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A. Raw milk sours in 4.0 hours at 28 degrees celcius but takes 48 hours to sour in a refrigerator at 5 degrees celcius. Calculate the activation energy for the souring of milk?
B. What is the equilibrium expression for the following reaction
NH4NO3(s)____>N2O(g)+2H2O(g)
Calculate the pH of a solution formed by mixing 65 mL of 0.30 M NaHCO3 with 75 mL of 0.30 M Na2CO3
Consider the titration of 50.0 mL of 0.200 M HOCl by 0.200 M KOH for the next five questions (Ka for HOCl = 3.5 x 10-8). Calculate all pH values to two decimal places.
Isomeric products isolated from free-radical chlorination, Some isomeric products were isolated from the free-radical chlorination of (R)-sec-butyl chloride.
One liter of a buffer solution is prepared by dissolving 0.115 mol of NaNO2 and 0.070 mol of HCl in water. What is the pH of this solution? If the solution is diluted two fold with water, what is the pH?
calculate the amount of energy in kilojoules needed to change 153g of water ice at -10 C to steam at 125 C.
What is the relative kinetic energy between the electron and proton after ionization, that is r=infinity? C) Assume that the electron has all the kinetic energy in part
A compound of bromine and fluorine is used to make UF6, which is an important chemical in processing and reprocessing of nuclear fuel. The compound contains 58.37% by mass of bromine. Determine its empirical formula.
The air track carts in the figure are sliding to the right at 1.0 meter per second. Find the speed of the carts.
Determine the percent yield for the reaction between 3.74g of Na and excess O2 if 5.35g of Na2O2 is recovered
At 0.0 degrees C, if the volume of air is 2.5 mL and the pressure of the atmosphere that day is 805 mmHg, what is the number of moles of air.
A 75 mL solution of 0.030 M Ca(OH)2 is titrated with 0.035 M HCl. Calculate the pH of the mixture after 60 mL of HCl have been added.
A mass of mercury occupies .750L. What volume would an equal mass of ethanol occupy if mercury's density is 13.546 g/mL and the density of ethanol is .789 g/mL?
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