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A 0.0623g sample of cobalt sulfate was dissolved in dilute HCl and treated with 10% BaCl2 solution. The BaSO4 precipitate weighed 0.1075g. Determine the formula of this sulfate of cobalt.
The half-life of Plutonium-239 is 24,000 years. If 10 gms are present now, how long will it take until only 10% of the original sample remains? Round your answer to the nearest 10,000th.
What are some of the general properties that distinguish metals from ceramics and polymers?
A patient needs to take 625 mg of ibuprofen twice daily. The pills in the bottle are each 250. mg. How many pills does the patient need to take each time she wants the 625 mg dosage? Assume that these pills are scored and can be cut in half if ne..
calculate the IHD and select all the types of unsaturation that might be present in the molecule based on the IHD.
How many grams of cobalt metal will be deposited when a solution of cobalt(II) chloride is electrolyzed with a current of 10. amperes for 109 mintues?
A buffer is made by dissolving HC2H3O2 and NaC2H3O2 in water. Write an equation that shows how this buffer neutralizes added: Acid, Base
a rigid ball contain 25.0 liters of air at 22 degree Celsius and 6.25atm pressure was placed in an oven at a temp of 100degree what was the new pressure inside the ball.
The specific heat of toluene, C7H8, is 1.13 J/g K. How many joules of heat are needed to raise the temperature of 50.0 g of toluene from 12.0°C to 30°C?
0.60 g of hydrogen chloride HCl is dissolved in water to make 7.5 L of solution. What is the pH of the resulting hydrochloric acid solution.
A compound having a specific rotation of [?] = +40.3° has been isolated and purified. This information indicates that the natural compound: a. is racemic. b. does not rotate plane-polarized light. c. is levorotatory. d. is dextrorotatory
Calculate the pH during the titration of 10.00 mL of 0.400 M hypochlorous acid with 0.500 M NaOH. First what is the initial pH (before any NaOH is added)? The Ka for HOCl is 3.0 x 10-8 M.
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.
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