How can find the percent by mass of calcium carbonate
Dissolving the 3.00g of an impure sample of calcium carbonate in hydrochloric acid produced 0.656L of carbon dioxide calculated at the 296K and 792mmHg Determine the percent by mass of calcium carbonate in the sample.
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Determine the purpose of washing the crude product with saturated sodium carbonate? Could dilute sodium hydroxide be used instead of the sodium carbonate?
Determine the numbers of molecules of water of hydration are present in the 630mg of oxalic acid (H2C2O4 .2H2O)
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A log is known to be either oak or pine. It displaces 2.7gal of water and weighs 19.8lbs. Is the log oak or pine? Which is having the density of oak=0.9g/cm^3; density of pine=0.4g/cm^3, Have to use conversions, not sure where to start?
You wish to estimate the proportion of adults that have ever used alternative medicine. Obtain a sample size that will ensure a margin of error of at most 0.01 for a 95% confidence interval.
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A concentrated solution of hydrochloric acid is 38.0% hydrogen chloride and has a density of 1.19 g/mL what volume of this acid would you dilute with water to prepare 8.00mL of 0.100mol.L-1 hydrochloric acid?
An unknown alcohol is analyzed by freezing point depression. The unknown is either ethanol ( C2H5OH ) methanol ( CH3OH ) , or propanol ( C3H7OH ).
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