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A sample of an unknowk gas effuses in 11.6 min. An equal volume of H2 in the same apparatus under the same conditions effuses in 2.42 min. what is the molar mass of the unkown gas
What is the maximum amount of P2O5 that can theoretically be made from 186 g P4 and excess oxygen?
A solution of hydroiodic acid is 0.057 M HI. What is the hydronium-ion concentraion at 25 degrees C?
Which of the following terms would be used in a description of the mechanism of this reaction? tertiary carbanion, 2-methylpentoxonium ion, sp hybridized pentyne, vicinal dihydroxide, or hydroxide ion.
Properties of subatomic particles - Fill in the missing relative masses and relative charges for each of the subatomic particles
If 5 mL of the original unknown sample was diluted to 200 mL prior to analysis, what is the concentration of Li+ in the original solution?
How many moles of carbon, hydrogen, & oxygen are present in a 100g sample of ascorbic acid? Ascorbic acid (vitamin C) contains 40.92% carbon, 4.58% hydrogen, and 54.50% oxygen by mass. Assume a 100 g sample of ascorbic acid.
What is the pH of the benzoic acid solution prior to adding sodium benzoate? Express answer using 3 significant figures. 2. How many grams of sodium benzoate should be added to prepare the buffer?
Write and balance the given chemical equation and Write a balanced equation for this reaction
What is the de Broglie wavelength (in meters) of a mosquito weighing 1.50 mg and flying at 1.34 m/s?
the meta and para forms of phenylene diamine are used in the production of Kevlar and Nomex, respectively. Why is a corresponding material with similar properties not made from ortho-phynelene diamine
What is the pH of the solution? The K of hypochlorous acid is 3.8*10-8. Please explain how to get this using the Henderson-Hassalbach Equation.
Under identical conditions, seperate samples of O2 and an unknown gas were allowed to effuse through identical membranes simultaneously.
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