Calculate the total moles of gas present after the reaction
A .483 mol sample of graphite was heated with 2.14 mol oxygen gas to form carbon dioxide. Graphite is the limiting reagent in this reaction. Calculate the total moles of gas present after the reaction?
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How many grams of magnesium chloride, MgCl2, would be required to prepare a 0.2019 m MgCl2 solution by combining this compound with 0.2050 L of water (assume a density of 1.00 g/mL)?
What mass of sucrose should be combined with 462 of water to make a solution with an osmotic pressure of 8.30 at 270 ? (Assume the density of the solution to be equal to the density of the solvent.)
A 1.00-L gas sample at 100.°C and 589 torr contains 50.0% helium and 50.0% xenon by mass. What are the partial pressures of the individual gases?
Calculate the molar concentration of oxygen, in the surface water of a mountain lake saturated with air at 20 degrees celcius and an atmospheric pressure of 665 torr.
A layer of iron(III) oxide forms on the nail, increasing the nail's mass. How much oxygen has reacted with the iron if the mass of the nail has increased to 5.89 g?
An auto technician spills 85 mL of 2.6 M H2SO4 solution from a rebuilt auto battery. How many milliliters of 2.5 M NaHCO3 must be poured on the spill to react completely with the sulfuric acid, making sodium sulfate, carbon dioxide and water?
The electron in a hydrogen atom is excited and makes a transition from n=2 to n=7. Calculate the energy of the photon absorbed in joules. Calculate the wavelength of the photon in meters.
The most common source of copper (rm Cu) is the mineral chalcopyrite (rm CuFeS_2). How many kilograms of chalcopyrite must be mined to obtain 200. g of pure rm Cu?
State the Arrhenius, Bronsted-Lowry, and Lewis definitions of acids and bases. Given an acid-base reaction equation, pick out the acid, base, conjugate acid, and conjugate base. Know the definition of conjugate acids and bases.
What is the total ionic equation for a reaction between a solution of sodium hydroxide (NaOH) and a solution of perchloric acid (HClO4)?
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