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5 moles of hydrogen and 4 moles of nitrogen react at a temperature of 100 C in an 8.0 L flask to produce 3 moles of ammonia measured once equilibrium is reached. Calculate K at that temperature.
What is the silver ion concentration in a solution prepared by mixing 341 mL of 0.350 M silver nitrate with 375 mL of 0.437 M sodium phosphate
The two isotopes of uranium, U-235 and U-238 can be separated by effusion of the corresponding UF6 gasses. What is the ratio of the root mean square speed 238-UF6 to that of 235-UF6
Prepare a standard curve of absorbance versus known cobalt nitrate concentrations and determine the concentration of cobalt (H) ion obtained from a soil sample.
Given the acid is diprotic and its pKa is 1.90 and 6.70, estimate the PH after 10 mL of base are added? After 20 mL basea added? After 30 mL Base added?
Administration of digitals, a drug used to control atrial fibrillation in heart patients, must be carefully controlled because even a modest overdosage can be fatal. To take differences between patients into account, drug dosages are prescribed in..
A 0.00445 mol sample of a weak acid, HY, is dissolved in enough water to form 0.0976 L of solution. If the pH of the solution is 4.02, what is the Ka of HY? Use E notation with 3 significant figures.
The following quantities of trace gases were found in 1 mL sample of air. Calculate the number of moles of each compound in the sample.
Sulfuric acid is mixed with aqueous sodium hydroxide to produce water and sodium sulfate. Liquid C6H12 is burned in air.
Determine the pH of the buffer. Write the complete ionic equation for the reaction that occurs when a few drops of nitric acid are added to the buffer.
Consider the reaction with the rate law, Rate = k[BrO3-][Br-][H+]2 By what factor does the rate change if the concentration of H+ is decreased by a factor of 3
How many grams of magnesium chloride must be dissolved in 568 g of water to give a solution that freezes at -2.38°C
what is the molarity of a solution prepared by dissolving 15.07 g of hcl in enough water to make 920.72 ml of solution?
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