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A balloon filled with helium gas has a volume of 620 mL at a pressure of 1 atm. The balloon is released and reaches an altitude of 6.5 km, where the pressure is 0.5 atm. Assuming that the temperature has remained the same, what volume does the gas occupy at this height?
A solution of ethanol (C2H5OH) in water is prepared by dissolving 63.4 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution.
A beaker with 130 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M.
10.0 grams of sodium bicarbonate reacts with 50.0 mL of 2 M acetic acid, what is the limiting reactant? what reactant is in excess, and by how much? what volumeof carbon dioxide gas would form?
Suppose that each sphere represents 6.7×1021 molecules and that the volume of the container is 1.0 L. What is the rate constant for the reaction in the usual units?
Imagine that you have a 7.00 gas tank and a 3.50 gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch.
How many mL of a 0.8 M NaOH(aq) solution are required to make 500 mL of a solution with pH=12.50?
A voltaic cell employs the following redox reaction: Sn^2+(aq)+ Mn(s)--> Sn(s) + Mn^2+(aq) Calculate the cell potential at 25 under each of the following conditions.
What is the nature of the substance(non polar, polar, ionic) and intermolecular force(ionic or van der waals if van der walls give type including h-bond)
What would be the value of the change in concentration of C10H12/change in time during the same period of time? Explain why a catalyst for a forward reaction must also be a catalyst for the reverse reaction. Include an energy level diagram
a gas is placed in a balloon with a volume of 3.0L at 35C and 800 torr. What would be the new volume for the gas if placed under STP
A bottle contains 225 mL of insulin at a concentration of 50.0 mg/mL. What is the total mass of insulin in the bottle?
what is the rate constant for this reaction at 398 K ? I know that the answer is 1.2 s-1 but I don't know how to get it . Can anyone explain it to me please?
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