What is the final concentration of the acid
A dilute solution of benzoic acid, C6H5COOH, is prepared by adding 7 mL of 1.85 M benzoic acid to a volumetric flask and adding enough water to bring the total volume of solution to 250 mL. What is the final concentration of the acid?
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If a 1.201 g sample of aluminum metal is heated in a chlorine gas atmosphere, the mass of aluminum chloride produced is 5.934 g. Calculate the empirical formula of aluminum chloride.
How many energy levels are present in the 3s conduction band of a single crystal of sodium weighing 26.8 mg? How many electrons are present in this band?
A compound having an approximate molar mass of 120-15 g has the following percent composition by mass: carbon, 38.44%; hydrogen, 4.839%; chlorine, 56.73%. Determine the empirical and molecular formulas of the compound.
Consider a 0.05-mm thick, 500 mm2 piece of aluminum foil. How many unit cells exist in the foil? Calculate the mass of each unit cell using density of aluminum of 2.71 g/cm3.
An atom has an electron with energy -9.00E-19 J. It absorbs a photon and moves to a new level with energy -4.00E-19 J. What is the wavelength of the photon in nm?
If 1.4 M H2SO4 is used to titrate a 300.0 mL solution of 1.76 M ammonia (NH3), what volume of acid is required to completely neutralize the base? Each mole of this strong diprotic acid produces two moles of hydronium ions in water.
Calculate the concentration of a solution prepared by adding enough water to 2.2 g of sucrose (C12H22O11) to make a total of 50 mL of solution.
For the first irder reaction 2N2O5 --> 2N2 O4 + O2 at a particular temperature, the half - life of N2O5 is 0.90 hr . What fraction of the initial concentration of N2O5 will remain after 2.4 hours?
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