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A sealed container holds 1.00 mole of helium and 2.00 moles of nitrogen at 30.0°C. When the total pressure of the mixture is 666 mm Hg, what is the partial pressure of the nitrogen in mm Hg? Provide an answer correct to 2 significant figures. Do not use scientific notation. Do not include units in your answer. For example, if you calculate that the correct answer is 514 mm Hg, simply type "510" in the box without the quotation marks (") or units as part of your answer.
Tin(Sn) exists in Earth's crust as SnO2. Calculate the percent composition by mass of Sn and O in SnO2
Phosphorus-32 has a half-life of 14.0 days. Starting with 6.00g of 32P, how many grams will remain after 84.0 days?
KCL,KCLO3, and MnO2 having a total wight of 23.584 was jeated tp decompose the KCLO3. After heating, the mass was found to be 22.347g. how many moles of oxygen gas was evolved.
how much dry solute would you take to prepare each of the following soluions from the dry solute and the solvent? Part A. 124ml of 0.555M KCl. Part B 10g of .530m KCl. Part C 107g of 5.4% KCl solution by mass.
What is the animal's initial radiation exposure in Curies. If all of the energy from the emitted alpha particles is absorbed by the animal's tissues, and if the energy of each emission is what is the dose in rads to the animal
arrange the elements in order of decreasing first ionization energy.elementradiuselement x 107element y 198element z
The linear form (y=mx+b) of the Arrhenius equation is given below : ln K = -Ea/RT + Ln A 1) In order to find the activation energy (Ea) you will need to make a linear graph
a why is it that a virial expansion can be used to describe the behavior of a real gas? that is what is the rationale
An unknown monoprotic weak acid, HA, has a molar mass of 55.0. A solution contains 2.50 g of HA dissolved 800. mL of solution. The solution has a pH of 2.000. What is the value of Ka for HA
A man has 50 kg of lipids and eats 1 kg of fish a day, which contains 0.5 ppm of methylmercury. What concentration of methylmercury will his lipids achieve?
A piston has an external pressure of 11.0 atm . How much work has been done if the cylinder goes from a volume of 0.150 liters to 0.620 liters.
a 11.7 kg piece of metal at 94.9 c is placed in 481 g of water at 26.1 c in an insulated container. the metal and water
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