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A beaker with 170 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 8.70 mL of a 0.370 M HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760.
calculate how much more quickly 235 ^UF6 effuses than 238 ^UF6. give the answers as the ration of rates of 235 ^UF6 to 238 ^UF6 to four decimal places.
What is the boiling point of a solution made by adding 6.79 g of magnesium chloride to 242.0 g of water?
How many grams of chromium would be electroplated by passing a constant current of 5.2 amperes through a solution containing chromium(III) sulfate for 45.0 minutes.
starting with 1.342 g Zn and excess HCL, the volume of H2 gas collected was 472 mL. the atmospheric pressure was 754 mmHg and the temperature was 21 degrees C. write a balanced equation and calculate the moles of h2 produced by the reaction.
The mass spec of a yellow, diamagnetic solid A, a neutral metal carbonyl, reveals a molecular ion peak of 390 amu. A fragmentation pattern consisting of sequential losses of 28 amu (CO) occured until m/z = 110 amu.
Consider the combustion reaction: CH4 (g) + 2O2 (g) = CO2 (g) + 2H2O (l) Is this an exothermic reaction? If 100g of natural gas (CH4) is burned, calculate the heat exchange (balance the equation)
(R)-(3-Chloro-2-methylpropyl) methyl ether (A) on reaction with azide ion (N3-) in aqueous ethanol gives (S)-(3-azido-2-methylpropyl) methyl ether (B). Compound A has the structure ClCH2CH(CH3)CH2OCH3. Draw the wedge-dash, wedge-line formula for A..
Design a reaction scheme to synthesize pentylbenzene from benzene using a Friedel-Crafts acylation and any other reaction
A Freon leak in the air-conditioning system of a large building releases 20kg of CHF2CL per month. If the leak were allowed to continue, how many kilograms of Cl would be emitted into the atmosphere each year
Reaction of NO with chlorine to yield NOCl is pseudo-first order if NO is present in a large excess. Determine the rate constant of this reaction i
Aluminum has a specific heat of 0.880 J/g-deg. How many joules are needed to heat 155g of Al from 20.0oC to 75.0oC
What is the heat change of H 2 O If the final temperature of the mixture = 25 degree celsius?
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