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A given PH meter can be read with a standard deviation of +- PH units throughout the range 2 to 12 calculate the standard deviation of [H3O+] at each end of this range
which reagent will be in excess? What will the concentration of the of the excess be?
A 4.78- sample of aluminum completely reacts with oxygen to form 6.67 of aluminum oxide. Use this data to calculate the mass percent composition of aluminum in aluminum oxide.
A sparingly soluble salt gets precipitated only when the product of concentration of its ions in the solution (Qsp) becomes greater than its solubility product. If the solubility of BaSO4 in water is 8 × 10-4 mol dm-3, calculate its solubility in ..
Write equations illustrating the reactions with water of the following acids. Indicate strong acids with a single arrow and weak acids with equilibrium arrows. Use hydronium ion in you answer if needed.
When solutions containing silver and chloride ions are mixed, silver chloride precipitates: Ag+ (aq) plus Cl- (aq) ---> AgCl(s)
what is the amount of hydrogen in g in the sample? Vapor pressure of water at 20 degrees celsius is 17.5 torr.
for the reaction represented by the equation cl2 + 2kbr 2kcl +br2 how many moles of potassium chloride are produced from 119 g of potassium bromide?
A compound contains only carbon and nitrogen and is 46.2% carbon by mass. A gaseous sample of the compound has a density of 2.05 g/L at 927 torr and 105 °C
A Balloon with a volume of 2.00 L is at a pressure of 1.5 atm and a temperature of 20C. If the balloon is put into a container and the pressure is increased to 2.0 atm and the temperature is raised to 25C, what is the new volume of the balloon?
An energy maximum in a reaction-energy diagram would be labeled as which of the following?
dissolving 16.45 g potassium chloride in 86.77 g water. What is the concentration in weight percent for this saline solution?
Calculate the rate constant for the reaction when the reactant concentration in a first-order reaction is given 7.30×10-2M after 15.0s and it is also reported 4.40×10-3M after 65.0s . ?
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