Explain what mass of sodium fluoride must be added
What mass of sodium fluoride must be added to 250. ml of a0.100 M HF solution to give a buffer solution having a pH of 3.50 ?ka(HF) =7.1 x 10^-4
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Calculate the value of the reaction quotient, Qp, at 25C for this reaction when the pressure of nitrogen is 2.9atm, the pressure of hydrogen is 1.3atm, and the pressure of ammonia is .70atm.N2 + 3H2 >>> 2NH3
Estimate the time required to achieve the same concentration at a position 6.0mm from the surface for an identical steel and at the same carburizing temperature.
(a) When the internal resistance is adjusted for maximum power transfer, what is the efficiency? (b) What should be the internal resistance for maximum possible efficiency?
The Ohio Department of Agriculture tested 203 fuel samples across the state in 1999 for accuracy of the reported octane level. For premium grade, 14 out of 105 samples failed (they didn't meet ASTM specification and the FTC Octane posting rule). H
We determined the sodium content of 15 boxes of corn flakes 300 grams. The data (in milligrams) are: 128.77, 131.15, 129.65, 132.33, 130.54, 130.72, 131.67, 133.02, 127.98, 130.12, 129.37, 129.91, 130.19, 128.64 and 131.62. There is sufficient evi
A survey of 600 non-fatal accidents showed that 166 involved the use of a cell phone. Construct a 99% confidence interval for the proportion of fatal accidents that involved the use of a cell phone.
Determine the net power developed, in kW. the rate of heat transfer to the steam passing through the boiler, in kW. The thermal efficiency.
Starting from rest, a 91-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 760 N, and his speed at the bottom of the pole is 3.5 m/s. How far did he slide down the pole?
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