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Calculate the lattice energy of Na2O for the following data:
Ionization energy of Na(g):::495kj/mol
Electron affenity of O(g) for 2e-:::603 kj/mol
Energy to vaporize Na(s):::109 kj/mol
O2(g) bond energy:::499 kj/mol
Energy change for the reaction 2 Na(s) + 1/2 O2(g)---->Na2O(s)
Calculate how many grams of ATP must be produced to walk a mile. ATP synthesis is coupled to the oxidation of glucose (?Go' = -686 kcal/mol). How many grams of glucose are actually metabolized to produce this amount of ATP?
A balloon with an initial volume of 3.8 L at a temperature of 305 K is warmed to 385 K. What is its volume at the final temperature?
The average concentration of calcium ion in seawater is 412 mg of calcium ion per kg of seawater. What is the molarity of the calcium ion if the density of the seawater is 1.025 g/mL?
A urine sample contains 46.5mgL-1 of ethanol. The density of ethanol is 0.79gcm-3. What is the concentration expressed as %v/v
How many milliliters of a 0.56 M HCl solution do you need to obtain 0.0046 mol of HCl?
What is the half-life of a compound if 78 percent of a given sample of the compound decomposes in 45 min? Assume first-order kinetics.
At 0.0oC, if the volume of air is 2.6 mL and the pressure of the atmosphere that day is 815 mmHg, what is the number of moles of air?
A 10 liter sample of oxygen 0.0°C and 15 cm. pressure is subjected to 150 cm. pressure at the same temperature. What is the new volume of the oxygen?
Properties of subatomic particles - Fill in the missing relative masses and relative charges for each of the subatomic particles
Calculate what the limiting reactant is in the reaction between copper (II) oxide and hydrochloric acid
To obtain the same antifreeze protection requires 76 g of propylene glycol to replace each 62 g of ethylene glycol. Calculate the mass of propylene glycol required to replace
What is the molarity of a solution of 12.0 g of NH4Br in enough H2O to make 240 mL of solution?Answer in units of M.
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