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A student is conductiong this experiment, but forgets to temper the lid. therefore it breaks while the hydrate is being heated. the student thinks carefully and replaces the old lid with a new one, collecting the following data. what is the percent of water in the student's sample?
crucible + old lid 35.32gcrucible + old lid + sample before heating 36.08gnew lid 11.41gcrucible + new lid + sample after heating 35.99gpieces of old lid 11.22g
We place 1.32 mol PCl5 in a 1.0L flask and allow it to reach equilibrium at a given temperature. What is the final concentration of Cl2 in the flask? PCl5 = PCl3 + Cl2 K= .47
the resulting mixture has (pb2+)i=1.0x10^-3M, (so4^-2)i=1.0x10^-4 for pbso4 ksp=1.3x10^-8. compare qsp to ksp and decide whether a precipitate will form.
what is the required time at 675 degrees celsious to have only 25% Austenite left during the transformation from Austenite to Pearlite?
The net energy EN is just the sum of the two expressions above. Determine (a) the minimum bonding energy, E0, and (b) the equilibrium interionic distance, r0.
Find the activity coefficient of H+ in a solution containing 0.010M HCl plus 0.040M KClO4. What is the pH of the solution?
A sample of 54.7 g of HCl gas is dissolved to make 1L of solution. What is the molarity of the solution?
What is the equivalence point volume? What is the cell potential at each of the following volumes of added Ce4+ ?
Determine the percent yield for the reaction between 45.9g of NaBr and excess chlorine gas to produce 12.8g of NaCl and an unknown quantity of bromine gas.
What mass of oxygen gas is required in order to release 6670 kJ of heat to the surroundings by the following reaction
Each reaction needs to be balanced and all physical states (s, l, g, aq) noted (you may need to look these up or read the lab to determine the physical states).
The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 °K to 500 °K. Assuming transiytion state theor is valid
How many grams of the strong acid HClO4 must be combined with water to make 400 ml of a solution with a pH of 1.5.
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