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What volumes of 0.1000M Acetic Acid and 0.1000M Sodium Hydroxide should be mixed to prepare 1.000L of a buffer solution of pH 4.5 at 250C
A current of 5.64 A is pass through a Ni(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 8.80 g of nickel
When 33.5 mL of 0.585 M H2SO4 is added to 33.5 mL of 1.17 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate pH of this reaction.
The value of deltaH for the reaction CH3OH (l)---->CO (g) +2H2 (g) is +128.1 kJ? How many kJ of heat are consumed when 5.10 g of CO (g) is formed as shown in the equation
A student placed 11.5 of glucose () in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. mark on the neck of the flask was reached. The flask was then shaken until the ..
A 3.575g sample of a monoprotic acid was dissolved in water. it took 22.67ml of a .1453 M NaOH solution to neutralize the acid. what is the molar mass of the acid
The volumes(45.01,45.05,45.07, and 45.33)ml were used to titrate a 50ml aliquot of a sample. would you reject any values at a 90% confidence interval. how about a 95% confidence interval
In this exercise it was also assumed that the calorimeter was a perfect insulator and that no heat was lost to the surroundings.
How would I build a molecule of C(CH3)3Br ? I am using a software called Webmo and MOPAC. Whenever I build a molecule, it would always end up like this C4H9Br?
A Mercury barometer reads 743.5 mmHg. If the density of mercury is 13.523 g/cm^3 at 80.0 degrees C, what would be the height of a water column be if the density of water is 0.972g/cm^3 at 80.0 degrees C
A student dissolves 7.39 g of and unknown protein in 0.286 l of water at 300k. She measures the osmotic pressure to be 3.932 x 10^-3 ATM.
a 251 ml sample of oxygen is collected over water at 25 deg c and 760 torr pressure. if the vapor pressure of water as
A buffer is made using 45.0 mL of 0.750 M HC3H5O2 and 55.0 mL of 0.700 M NaC3H5O2.What volume of 0.10 M NaOH must be added to change the pH of the original buffer solution by 2.5%? Ka for this acid is 1.3 x 10
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