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The standard heat of formation of CaBr2 is -675 kJ/mol. The first ionization energy of Ca is 590 kJ/mol and its second ionization energy is 1145 kJ/mol. The heat of sublimation of Ca is 178 kJ/mol. The bond energy of Br2 is 193 kJ/mol, the heat of vaporization of Br2(l) is 31 kJ/mol , and the electron affinity of Br is -325 kJ/mol.
500 mL of 0.22 M HCl and 500 mL of 0.20 M NaOH were added to a calorimeter. Assume both substances have a density of 1 g/mL and a specific heat capacity of 4.184 J/g°C.
A student weighed 0.0961 g of calcium carbonate (FW: 100.08 g/mol) into a 100-mL volumetric flask, dissolved the powder using nitric acid, and diluted to the mark with 0.2% nitric acid.
If a tube contains 4.0 oz of sunscreen, how many kilograms of benzyle salicylate are needed to manufacture 325 tubes of sunscreen?
You are given the following data. S(s) + 3/2 O2(g) → SO3(g) ΔH = -395.2 kJ 2 SO2(g) + O2(g) → 2 SO3(g) ΔH = -198.2 kJ Calculate ΔH
Calculate the pH at the equivalence point in titrating 0.120 solutions of each of the following with 8.0×10-2. hydrobromic acid
If 37.0 mL lead(II) nitrate solution reacts completely with excess sodium iodide solution to yield 0.700 g precipitate, what is the molarity of lead(II) ion in the original solution?
A current of 0.0100 A is passed through a solution of rhodium sulfate, causing reduction of the metal ion to the metal. After 3.00 h, 0.038 g of Rh has been deposited. What is the charge on the rhodium ion, Rhn+? What is the formula for rhodium su..
The compound As2I4 is synthesized by reaction of arsenic metal with arsenic triiodide. If a solid cubic block of arsenic (d 5.72 g/cm3) that is 3.03 cm on edge is allowed to react
What is the formal charge of the N atom in the correct or best Lewis structure for CN-?
a chemical reaction produced .311 g sample of gas which occupied 225 mL at 55 degrees C exerting a pressure of 86 mm Hg. what is the molar mass of the gas?
What volume of ammonia could be made from the reaction of 2.5 liters of nitrogen (N2) and 8.5 liters of hydrogen (H2) at STP?
In combustion studies of the use of H2 as an alternative fuel, HO is sometimes formed in flames by the reaction, H(g) + 1/2 O2(g) HO(g)
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