to melt at STP?
A 120g sample of an unknown substance was heated from 15oC to 30oC. The substance absorbed 458 joules of energy. What is the specific heat of this substance?
The instruction booklet for your pressure cooker indicates that its highest setting is 12.5 psi . You know that standard atmospheric pressure is 14.7psi
Calculate the pH of 1.00 L of the buffer 1.01M CH3COONa/1.01M Ch3COOH before and after the addition of the following species. (Assume there is no change in volume). (a) pH of starting buffer:
12 grams of hydrogen is combined with 104 grams of oxygen as an explosive reaction that forms water as its sole product. All the hydrogen reacts but 8 grams of oxygen remain. How many grams of water is formed?
Bromine can form compounds or ions with any number of fluorine atoms from one to five. Write the formulas of all five of these species
Determine the moles of H2O lost. E. Write the empirical formula for hydrated alum, based on your experiment.
How many milliliters of 12.6 M HCl solution are needed to obtain 0.105 mol of HCl?
Design a series of reactions to convert ethanol to 2-butanol. You can use other inorganic reagents you need
15 g of steam at 373 K is added to 250 g of H2O (liquid) at 298K at onstant pressure of 1 bar. Is the final state of the system steam or liquid water? Calculate changes in entropy for the process.
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