What mass of calcium carbonate is contained
A sample is marked as containing 42.7% calcium carbonate by mass.What mass of calcium carbonate is contained in 33.9 grams of the sample?
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A population is normal with a variance of 17. Suppose you wish to estimate the population mean, u. Find the sample size needed to assure with 68.26% confidence that the sample mean will not differ from the population mean by more than 3 units.
A 0.4400-g sample of impure Ca(OH)2 is dissolved inenough water to make 43.90 mL of solution. 20.00 mL of theresulting solution is then titrated with 0.2554-M HCl.
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