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(a) A 159 mL sample of 0.029 M NaCH3CO2(aq) is diluted to 0.548 L. What is the concentration of acetic acid at equilibrium?
(b) What is the pH of a solution resulting from the dissolution of 2.09 g of NH4Br in water to form 0.371 L of solution?
The mole fraction of potassium nitrate in an aqueous solution is .0194. The density of the the solution is 1.0627 g/mL. Calculate the molarity of the solution.
what is the frequency of the photons emitted by hydrogen atoms when they undergo transistions from n=5 to n=3
4.41-g sample of a salt dissolves in 9.10 g of water to give a saturated solution at 25°C. What is the solubility (in g salt/100 g of H2O) of the salt.
If 17.5 moles of an ideal gas occupies 0.0455 cubic meters at 70.5°C, what is the pressure of the gas?
A test solution contained 2 mL of 0.10 M Ag+. A silver strip was dipped into the test solution, and a cell potential of 0.0592 V was measured against an Ag/Ag+(1.0M) reference half-cell.
Choose the element with more negative (more exothermic) electron affinity from each of the following pairs.
When 0.450kJ of heat is added to the gas, it expands and does 219J of work on the surroundings. What is the value of \Delta H for this process? Answer in units of kJ
A gas is initially at 1.2 atm, 15.0 L, and O°C. What is the final pressure when the same amount of gas is heated to 10°C and the volume changed to 24.0 L
What mass of NaCl is needed to react with 35.0 mL of the same AgNO3 solution?
how many milliliters of 0.54M HCL solution are needed to react completely with 4.6g of zinc to form zinc (II) chloride?
An asteroid fragment contains carbon, it may burn when entering the Earth's atmosphere. What is the most likely compound to result from this process
Calculate the molality of a solution that contains 51.2 g of naphthalene, C10H8, in 500. mL of carbon tetrachloride. The density of CCl4 is 1.60 g/mL.
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