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What is the pressure in atmospheres inside a container of gas connected to a mercury-filled open-end manometer when the level in the arm connected to the container is 28.0cm higher than the level in the arm open to the atmosphere and the atmospheric pressure reading outside the apparatus is 1.017atm?
lungs now contain 0.15 moles of oxygen gas, and 0.60 moles of nitrogen gas. If your lungs are at 1.4 atm of total pressure, what is the partial pressure of oxygen gas inside your lungs?
Calculate the mass of NaHCO3 that was used up in the reaction for each beaker. The molecular weight of NaHCO3 is 84.007 g/mole.
A 2.29 g sample of ascorbic acid is titrated with a 0.64 M red dye. What volume of red dye is required to reach the endpoint?
A sample of an element has a volume of 81 mL and a density of 1.73 g/mL. What is the mass in grams of the sample (round to the nearest tenth)?
what is the global pH change incurred after injection of the HCl? What would the pH change be if this same amount of 1.000 M HCl were put into a gallon of pure water?
A 25.0-mL sample of 1.00 M NH3 is titrated with 0.15 M HCl. What is the pH of the solution after 15.00 mL of acid have been added to the ammonia solution? Kb = 1.8 × 10¯5
50.0 mL of an HCl solution with a pH of 3.5 neutralizes 200.0 mL of a Ca(OH)2 solution.What is the molarity of the Ca(OH)2 solution?
At a certain temperature, reaction has equilibrium constant (Kc) of 1.9 x10^19. Determine the equlibrium constant for the reaction based on this information at the same temperature.
Which too factors determine whether a collision between two reactant molecules will result in a reaction. select all that apply.
Need help figuring out the proper steps on how to solve -What volume of 1.25M HCl in liters is needed to react completely
We use standard addition methods when our sample has matrix effects which are hard to duplicate in a blank. Let's again find the amount of Pb+2 in a blood sample. A 5.00 mL blood sample containing lead yielded a signal of 0.712 units.
An aqueous solution has a vapor pressure of 84.0 at 50 . The vapor pressure of pure water at this temperature is 92.6 . What is the concentration of in mass percent?
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