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A flask contains 300mL of 0.12M phosphate buffer that has a pH of 7.2. What volume of 0.2M HCl should be added to drop the pH to 6.7
Draw the best Lewis structure of CO32-. In this compound, the C atom is attached to three O atoms, and there are no O-O bonds
The density of the hydrogen peroxide solution is 1.01 g/mL and the solution contains 3.40% H202 by mass. The vapor pressure of water at 24C is 22 mmHg. Based on this data and information calculate the molar volume at STP.
Show by flow diagram the reaction equation for how you could resolve a racemic carboxylic acid [(+-)-RCOOH] using an enantiomerically pure amine
0.134 mole of kcl and 0.248 mole of cacl2 were dissolved in water. calculate the total number of moles of cl- ions in the solution.
What volume of 1.50 M HCl in liters is needed to react completely (with nothing left over) with 0.500 L of 0.200 M Na2CO3? Express your answer numerically in liters.
Milk will sour in about eight hours at 21*C (70*F = room temperature). How long will raw milk last in a refrigerator maintained at 5*C? Assume the rate constant to be inversely related to souring time.
suppose a 0.100 M solution of each of the following substances is prepared. Rank the pH of the resulting solutions from lowest to highest: KF, NH4I, HBr, NaCl, LiOH.
For each of the following pairs, indicate which substance possesses the larger standard entropy. (BE SURE to circle one in each pair). a. 1 mol of He (g) in 3 L @ 298 K OR 1 mol He (g) in 3 L @ 400 K
The decomposition of nitrosyl bromide is shown below (Kp=2.3*10^-3) if .25 atm of each gas is initially present is the reaction at equilibrium? If not explain the direction the reaction must proceed to reach equilibrium.
a solution contains 10.0g of koh and 900.0ml of water. the volume of the solution is 904.7ml. what is the mass percent
Tris is widely used in a biochemical laboratory. Its acid dissociation constant is 8.32 x 10^-9. You have available at your lab bench a 0.1 M solution of Tris in its protonated form, 0.1 M solution of HCL and NaOH, and ample distilled water. Descr..
Consider the reaction: CaCO3(s)===CaO(s)+CO2(g) An equilibrium mixture of this reaction at a certain temperature was found to have [CO2] = 0.478M. What is the value of the equilibrium constant at this temperature
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