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Say, for example, that you had prepared a Buffer, in which you mixed 8.203 g of sodium acetate, NaC2H3O2, with 100 ml of 1.O M acetic acid. What would be the initial pH of Buffer C.
Consider the neutralization reaction that takes place when phosphoric acid reacts with aqueous potassium hydroxide
A chemistry student needs 60.00 mL of chloroform for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of chloroform is 1.48 g x cm^-3.
Suppose 5.0 mol of antimony (III)fluoride is added to 10.0 mol of carbon tetrachloride. How many grams CCl2F2 and SbCl3 are there if the reaction is 100% complete?
How many moles of oxygen are combined with 4.20 moles of chlorine atoms in C2O7?
Hydrogen sulfide decomposes according to the following equation, for which Kc = 0.00011 at a given temperature. 2 H2S(g) 2 H2(g) + S2(g)
It is desired to inflate a baggie with a volume of 959 milliliters by filling it with hydrogen gas at a pressure of 0.544 atm and a temperature of 284 K. How many grams of H2 gas are needed?
A gas occupying a volume of 263 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?
Assume that a particular reaction evolves 245kJ of heat and that 24kJ of work is gained by the system what is the delta H inside and the surroundings
How much heat is evolved when 243 g of ammonia gas condenses to a liquid at its boiling point?
What is the pH of the solution resulting from the addition of 25.0 mL of .01M NaOH solution to 40.0 mL of .01M acetic acid
An element has three naturally occurring isotopes with the following masses and abundances (in parenthesis): 27.977 amu (0.9222); 28.974 amu (0.0469); 29.974 amu (0.0310). Calculate the atomic weight of the element.
What is the most appropriate temperature for storing your protein between purification steps? a) Room temperature b) 4° C c) -20° C d) -80° C
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