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For a certain gas that contains only carbon and hydrogen the masspercentage of carbon is known to be 85.62. It is alsoknown that 2.58 g of the gas has a volumeof 1.00 L and a pressure of 0.980 atm at 51.3 oC. What is the molecular formula for the gas ?
Calculate the cell potential for the following reaction that takes place in an electrochemical cell
A saturated solution of unknown metal hydroxide M(OH)2 has a measured pH of 8.91. Determine the value of Ksp for the compound.
What volume of 0.250 M Na3PO4 is required to precipitate all the lead(II) ions from 180.0 mL of 0.550 M Pb(NO3)2
Asteroids are mainly composed of metals like iron and nonmetals like carbon. Briefly explain the differences between metals and nonmetals based on your knowledge of the periodic table.
What is the mechanism for the oxidation of an aldose to an aldonic acid
Electrical conductivity measurements show that 0.050 M acetic acid is 1.9% dissociated at 25* C. Calculate pKa and Ka for acetic acid.
The pH of an aqueous weak acid solution is 6.20 at 25 degree celsius. Calculate the Ka for the acid. The initial concentration of the acid is 0.010M
compare the number of valence electrons in an atom of oxygen, O , with the number of valence electrons in an atom of selenium in the same period or group.
list the names and chemical formulas for two allotropes of oxygen, three allotropes of phosphorus, and four allotropes of carbon
A dilute electrolyte is prepared by dissolving iron(III) chloride in water. It is found to ave a freezing point of - 2.5C. Calculate the molality of the solution
What was his wavelength at his average speed, if he weighed 207 lbs at the time of the race?
A 100.0 mL aliquot of a dibasic compound with Kb1= 1*10^-4 and Kb2 = 1*10^-8 was titrated with 1.00 M HCl and a base concentration of .100 M. Calculate what the pH of the solution would be after 15.0 mL of the acid was added to the 100 mL aliquot ..
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