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A student prepared a stock solution by dissolving 20.0 g of NaOH in enough water to make 150. mL of solution. She then took 15.0 mL of the stock solution and diluted it with enough water to make 65.0 mL of a final solution. What is the concentration of NaOH for the final solution?
Balance the subsequent equations. Utilize the lowest possible whole number coefficients. Comprise states-of-matter under the given conditions
Stearic acid, nature's most common fatty acid, dimerizes when dissolved in hexane. The equilibrium constant for this reaction at 28 degrees Celsius is 2,900. Estimate the equilibrium constant at 38 degrees C.
A 100 mL sample of .20 M HF is titrated with .10 M KOH. determine ph after addition of 100 ml of KOA. Ka of HF is 3.5x10^-4
Write and balance the chemical equation for combustion of C13H24O. What is the sum of all of the coefficients in the correctly balanced chemical equation
How far below ground level does the bottom of the pool appear to be located when the pool is filled halfway with water? Answer in units of m.
What is the order with respect to OH ^-1 for this reaction. The answer is 2 and the solution is 2^X = 4 ; X=2. Do I do this with every rate reaction problem.
A balloon filled with helium gas has a volume of 500 mL at pressure of 1 atm. The balloon is released and reaches an altitude of 6.5 km, where the pressure is 0.5 atm.
the final temperature of both the water and metal is 32.81 degrees C. The specific heat of water is 4.184j/g*K. What is the speciic heat of the metal?
Calculate the molarity (M) of Ca2+ in a solution prepared by adding 4000 mL of 0.800 M Ca(NO3)2 and 0.250 L of 0.100 M Ca(NO3)2 . Assume volumes are additive.
Question- Briefly explain whether the following procedural errors would result in either an incorrectly high or incorrectly low calculated percent Cu recovery for this experiment.
The water temperature was 24.0°C after the reaction and the barometric pressure in the lab was 30.12in. of Hg. Calculate the pressure of the O2 gas collected in atm.
how many grams of water can be cooled from 45 c to 23 c by the evaporation of 63 of water? the heat of vaporization of
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