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A 15.00 ml solution of potassium nitrate (KNO3) was diluted to 125.0 ml and 25.00 ml of this solution were diluted to 1000 ml. The concentration of the final solution is 0.00383 M. Calculate the concentration of the original solution.
Make the compounds listed from an alkyl halide having four carbons or less, with no functional groups but it can be branched, or cyclohexane, cyclopentane, or ehylene oxide.
A technician plates a bowl with about 4.6 grams of chromium from an aqueous chromium (III) sulfate. What current is needed to plate this amount of chromium in 3.5 hours.
Consider a steel tank whose volume is 65.0 L and which contains O2 gas at a pressure of 18100 kPa at 22°C. What mass of O2 does the tank contain?
400cm3 of glycerol, C3H8O3 (density= 1.26 g cm-3) is added to a kilogram of water. What is the mole fraction of C3H8O3 in the solution?
Explain an unknown amount of water is mixed with 370mL of a 6M solution of NaOH solution. A 75mL sample of the resulting solution is titrated to neutrality with 50.7mL of 6M HCl. Compute the concentration of the diluted NaOH solution.
The decomposition of N2O5 yields NO2 + NO3 proceeds as far as a first order reaction with a half life of 30 seconds at a certain temperature. If the initial concentration {N2O5}0=.4 M define what is the concentration after 120 seconds
a 54.7-g sample of aluminum at 95.0 oc is dropped into 35.0 g of water at 40.0 oc. what is the final temperature of the
For a protein w/ a molar mass of 1x10 6 u, calculate the molar concentration required to obtain an osmotic pressure of 10 matm at 25 degrees C
Problem- If you wanted to make 1.00 grams of KCl how many grams of K and how many grams of Cl would you need
Another wood sample prepared from an object recovered at an archaeological excavation gives a decay rate of 0.177 disintegration per second per gram of the sample. What is the age of the object
Problem- Small quantities of oxygen can be prepared in the laboratory by heating potassium chlorate, KCIO3(s)
a gas has a volume of 4.00 l at 0 degrees celius. what final temperature in degrees celcius is needed to change the
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