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Question- Calculate the pH of a buffer containing 0.15 M benzoic acid and 0.1 M sodium benzoate. You then add 0.025 moles of NaOH to 1 L of this buffer. Recalculate the pH.
Using textbook reference solve the reactions given in above problem
Based on this data, what can you predict about the average atomic mass of vitellium?
Question- Bromobenzene is converted to a compound with the molecular formula C7H7Br in the reaction scheme below. Draw the structures of the product and the two intermediates, and identify the reagents in each of the three steps.
50.0 ml of water are placed in a calorimeter. when 15.0 g of iceare added to the calorimeter the temperature drops from
State a baseball must weigh between 5.00 and 5.25 ounces (1 ounce =28.3g). Explain what is the wavelength of a 5.15 ounce baseball thrown at92mph
a 100.0-l flask contains a mixture of no2 gas and co gas. if the concentration of no2 is 5.5 times 105 ppm and the
At 63.5C the vapor pressure ofH2O is 175 torr, and that of ethanol,C2H5OH, is 400 torr. A solution is madeby mixing equal masses of H2O andC2H5OH. What is the molality of ethanol in the solution
Draw a Lewis structure for SO2 in which all atoms obey the octet rule. Show formal charges. 2 Draw a Lewis structure for SO2 in which all atoms have a formal charge of zero. Explicitly showing the zero charges is optional.
What is the length of a cubic lose-packed unit cell of an element, in picometers, if the atomic radius is 187.0pm
A gas is placed in a storage tank at pressure of 30.0 atm at 20.3 degrees Celsius. As a safety device, there is a small metal plug in the tank made of metal alloy that melts at 125 degrees Celsius.
a gas sample containing 1.35 mol at 25degc exerts a pressure of 405 torr. some gas is added to the same container and
The solution was cooled in an ice-water bath for 10 minutes and pure crystals were obtained. The crystals were filtered on a Hirsch funnel and rinsed with about 0.5 mL of ice-cold ethanol. After drying, the weight of the crystals was found to be 5..
The excess reagent required 4.30mL back-titration with .00812M Cu2+. Calculate the average weight of Cr on each square centimeter of surface.
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