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What is the half-life of a compound if 60. percent of a given sample of the compound decomposes in 54 min? Assume first-order kinetics.
Calculate the molarity of chloride ions when HCl is added to Co(NO3)2 ? (this is the cobalt complex and chloride experiment)
a 1.33 m solution of citric acid h3c6h5o7 in water has a density of 1.10 gcm3. calculate the mole fraction of the
Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of a proton moving at a speed of 4.70 +- .01*10^4.
a specific brand of gourmet chocolate candy contains 7.00 g of dietary fat in each 22.7-g piece. how many kilograms of
A buret containing NaOH solution has an initial reading of 0.14ml. 25.00ml of 0.1000M HCl is titrated to a phenolphthalein end point,
what is the Na+ ion concentration in the solution by mixing 20 mL of .10 M Na2SO4 solution with 50 mL of .30 M Na3PO4?
To prepare a solution of NaCl, you weigh out 2.634(±.002)g and dissolve it in a volumetric flask whose volume is 100.00(±0.08)ml. Express the molarity of the solution, along with its uncertainty, with an appropriate number of digit.
How many grams of LiCO3 do you need to weigh out to dissolve in the 5.0 liters? If you had started with a 5000. ppm solution of Li2CO3 solution, how many mL of it would you need to pipet into the 5.0 liter to achieve the same 425 ppb Li 1 solution..
What would be the effect of performing your kinetics experiments at a lower temperature than the one you used?
If you dilute 25.0 of the stock solution to a final volume of 0.460 , what will be the concentration of the diluted solution?
The solutions mixed together are 51.7 mL of 0.110 M hydrochloric acid, 102.4 mL of 0.213 M of nitric acid, 500.8 mL of 0.0101 M calcium hydroxide, and 201.7 mL of 0.114 M rubidium hydroxide. Did the acids and bases exactly neutralize each other?
The standard enthalpies of combustion for ethanol and dimethyl ether are -1367kJ mol-1 and -1460kJ mol-1, respectively, at 298K. what is delta U at 298K for the purposes below:
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