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A disinfectant solution is made by dissolving 4.50 g of hydrogen peroxide (H2O2) in 143.2 g of water. Calculate the mass percentage of hydrogen peroxide in the solution. What is the concentration of hydrogen peroxide in parts per million? What is the molarity?
Calculate ΔH° for the reaction -> 2 K(s) + 2 H2O(l) 2 KOH(aq) + H2(g) A 4.85-g chunk of potassium is dropped into 1.06 kg water at 24.0°C.
Determine How much sodium hydroxide (in grams) is required to form 546 mL of solution with a pH of 10.00?
At 0.967 atm, the height of mercury in a barometer is 0.735 m. If the mercury were replaced with water, what height of water (in meters) would be supported at this pressure.
Cadaverine, a fould smelling substance produced by the action of bacteria on meat, contains 58.55% C, 13.81% H and 27.40% N. Its molar mass is 102.2 g/mol.
Consider an ordinary 8 fluid oz. glass of water (H2O). Suppose, hypothetically, that all of the water molecules in the glass could be marked.
Compute the mass of H 2 O formed when 22 grams of propane are burnt if 4.4grams of propane are burnt in excess O2 7.2g of H 2 O are formed.
You are the Science Officer on the Starship Enterprise and you come across a new planet. You find that no light with wavelength less than about 650 nm reaches the surface of the planet.
If a reaction vessel initially contains only co and NH3 at concentrations of 1.00 m and 2.00m , respectively, what will the concentration of HCONH2 be at equilibrium?
What is the pH of the solution which results from mixing 25 mL of 0.30 M HF(aq) and 25 mL of 0.30 M NaOH(aq) at 25 ºC? (Ka of HF = .00072)
A liquid that has a density of 0.80 ± 0.01 g/mL is insoluble in cyclohexane. What is the liquid?
what will the concentration be after 9.00 minutes? Part B A zero-order reaction has a constant rate of 1.30×10^?4 M/s. If after 60.0 seconds the concentration has dropped to 8.00×10^?2 M, what was the initial concentration?
Does a mutation causing a substitution of one base pair in a strand of DNA necessarily result in a new amino acid in the protein coded for that gene? Explain.
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