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In ploystyrene beaker , we mixed 30 mL of 0.1 M sodium acetate and 15 mL of 0.1 M hydrocloric acid. we measured the PH ( in PH meter ) it was 4.86 and then we added 5 mL of 0.1 M NaOH to this buffer. we measured the PH by (PH meter) it was 5.33 how much the PH of solution befor adding NaOH and after adding NaOH.
A quantity of ice at 0°C is added to 66.4 g of water in a glass at 55°C. After the ice melted, the temperature of the water in the glass was 15°C. How much ice was added? The heat of fusion of water is 6.01 kJ/mol and the specific heat is 4.18 J/(..
The flask was then shaken until the solution was uniform. A 45.0- sample of this glucose solution was diluted to 0.500 . How many grams of glucose are in 100. of the final solution?
A zero-order reaction has a constant rate of 3.20×10-4 . If after 60.0 seconds the concentration has dropped to 6.50×10-2 , what was the initial concentration?
35 mL air sample collected at 31 C has a pressure of 575 torr. What pressure will the air exert if it is allowed to expand to 476 mL at 56 ? C? Answer in units of torr.
What is the isentropic work required for the ideal gas case? C) If the comppressor has an efficiency of 0.78 and is NON-ideal, what is the final temp and required work?
A volume of 12.8 L is occupied by 0.57 mol of helium gas. What is the volume of 0.78 mol of helium gas under the same conditions?
how many grams of solid NaOCl must be added to 50 mL of .14 molar HOCl to obtain a buffer solution with a pH of 7.49.
Write the structural formula of a compound with an unbranched chain of five carbon atoms that is an alkanal, Consider E/Z stereochemistry of alkenes. Do not show stereochemistry in other cases.
what kind of product distribution and what does that tell you about the operating mechanism and the factors that affect product distribution?
What mass of gold is produced when 5.90 A of a current are passed through a gold solution for 16.0 min?
A current of 3.15 A is passed through a Pb(NO3)2 solution for 1.40 hours. How much lead is plated out of the solution.
A buffer is made up 0.24 M propanoic acid, CH3CH2COOH, a weak monoprotic acid, and 0.17 M of sodium propanoate, CH3CH2COONa. What is the pH of the solution.
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