What volume of this acid would you dilute with water
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?
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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?
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.
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.
Assume 20% of all heart transplant patients do not survive the operation. Think about taking repeated random samples of 371 patients from this population.
An unknown alcohol is analyzed by freezing point depression. The unknown is either ethanol ( C2H5OH ) methanol ( CH3OH ) , or propanol ( C3H7OH ).
Assume that the drying time for certain kind of paint under specified test conditions is known to be normally distributed with mean 75 minutes and standard deviation 5 minutes.
A solution is prepared by mixing the 2.17 grams of an unknown non-electrolyte with the 225.0 grams of chloroform. The freezing point of the mixture is -64.10oC, while the freezing point of pure chloroform is -63.50oC.
Determine a 95 % confidence interval for the mean maximum sentence of all murders. Assume a population standard deviation of 20 months.
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