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What is the enthalpy change for converting 1.00 mol of ice at -50.0°C to water at 70.0°C? The specific heats of ice, water, and steam are 2.09 J/g-K, 4.18 J/g-K and 1.84 J/g-K respectively. For H2O, Hfus = 6.01 kJ/mol, and Hvap= 40.67 kJ/mol.
What is the percent by mass of NaHCO3 in a solution containing 20 g NaHCO3 dissolved in 700 mL H2O?
What is the theoretical percent, by weight, of calcium in Ca(OCl)2
A pressure of 0.600 atm of nitrosyl chloride is sealed in a flask and allowed to reach equilibrium. If 27.0% of the NOCl decomposes, what is the equilibrium constant for the reaction?
Draw the Lewis structure for C1F 2 + (small s at bottom and small + at top) What are its electron-pair and molecular geometries? decribe the bonding in the molecule in terms of hybrid orbitals.
aluminum has a density of 2.70g/cm3. how many cubic centimeters will 200.0 grams of aluminum occupy?
Barium imparts a characteristic green color to a flame. The wavelength of this light is 551nm. Determine the energy involved in kj/mol.
Ba(OH)2 is dissolved in 100 grams of water at 90 degrees celsius until the sloution is saturated. If the solution is then cooled to 45 degrees celsius, how many grams of Ba(OH)2 will precipitate out of the solution?
At 350 K, Kc = 0.142 for the reaction 2BrCl(g) -> Br2(g) + Cl2(g) An equilibrium mixture at this temperature contains equal concentrations of bromine and chlorine, 0.058 mol/L. What is the equilibrium concentration of BrCl? Answer in units of M.
A 3.5g sample of water reacts with PCl3 according to the following equation: 3H2O+PCl=H3PO3+3HCl How many g of H3PO3 are produced.
A 10.0 mL sample of sulfuric acid from an automobile battery requires 35.08 mL of 2.12 M sodium hydroxide solution for complete neutralization.
if you have 4 moles of hydrogen gas, how many moles of oxygen gas are needed for complete reaction?
A mass of 2.052 g of a metal carbonate, MCO3, is heated to give the metal oxide and 0.4576 g CO2.
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