Why is buffer composed of compound effective maintaining ph
Why is a buffer composed of HC2H3O2 and NaC2H3O2 more effective maintaining the pH of a solution at pH 4.75 than is a buffer composed of HCN and NaCN?
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Calculate the mass of hydrogen per oxide needed to obtain0.460Lof oxygen gas at STP. 2H2O2(aq) → 2H2O(l) + O2(g)
The half-life of strontium-90 is 28 years. How many grams of this nuclide in a 4.00 g sample will remain after 112 years?
Calculate the mass of glucose in a 105 sample of a 1.18 glucose solution.
A 250 mL stock solution contains 2.3 M Ca(CN)2. When 100 mL of the stock solution is diluted to 125 mL, how many moles of CN- ions will be contained in the dilute solution?
Nitric acid is usually purchased in a concentrated form that is 70.3% HNO3 by mass and has a density of 1.41 g/mL. How much concentrated solution would you take to prepare 1.15L of 0.105M HNO3 by mixing with water? & ;
Assuming the acceleration is constant during each time interval (but not necessarily the same in both intervals), what distance does the shuttle travel during the first 8.00s ?
Fumaric acid, which occurs in many plants, contains 41.4% C, 3.47% H, and 55.1% O by mass. A 0.5 mol sample of this compound has a mass of 58.0 g. What is the chemical formula for this compound?
Tritium is a radioisotope of hydrogen having a half-life of 12.3 years. If you initially had 1.0 ⋅ 10-7 mole of tritium, calculate the decay rate of the sample.
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