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Question- What is the solubility of oxygen in lake water at 28? Assume that the pKH of oxygen at this temperature is twice that of CO2. Give your answer in mg/L.
If possible just a brief explanation how you got the answer?
Copper and zinc (elements 29 and 30, respectively) appear next to each other on the periodic table. A 5.50 g sample of zinc has a volume of 0.770 mL, while a 5.50 g sample of copper has a volume of 0.616 mL. Why?
Given a solution of .1 M HEPES in its fully protonated form, and ready access to .1M HCl, .1M NaOH, and distilled water. Describe the preparation of 1L of .025 M HEPES buffer solution, pH 7.8?
Assuming that prior experiments have shown the single-step extraction removes only 77% of the ethanol, what is the mass of ethanol in your original unknown. 10.328g mass of ethanol moved by extraction,32.193 g unknown in original solution.
Calculate the heats of combustion for the following reactions from the standard enthalpies of formations listed in appendix 3: (a) 2H2(g) + O2(g) = 2H2O(l) (b) 2C2H2(g) + 5O2(g) = 4CO2(g) + 2H2O(l)
the concentrations are both 0.30 mol L-1. If the temperature stays constant, what is the value of the ratio, Rate(2)/Rate(1)
Combustion of natural gas (primarily methane) occurs in most household heaters. The heat given off in this reaction is used to raise the temperature of the air in the house.
A gas system has initial volume and temperature of 8160mL and 467.0K. If the temperature changes to -151C, what will the resultant volume be in mL
A unknown liquid is insoluble in water and soluble in cyclohexane and alcohol with a boiling point of 110 C What is the substance?
Determine the pressure inside a container of a gas connected to an open-end manometer filled with CCl4, has the density = 1.594 g/cm3,
which reacts with CO2 as per to the equation CaO(s) + CO2(g) CaCO3(s) subsequent to the reaction was complete the pressure of the gas had dropped to 313torr. Explain how many moles of CO2 were in the original mixture. Presume no change in volume o..
Consider an experiment where 35 mL of 0.175 M HOAc is titrated with 0.25 M NaOH. What is the pH at the equivalence point of this titration. The Ka for HOAc is 1.8x10^-5
Pure oxygen gas can be prepared in the laboratory by the decomposition of solid potassium chlorate to form solid potassium chloride and oxygen gas. How much oxygen gas in grams can be prepared from 98.4 of potassium chlorate
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