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A 1.00-L gas sample at 100.°C and 613 torr contains 50.0% helium and 50.0% xenon by mass. What are the partial pressures of the individual gases?
How many amps are required to produce 72.5 g of potassium metal from a sample of molten potassium chloride
The pressure of the gas remaining in the vessel of unknown volume was 0.882 atm. All the measurements were done at the same temperature. What is the volume of the vessel?
A volume of saline solution weighed 25.6 g at 4 degrees celsius. An equal volume of water at the same temperature weighed 24.5 g. What is the density of the saline solution
The secondary bonding of gas molecules to a solid surface is a common mechanism for measuring the surface area of porous materials, by lowering the temperature of a solid well below room temperature, a measured volume of gas will condense to form ..
The activity of a radioactive element, El, decreased by 2.0 % over one year. What is the half-life of this element in years
Calculate the mass of Sodium and Zinc in grams in the following equations using ideal gas law - Determine the amount of Zinc metal in grams consumed in the reaction.
Diisopropyl ether reacts with concentrated aqueous HI to form two initial organic products (A and B). Further reaction with HI produces organic product C from product B
Calculate the molarity of the solution. How many grams of KNO3 are needed to make 450 mL of a solution that is to contain 5.50 mg/mL of potassium ion?
compute the molar mass of the noble gas kryptonkr in a natural sample which is 2.2 80 kr molar mass 79.91 gmol 0.84 78
What is the vapor pressure, at 28 degrees C, of a solution made by mixing 80.0 g of C3H7SH and 120.0 g of CH3CN, if Raoult's Law is obeyed
Determine the pH of a solution containing A) neglecting activities. B) including activities The solution contains BOTH chemicals
write balanced half-reactions and the overall spontaneous reaction. type your answer using the format nh4 for nh4. use
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