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Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n = 3 to n = 1?
What mass of PbCl2 is formed from mixing 0.334 L of 0.112 molar NaCl with 2.12 L of 0.0343 molar Pb(NO3)2?
If 1.00 g of an unknown molecular compound contains 8.35 x1021 molecules, what is its molar mass
The specific internal energy of helium at 300k and 1 atm pressure is 3800j/mol and the specific molar volumeat thesame temp. and pressure is 24.63l/mol.
A.E. Dyer supplied 45.9 cal of heat energy to a 156-g piece of aluminum block that was kept at 28 degree C. What is the final temperature of the aluminum block?
Determine the expression for the rate of reaction with respect to each of the reactants and products
A compound contains atoms of three elements X, Y and Z.The oxidation numbers are X +2, Y +5 & Z -2.formula ? How can we formulate formula of a ternary compound using their valency?
What is the maximal amount of lead (II) iodide (the theretical yield) that can be obtained when 0.75 moles of lead (II) nitrate and 83 g potassium iodide are mixed together
Grignard reagents can be used as nucleophiles in other reactions such as SN2 reactions. What would be the product for the following SN2-like reaction of an epoxide?
What is the theoretical yield of aspirin if 167 kg of salicylic acid is allowed to react with 123 kg of acetic anhydride?
A piece of metal with a mass of 151 g is placed in a 50 mL graduated cylinder. The water level rises from 20. mL to 35 mL. What is the density of the metal?
A solution is prepared by mixing 75.0 mL of 5.00 M HCl and 20.0 mL of 8.00 M HNO3. Water is then added until the final volume is 1.00 L. Calculate [H+], [OH -], and the pH for this solution.
How much ethylene glycol (C2H6O2) the major component of antifreeze, must be added to 1 L of water to keep it from at -15 F? Kf= 1.86 C/m.
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