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1) How much NaOH would you need to dissolve in water in order to prepare 1.50 L of a NaOH solution in which [OH-]=0.65 M?
2) The venom of biting ants contains formic acid, HCOOH (Ka=1.80*10^-4 at 25 C). What is the pH of a 0.0065 M solution of formic acid?
The average person generates about 2500 Kcal of heat a day. How many kilowatt-hours of energy is this? If walking briskly dissipates energy at 500 W, what fraction of the day's energy does walking one hour represent.
what is the formula for calcium oxalate dihydrate when 100 degree Celsius heat is added?
A sample consisting of various gases contains 3.4 10-6 mole fraction of radon. This gas at a total pressure of 33 atm is shaken with water at 30°C. Calculate the molar concentration of radon in the water.
Calculate the volume of N2 produced at 21 degrees C and 823 mmHg if 60.0 g of sodium azide reacted
sulfuric acid from an automobile battery requires 35.08 mL of 2.12 M sodium hydroxide solution for complete neutralization. What is the molarity of sulfuric acid ? the reeaction is H2SO4 + 2NaOH to 2H2O+ Na2SO4
How much heat in joules is required to heat a 46 {rm g} sample of aluminum from 80 F to 146 F?
2H2S (g) + 3O2 (g) → 2H2O (g) + 2SO2 (g) If 3.50 g of H2S are used in the above reaction, what will be the theoretical yield of water in grams.
A rigid cylinder with a movable piston contains a 2.0-liter sample of neon gas at STP. What is the volume of this sample when its temperature is increased to 30.°C while its pressure is decreased to 90. kilopascals.
Under these conditions, how long would it take for a sample to decompose to 25% of it original concentration?
48.61g od maagnesium was dissolved in diluted sulfuric acid and 490g of MgSO4. 7H2O was isolated from the solution. How many percent of impurities did the metal contain?
Construct a simulated 1H NMR spectrum for 1,1-dichloroethane by dragging and dropping the appropriate splitting patterns into the boxes on the chemical shift baseline
Calculate the molality of methanol in a solution prepared by dissolving 75.0 mL methanol, CH3OH (density = 0.791 g/mL), in 150 g ethanol.
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