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An ingot of aluminum metal with a mass of 87.50 g is to be hammered into a thin sheet to be used as aluminum foil. If the thickness of the aluminum foil is uniformly 13 um, what area of aluminum foil (in cm^2) can be made? The density of aluminum metal is 2.969 g/cm^3.
While 1.22 g of a white solid, supposed of being pure cocaine, a molecular compound, is dissolved in 15.60 g of C6H6 the freezing point is lowered by 1.32 ¬0C. Compute the molar mass of the solid. Kf value for benzene = 5.12C/m.
12.00mL of 0.125M of HCl is required to titrate 21.55mL of Mg(OH)2. Calculate the molarity of the unknown base.
Two isotopic compounds are produced in the synthesis of a new therapeutic drug which must be separated by repeated chromatography cycles. In each cycle, the solution containing both compounds must pass through a chromatography column
What scientific principle or law is used in the process of balancing chemical equations. Define the terms limiting reactant and excess reactant.
Radiation with a 58.4 nm of wavelength interacts with a H 2 (hydrogen atom)and induces the ejection of an electron then determine the kinetic energy of the departing electron express your answer in eV?
If a bottle of nail polish remover contains 181 mL of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788 g/mL.
Calculate how much heat is released when 4.5 g of methane is burned in a constant pressure system. (CH4(g) + 2 O2(g> --> CO2(g) + H2O (l) ,delta H = -890 kJ.
The volume of a certain bacterial cell is 1.60 µm3. What is the volume of 105 cells in liters (L)?
A student takes 195. g of BaCl2, and reacts it according to the following equation: 3BaCl2 + Al2(SO4)3 → 3BaSO4 + 2AlCl3 How many moles of AlCl3 are formed?
Would a buffer containing HF and F- in appreciable quantity be expected to have a pH of around 3,5,7 or 9? Justify your answer.
A block of metal has a width of 3.2 cm, a length of 17.1 cm, and height of 3.5 cm. Its mass is 1.2 kg. Calculate the density of the metal.
Compound A is optically active and has the molecular formula C5H10O. On catalytic hydrogenation (addition of hydrogen) of A, Compound B is obtained
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