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1. What is a chemical reaction equilibrium? How can they be used? Why are they important in chemistry? Explain your ideas and provide at least one relevant example to support your answer.
2. What is a conjugate acid-base pair? How are the acid and base each identified and defined according to Bronsted-Lowry theory? Explain your ideas and provide at least one relevant example to support your answer (see Table 1, in image bellow).
3. What is a buffer? How can buffers be used? Why are they important? Explain your ideas and provide at least one relevant example to support your answer.
4. If the pH of a solution is 5.64, what is the concentration of hydroxide ions in the solution? Note: Show all calculations, follow the rules of significant figures, and box your final answer.
a patient needs to take 625 of ibuprofen twice daily. the pills in the bottle are each 250. . how many pills does the
At 25 °C and 765 Torr, carbon dioxide has a solubility of 0.0342 M in water. What is its solubility at 25 °C and 1470 Torr
A 13 mL sample of a solution of AlBr3 was diluted with water to 27 mL. A 15 mL sample of the dilute solution was found to contain 0.044 moles of Br-. What was the concentration of AlBr3 in the original undiluted solution
Assume that you need to prepare 4-methyl-2-pentyne and discover that the only alkynes on hand are acetylene and propyne. You also have available methyl iodide, isopropyl bromide,
Question- Which of the following is the weakest reducing agent? Which of the following is the weakest reducing agent? Al(s) Mg(s) Al3+(aq) Zn(s) Mg2+(aq)
Calculate the pKa of the second ionizable group of Z.
A system contracts from an initial volume of 15.0 L to a final volume of 10.0 L under a constant external pressure of 0.800 atm
Compute the number of kilograms of hydrogen that pass per hour through a 5-mm-thick sheet of palladium having an area of 0.20 m2 at 500°C. Assume a diffusion coefficient
A solution that has a concentration of 3.00M was made by dissolving 35.0g of Magnesium Chloride in water, How many grams of water are needed for the solution?
Calculate the atomic mass of the unknow metal and identify the metal from the periodic table.
disintegrations per minute per gram of carbon. Using the half-life of carbon-14, 5715 yr, calculate the age of the charcoal sample.
A 130.0 mL sample of a solution that is 2.7×10?3 M in AgNO3 is mixed with a 230.0 mL sample of a solution that is 0.11 M in NaCN. After the solution reaches equilibrium, what concentration of Ag+ (aq) remains?
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