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A balloon filled with helium gas has a volume of 361 mL at a pressure of 1atm. The balloon is released and reaches an altitude of 6.5km, where the pressure is 0.5atm. Assuming that the temperature has remained the same, what volume does the gas occupy at this height? Answer in units of mL.
HClO is a weak acid (Ka = 4.0 × 10-8) and so the salt NaClO acts as a weak base. What is the pH of a solution that is 0.087 M in NaClO?
Compute the number of moles of H2O will be formed from the reaction 75.1g benzene?
The percentage of an additive in gasoline was measured six times with the following results: 0.14, 0.15, 0.16, 0.17, 0.20, 0.11%. Find the average and RSD and 90% confidence intervals for the percentage of the additive.
Visualize whats happening at the molecular level and explain how your products wind up in the Hickman's collection well. What would happen if you placed the Hickman above the water condenser?
What is the pH of a sodium formate solution prepared by adding 0.680 grams of sodium formate to 100.0 mL of water at 25.0 degree C? Ka of formic acid at 25.0degree C is 1.8*10-4.
What is the volumetric flow rate of gases out the stack (m3/min)? Note - in these units, R has a value of 0.08206 atm-m3/kmol-K.
why does the color change from blue to green or yellow near the endpoint of titration when the indicator is bromocresol green
A sample of N2 gas occupies 2.40L at 20 degress cecius. if the gas is in a container that can contract or expand at constant pressue, at what temperature will the N2 occupy 4.80 L?
A large gas flask is found to weigh 143.567 g. it is then filled with gas to a pressure of 735 torr at 31 C and found to weigh 1067.9 g.
What is the pH after 0.150mol of HCL is added to the buffer from part A? Assume no volume change on the addition of the acid.
Benzoic acid is used to titrate an unknown base, and the pH of solution is recorded during the titration. Halfway to the ultimate endpoint of the titration, the pH of solution was recorded at 7.64. What is the value of Kb for the unknown base?
36.45 mL of 0.11 M hydrochloric acid were added to 36.45 mL of 0.098 M aqueous barium hydroxide. Calculate the theoretical yield of the salt produced.
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