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A compound is found to contain 49.5% carbon, 5.19% hydrogen, 16.5% oxygen, and 28.9% nitrogen. Its molecular mass is 194.2 g/mol. What is its empirical formula? What is its molecular formula? Explain what each of these formulas tells us about the molecule.
Aluminum reacts with excess hydrochloric acid to form aqueous aluminum chloride and 36.8 mL of hydrogen gas over water at 27°C and 764 mmHg. How many grams of aluminum reacted?
patients suffering from respiratory disorders are often treated in oxygen tents in which the atmosphere is enriched in
Calculate the activation energy of a reaction whose rate constant is 4.22 x 10?4 s?¹ at 25°C and 4.54 x 10?4s?¹ at 45°C.
what is the actual amount of magnesium oxide produced when excess carbon dioxide reacts with 42.8grams of magnesium
You used 32 grams of Lime away solution in a titration. The titration required 18.06 ml of a KOH solution which had a molarity of 11.4 m KOH. What is the percent of HC1 in the lime away
A ball is thrown horizontally from the top of a building 19.0 m high and lands 63.7 m from base of the building.
How many theoretical plates does the column have What is the plate height (in mm) of the column if the column is 11.7 cm long
Does the molar solubility of lead(II) iodide increase, decrease, or remain the same with the addition of potassium iodide to the solution? Explain
What is the expression for the energy difference between the lowest energy state and the first excited state of the benzene Pi system. Please leave your answer in terms of variables and constants; do not substitute.
How many grams of solid barium sulfate form when 21.9 mL of 0.160 M barium chloride reacts with 66.8 mL of 0.055 M sodium sulfate. Aqueous sodium chloride is the other product.
A solution is prepared by dissolving 10.8g ammonium sulfate in enough water to make 1.00 mL of stock soultion. A 10.00 mL sample of this stock solution is added to 50.00mL of water. Calculate the concentration of ammonium ions and sulfate ions in ..
Calculate the expansion work done against a constant external pressure of 0.997 atm and at a constant temperature of 24°C. Assume that the initial volume of dry ice is negligible and that CO2 behaves like an ideal gas. find in Kj
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