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If someone gave you a sample of metallic element, explain what physical properties might you use to identify the element? Presume you have a reference such as the handbook of chemistry and physics that lists physical properties of the elements.
The solvent for an organic reaction is prepared by mixing 60.0 of acetone () with 56.0 of ethyl acetate (). This mixture is stored at 25.0 . The vapor pressure and the densities for the two pure components at 25.0. What is the vapor pressure of th..
Cyclohexane can be used as a solvent for freezing point depression measurements. When 1.07 g of naphthalene (MW = 128.17 g/mol) is mixed with 51.29 g of cyclohexane, the freezing point of the resulting solution is 3.29 °C.
A gas mixture is made by combining 7.2g each of Ar, Ne, and an unknown diatomic gas. At STP, the mixture occupies a volume of 92.04L. What is the molar mass of the unknown gas in g/mol, and identify the unknown gas
In photosynthesis, plants use energy from the sun in combination with carbon dioxide and water to form glucose (C6H12O6) and oxygen. If 4.50 moles of water react with carbon dioxide, what mass of glucose is produced?
Provide a chemical based explanation for the observation that acid-base neutralization reactions are exothermic
Write the equations that represent the first and second ionization steps for selenic acid (H2SEO4) in water.
A 303- sample of unknown solution reacts completely with to form 14.1 . What was the concentration of the solution?
Calculate the solubility of AgBr in (a)H2O (b) 1.0M hypo. Kf of Ag(S2O3)2^3- is 4,7 x 10^13 and Ksp AgBr is 5 x 10^-13.
write a program to compute the diameter in centimeters of a steel rod an aluminum rod and a copper rod which can
Work function. A photon with 250 nm wavelength hits an Au surface (work function 5.28 eV). What's the kinetic energy (in eV) of the ejected electron? What's its speed (in km/s and mph)
A 0.233 g sample of an unknown monoprotic acid was titrated with 0.105 M KOH and the resulting titration curve is shown below. It took 35 mL to reach the equivalence point. What is the molar mass of the acid
Calculate a (alpha) for a solution of pH = 5.00 produced from sulfurous acid (H2SO3) K_a1 = 1.72x10^-2 and K_a2 = 6.43 x 10^-8
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