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a) Use the Henderson%u2013Hasselbalch equation to calculate the pH of a buffer solution that is 0.45 M in NH4Cl and 0.15 M in NH3
(b) How would you prepare an NH4Cl and NH3 buffer that has a pH of 9.00?
If a bottle of nail polish remover contains 153 g of acetone, how much heat would be released by its complete combustion?
Iron reacts with chlorine gas as follows: 2 Fe (s) + 3 Cl2 (g) > 2 FeCl3 (s)
If the sample contains a combined total of 1.90 mol and has a total mass of 60.3g, what are the percentages of CO2 and Ne in the sample by mole?
How much heat must be absorbed by the six pack to lower its temperature from 25.0C to 5.0C?
Marble (calcium carbonate) reacts with hydrochloric acid solution to form calcium chloride solution, water, and carbon dioxide.
The Reaction 2NOCl(g)---->2NO+CL2(g) has rate-constant values for the reaction of NOCl of 9.3x10^-6/s at 350K and 6.9x10^-4/s at 400K. Calculate activation energy for the reaction. What is the rate constant at 435K?
Calculate the expected pH from a test solution made only with 2.0 mL of 2.5 M sodium acetate
An individual's blood alcohol content (% alcohol in blood as measured mass per volume = mass of alcohol per volume of blood) was 0.15. If we assume the individual drank all of the alcohol at once
Calculate the pH of a 25 mL distilled water sample after the addition of 1mL, 2mL, 3mL, 4mL
draw all three resonance structures for the carbocation intermediate that results from STEP 2 in the electrophilic aromatic substitution reaction when benzoic acid reacts with Br2 in the presence of FeBr3
Explain why it takes longer time when anyone cook an egg in boiling water while camping at in elevation of 0.5km in the mountain than it does it home.
A 150.0-g sample of a metal at 75.0°C is added to 150.0 g of H2O at 15.0°C. The temperature of the water rises to 17.5°C. Calculate the specific heat capacity of the metal, assuming that all the heat lost by the me..
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