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Which salt would make an acidic solution when dissolved in water? a. rubidium diiodide b. aluminum tribromide c. potassion fluoride d. calcium sulfate Which would produce a basic solution in water? a. Sodium hypochlorite b. Sodium bisulfate c. Beryllium chloride d. Potassium iodide
160 mL that contains 400 mg of NH3 and 980 mg of NH4NO3. (Given: Kb (NH3) = 1.8 x 10-5
Describe how you will prepare a buffer system of 0.50 M nitrous acid and sodium nitrite, pH 3.60.
when companies sell compressed gas in steel cylinders, they usually quote the contents as volume of gas at 1 atm pressure at tempertaure of 20 degrees celcius.
A student's piece of galvanized metal had a mass of 42.73 grams before dipping it into the acid. Afterwards its mass was 42.22 grams. How many moles of zinc were removed? How many atoms is that?
What mass of Al (26.89 amu) is consumed when 800. kJ of heat are released by the following reaction? 2Al(s) + Fe2O3(s) -> 2Fe(s) + Al2O3(s) deltaH = -850. kJ
the temperature of the calorimeter (including its contents) rose from 23.18oC to 27.65oC. What mass, in g, of benzoic acid was burned. here is what i did, 3226/122.13=26.41 delta t =4.474 so 4.474*12.5/26.41 =2.12 is the answer 2.12g
Why is it important to not dilute an initial sample before it hasbeen loaded
The density of a gaseous element at 310oC and 1.02 atm is 2.64 g/L. What is the molecular weight of the element
The reverse reaction is first order in B and the rate constant is 8.50 X 10^-1 What is the value of the equilibrium constant for the reaction A (equilibrium) B at this temperature
Methane and hydrogen sulfide form when 36g H2 reacts wih carbon disulfide, calculate the percent yield if the actual yield of CH4 is 69.8g.
Describe the use of light absorbing reagents in amino acid chromatography. What are these reagents used for? Name two reagents that are commonly used and describe how they react with amino acids.
A student in a hurry decides to let the solvent travel only half way up the chromatographic paper in chromatogram 2. predict the effect of this procedural change on the resultion
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