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How many grams of dry NH4Cl need to be added to 2.30L of a 0.800 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.83? Kb for ammonia is 1.8 * times 10^-5
Why does the pink color of phenolphthalein fade away and is soda pop acidic. Why
The hydrogenation of Oleic acid to a steric acid. we used 10% pd/c, ammonium formate, mentanol, dichloromethane, 95% ethanol, and 1M sulfuric acid to get steric acid.
how many moles of NH4Cl are necessary to prevent the precipitation of magnesium hydroxide (neglect change in volume due to addition of NH4Cl)? The solubility product for Mg(OH)2 is 1.5× 10-11, and the Kb for ammonia is 1.8 × 10-5.
A typical frequency used by GSM cell phones is 759.0 MHz. What is the wavelength of this signal in m?
what is the purpose of anhydrous CaCl2? why is it important yhat none of the solid CaCl2 be included in the final distillation of 1- bromobutne.
A person weighing 85 kg running at 16 km/hr requires 4245 kJ of energy per hour. How far must this person run to consume the energy contained in 0.770 kg of sugar?
what accounts for the large amount of ring strain in cyclopropane and cyclobutane? (Hint: what bond angle does an sp^y hybridized carbon prefer? What angles are necessary for each of the geometric shapes you are building?)
The activation energy for a given reaction is 87 kJ/mol. What is the ratio of the rate constants for this reaction when the temperature is decreased from 37 °C to 15 °C
Determine what volume of N 2 is released at 0.915atm of pressure and at the temperature of 25 degree celcius from a tank full of liquid N 2 ? (d=0.808g/mL)
Which would be safer if exposed to a flame, a gas can full of gasoline or a can with half air and half gasoline. Explain.
A standard Ni(s) |Ni^2+ (aq) || Ag^+ (aq) | Ag(s) is constructed and the standard potential is 1.03 V a) write a balanced reaction for the cell
If the caffeine concentration in a particular brand of soda is 3.35 mg/oz, drinking how many cans of soda would be lethal?
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