What is the percentage of sodium bicarbonate in the mixture
A 3.23 gram sample of a sodium bicarbonate mixture was reacted with excess acid. 48.52 mL of the evolved gas was collected over the water at 0.930 atm and 23.0 degrees Celsius. What is the percentage of sodium bicarbonate in the original mixture?
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Compute the mean of the sample means and compare it to the population mean. (Round your answers to 1 decimal places.)
A spelunker is surveying a cave. She follows a passage that takes her a distance 173 straight west, then a distance 200 in a direction 45.0 east of south, then a distance 288 at 30.0 east of north. After a fourth unmeasured displacement she finds
The now stays laminar until a noisy air compressor is turned on in the laboratory. Then it suddenly goes turbulent. Calculate the ratio of the turbulent n to the laminar [n turb = 4429 W/m2K.]
Find the probability that he gets at least 3 emails on a particular day? What is the standard deviation of the number of emails that Tim gets in one day?
Use properties evaluated at [(20 + 4 0)/2 ] degree C for the whole problem, but report the local error in h at the end to get a sense of the error incurred by the simplification.
Epsom salts are hydrates of magnesium sulfate. The formula for Epsom salts is MgSO4 . xH2O. A 7.834g sample is heated until a constant mass of 3.825g is obtained, indicating that all the water has been evaporated off.
Household bleach is a 5 mass % aqueous soln. of sodium hypochlorite(NaOCl). What is the molality of the bleach. What is the mole fraction of NaOCl in the bleach.
Find the equation of the path, y=f(x), and then determine the ball's velocity and the normal and tangential components of its acceleration when t=0.25s.
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