Calculate the empirical and molecular formulas
One compound of mercury with a formula mass of 519 g mol-1 contains 77.26%Hg, 9.25%C, and 1.17%H (with the balance beingO). Calculate the empirical and molecular formulas.
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When sodium reacts with chlorine, 411 kj/mol is released. Calculate the amount of heat released if 1.37 mol of sodium form.
A 0.1946 g piece of magnesium metal is burned in a constant volume calorimeter that has a heat capacity of 1349 J/°C. The calorimeter contains 500 g of water and the temperature rise is 1.40°C. Calculate the heat of combustion of magnesium
Assume you dissolve .297 g of the weak acid benzoic acid in enough water to make 105 mL of solution and then titrate the solution with .141 M NaOH. What are the concentrations of Na+ at the equivalence point?
When 79.272 g of nitrogen gas is reacted with 79.272 g of hydrogen gas, how many grams of ammonia are formed?
A 0.456 gram sample of an unknown mono protic acid (let's call it HZ) was dissolved in some water (you pick the amount). Then the acidic solution was titrated to the equivalence point with 32.5 mL of 0.174 M KOH. What is the molecular weight of th
The density of pure silver is 10.5 g/cm3 at 20°C. If 6.17 g of pure silver pellets is added to a graduated cylinder containing 14.1 mL of water, to what volume level will the water in the cylinder rise?
What is the mechanism of the reaction between benzophenone with sodium borohydride and indicate what bonds are broken/formed and draw arrows to show what happens to the electrons as bonds break and form?
What is the concentration of vitamin C in the juice in mg vitamin C/100 mL of juice (mg/ 100 mL)?
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