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How acidic character varies in s block elements
Derive the expression for the energy of a molecule, Consider the system of a gas adsorbed onto a surface. The gas can be treated as a two-dimensional ideal gas
A Cu/Cu2+ concentration cell has a voltage of 0.21V at 25 °C. The concentration of Cu2+ in one of the half-cells is 1.4×10-3M . What is the concentration of Cu2+ in the other half-cell?
A solution consisting of .200 mol of methylbenzene (C6H5CH3) in 250 g of nitrobenzene (C6H5NO2)freezes at .40 degrees celsius
Problem- Discuss why the 2,4-Dinitrophenylhydrazone derivative of 2-butanone probably cannot be identified by melting point analysis. What problem is anticipated
A certain liqid boils at 42.0 C. Its standard entropy of vaporization, at that temperature is 89.4 J K -1mol -1 Calculate the standard enthalpy of vaporization.
A chemistry student needs to weigh out exactly 1.19 mol of Mg(HCO3)2 to perform a laboratory experiment. How many grams should he weigh out?
How many moles of NaCl2 can be formed in the reaction of 5.00 mol of Ni and 10.0 mol of HCl
Problem- 14.0 moles of gas are in a 5.00L tank at 20.0?C . Calculate the difference in pressure between methane and an ideal gas under these conditions. The van der Waals constants for methane are a=2.300L2? atm/mol2 and b=0.0430 L/mol.
What is the [H3O+] in a buffer that consists of 0.30 M HCOOH and 0.20 M HCOONa? Ka=1.7x10^-4
Fish produce glycerol to survive the freezing waters of the Arctic. Determine the degree to which the freezing point of blood and other biological fluids is lowered with the help of glycerol. What is the ideal concentration range of glycerol requi..
Are there any other particular ones more important or can some of them actually have a harmful effect on the human body.
If 20.0 dm3 of methane, CH4, react with 200.0 dm3 of air at STP, calculate the dm3 of carbon dioxide gas produced.
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