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A current of 3.65 A is passed through a Fe(NO3)2 solution for 1.40 hours. How much iron is plated out of the solution?
One mole of sucrose weighs 342.3 grams. 1mol=6.02*10^23 molecules. Dietary fats (typically 18-20 carbons) contain about 9 dietary calories per gram. Assume all food consumed goes to making ATP
If you mixed 75 ml of 2 M HCl with 37.5 ml of 4 M NaOH, how many joules of heat would be released? How much would the temperature of the solution increase?
Which net ionic equation best represents the reaction (if a reaction occurs) between CaCO3 + HNO3 a. Ca2+ + 2NO3- ? Ca(NO3)2 b. CaCO3 + 2NO3- ? Ca(NO3)2 + CO32- c. CO32- + 2HNO3 ? H2O + CO2 + 2NO3- d. CaCO3 + 2H+ ? Ca2+ + H2O + CO2
the water level in the collecting vessel is the same as the outside level. Atmospheric pressure is 756.0 Torr and the temperature is 25 degrees C. Calculate the atomic mass of the metal.
How much time is required for a 6.85 sample of to decay to 0.500 if it has a half-life of 27.8 days
If a divalent metal ion is inserted in the center of the porphine ring, its charge will exactly balance the two negative charges of the dianion. Write a balanced equation for the reaction of tetraphenylporphyrin (which you can abbreviate as TPP) w..
Kp for the reaction of SO2(g) with O2 to produce SO3(g) is 3 × 1024 . Calculate Kc for this equilibrium at 25ºC. (The relevant reaction is 2SO2(g) + O2(g) 2SO3(g).)
Hydrogen sulfide () is a common and troublesome pollutant in industrial wastewaters. One way to remove is to treat the water with chlorine
Liquid nitrogen has a density of 0.808g/ml at 77 K. A sample of 2.5 L of liquid nitrogen is allowed to evaporate at 21°C and 1.00 atm of pressure. what volume will the nitrogen gas occupy?(keep your phases straight)
The equilibrium contant Kc for the reaction HF(aq)+H20(l)-->H30+(aq)+F-(aq) is 3.5x10^-4. What is the equilibrium concentraction of H30+ if the initial concentration of HF is 1.0M
placed in 1.00*10^3 g of water at 25C. final temp of this mixture was 26.3C. What is specific heat of metal?
Which of the following aqueous solutions produces the largest concentration of toal ions and what is the total concentration of ions. A) 1.5 m sodium sulfate B) 1.5 m magnesium sulfate C) 2.0 m lithium perchlorate D) 1.0 m magnesium phosphate
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