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Describe the glassware and the technique you would use to take part of a sample of a solution of concentration 1.00 and make it into a solution of concentration 0.250(i.e,make a solution exactly one quarter of the original concentration)
Calculate the initial effusion rate. If this rate continued how much time would pass until the pressure dropped to 0.90 bar? (actually the rate changes with pressure- indicated why using the equations). assume values for nitrogen
Calculate the pH at the 6 points of titration (fraction titrated = 0, 0.25, 0.50, 0.75, 1.0, 1.25). Hint: Since these concentrations are not the same, first calculate the volume of NaOH required to reach the equivalent point.
At 745K, the reaction 2AB(g) ? A2(g) + B2(g) has a Kc = 2.00 x 10-2. If a mixture of 1.00 mol AB and 1.00 mol A2 is sealed into a 10.0 L flask and heated to 745K, what will be the equilibrium concentration of B2
calculate the work in kj when 3.00 moles of hydrogen gas are produced from the reaction of sodium in excess water at
what minimum requirement is needed to obtain reproducible results with a single beam spectrophotometer
a 250.0ml sample of air at 100.0k is warmed to 200.0k at constant pressure. what is the volume of the air sample at the new temperature?
A standard solution was made when 1.276g of pure copper wire (MM= 63.546g/mol) was weighed, dissolved in concentrated HNO3, and diluted to 1.00x102mL. What is the concentration of the stock solution
10.9g of ice at 0.00 degrees C is mixed with 50.0g of water at 32.0 degrees C. What is the final temperature of the mixture? (heat of fusion=333J/g; specific heats: ice=2.09J/gK; water=4.184J/gK
You are given 100 mL of a colorless aqueous solution. How would you determine if the solution is a buffer solution. State what you would need (if anything) in addition to the suspected buffer solution, state what you would do, and how you would de..
one hundred grams of water is saturated with nh4cl at 50degc. according to table g if the temperature is lowered to
A 14.31 g sample of hydrated magnesium sulfate (MgSO3• x H2O) is heated to remove the water of crystallization and 6.99 g of anhydrous magnesium sulfate (MgSO4) remains.
a 51.0 g sample of ethylene glycol hoch2ch2oh is dissolved in 540.0 g of water. the vapor pressure of water at 32degc
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