Calculate the mass of hydrogen per oxide
Calculate the mass of hydrogen per oxide needed to obtain0.460Lof oxygen gas at STP. 2H2O2(aq) → 2H2O(l) + O2(g)
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He slides so that his speed is zero just as he reaches the base. How much mechanical energy is lost due to friction acting on the runner?
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A 1.00-g sample of carbon from a modern source gave 22 080 disintegrations per day. If the decay constant of carbon-14 is 1.2 × 10-4 y-1, what is the age of the dish?
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?
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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?
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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