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Suppose you have a sample which should melt at 100-101 degree C. You place 0.015 grams in a capillary tube in an oil bath at 101 degree C. If the heat of fussion for the sample is 50 cal/gram, how long will it take for the sample to melt if the glass capillary tube allows 2.25 calories/minute to pass from oil bath to the sample?
What is the cell potential at 25 degrees C for the following galvanic cell? Pb (s) | Pb^2+ (1.0M) || Cu^2+ (1.2x10^-4 M) | Cu (s). If the Pb^2+ concentration is maintained at 1.0 M, what is the Cu^2+ concentration when the cell potential drops to ze..
what mass of Fe (OH)3 would be produced by reacting 75.0 mL of a 0.0815M Fe( NO3)3 solution with 125 mL of a 0.150 M NaOH solution
The side rection most often encountered in diels-alder syntheses is dimerization, in which the diene also acts as a dienophile. For example, butadiene can react with itself to yield 4-vinylcyclohexene . Draw the structures of four possible Diels-a..
The specific heat of the brick is 0.85 J/g-K. How many bricks must be incorporated into the interior of the house to provide the same total heat capacity as 1.1 103 gal of water
A certain complex of metal M is formulated as MCl3*3H20. The coordination number of the complex is not known, but is expected to be 4 or 6. would reaction of the complex with AgNO3(aq) provide information about the coordination number?
The normal freezing point of water is 0.0C. at this temperature the density of liquid water is 1.000 g/ml and the density of ice is 0.917 g/ml. The increase in enthalpy for the melting of ice at this temperature is 6010 J/mol.
NaCl is an electrolyte that commonly used to melt ice by lowering its melting point. what is the lowest possible melting point for ice that could be obtained considering the solubility of NaCl in water? The Kf for H2O is 1-86 degree C/m.
Vanillin is an organic compound containing C,H and O. Combustion of 1.05g of vanillin produces 2.43g CO2 and 0.50 of H2O. The Molar mass of vanillin is 152.16g/mol. What is the molecular formula for vanillin
potassiumm chlorate (KClO3) decomposes to form potassium chloride and oxygen gas. if 5.4 moles of potassium chlorate decompose, how many moles of oxygen could be produce.
3-ethylbenzoic acid Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all hydrogen atoms. Draw a benzene ring with alternating single and double bonds between the carbon atoms
how many moles of HNO3 are present in 33.0 mL of a 4.70M solution ?
Mercury is a toxic heavy metal which is liquid at room temperature. To form HgBr2, mercury(II) bromide, a student reacts elemental bromine with elemental mercury
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