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A buffer is to be prepared by adding solid sodium acetate to 0.10 M CH3COOH. Which of the following concentrations of sodium will produce the most effective buffer?
a sample of gas occupies 1.40 X 10 cubed mL at 25 degrees celcius and 760 mmHg. what volume will it occupy at the same temperature and 380 mmHg? which gas law is being used.
a gasous mixture of oxygen and nitrogen contains 32.8% nitrogen by mass. what is the partial pressure of oxygen in the mixture if the total pressure is 405mmHG?
How much PV work is done, and what is the value of ?E for the reaction of .50 mol of H2 with .25 mol of O2 at atmpospheric pressure if the volume change is -5.6L
What is molarity of NaOH solution if 26.0ml of 0.380 M H2So4 solution is required to neutralize a 25.0ml sample of the NaOH solution
To creates a genetically modified transgenic goat that produce a protein that acts as a drug in its milk. The concentration of drug in the milk is 10 mM
In a second 50.00mL aliquot, the ClO4- was reduced to Cl- with V2(SO4)3. Titration of the reduced sample required 40.12mL of the AgNO3 solution. Calculate the %KCl and %KClO4 in the sample
A 10.9-g mixture of nitrogen and carbon dioxide is found to occupy a volume of 8.88 L when measured at 641.9 mmHg and 28.5oC. What is the mole fraction of nitrogen in this mixture?
A hydrate of calcium chloride contains 49.3% water and has a formula weight of 219 g/mol. Calculate the molecular formula of the hydrate.
The molar heat capacity of silver is 25.35 J/mol * C. How much energy would it take to raise the temperature of 8.60 g of silver by 11.1 C?
In the chlorination of cyclohexane there are two types of termination steps: recombination and disproportionation. 1) give two products of recombination:
How many moles of NaF must be dissolved in 1.00 liter of a saturated solution of PbF2 at 25 °C to reduce the Pb2+ to 1 x 10-6 molar?
Strawberries contain about 15 wt% solids and 85 wt% water.To make strawberry jam, crushed strawberries and sugar are mixed in a 45:55 mass ratio, and the mixture is heated to evaporate water until the residue contains one-third water by mass.
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