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A buffer contains equal amounts of a weak acid and its conjugate base and has a pH of 5.25. Which of the following values would be reasonable to expect for the pH after addition of a small amount of HCl? The answer: 5.15
What is the relative concentration of the food dye that gives rise to the green color in Monday's dessert compared to Tuesday's dessert.
supposed 175 mmol of NH3 and 131 mmol of O2 are added to an empty flask how mych NH3 will be in the flask at equilibrium.
1000g of Na2HPO4 is dissolved in 100mL of water. using mass balance and charge balance deterimne the pH of the resulting.
The sample is diluted with 72.178 g of water. A 14.024 g aliquot of this solution is then titrated with 0.1097 M HCl. It required 29.55 mL of the HCl solution to reach the methyl red endpoint. Calculate the weight percent NH3 in the aqueous waste.
Propose a structure for a molecule with a molecular formula C10H13NO and the following 1H NMR data. Briefly explain your answer.
Consider an amphoteric hydroxide, M(OH)2(s), where M is a generic metal. M(OH)2 --> M^(2+0 +2OH^(-) Ksp= 5x10^(-16) M(OH)2 +2OH^(-) --> M(OH)4^(2-) Kf= 0.07. Estimate the solubility of M(OH)2 in a solution buffered at pH = 7.0, 10.0, and 14.0.
Fe3O4 reacts with CO according to the reaction Fe3O4(s) + 4CO(g) --> 4CO2(g) + 3Fe(s). If 201 grams of Fe3O4 is reacted with excess CO, what mass of CO2 will be produced?
A packet of the same soup sold in the U.S. would have the same nutritional information in kilocalories per cup. There are two cups in a pint. How many nutritional calories would be quoted per cup of prepared soup?
A person preparing a fish tank uses boiled (and then cooled) water to fill it. When the fish is put into the tank, it dies. Explain.
1.0 M acid and two pt electrodes connected to a voltmeter. You then add 10.00 ml of 1.00 M Fe^+2 solution to the beaker. The temperature of the solution is maintained at 25 C.(R= 8.314 coulomb V/(mol K), F= 9.64853 x 10^4 coulomb/mol)
What is the final volume of a balloon that was initially 500.0 mL at 25 °C and was then heated to 50 °C
Draw the structures of the following amines and classify each as 1 degree, 2 degree, 3 degree, or 4 degree amine. Include Hydrogen Atoms.
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