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The density of niobium is 8.58g/cm3. It's atomic mass is 92.91 g/mol and its structure is bcc. (a) Calculate the lattice parameter and the atomic radius from this information. (b) What is the planar density of atoms in the (110) plane (and sketch how they are arranged).
A container of water is heated from 23.5C to 85.0C. This process requires 21,900 Joules of heat. Calculate the mass of the water. (c=4.184 J/g-C)
Calculate the pH and the concentration of the other species in a 0.0200-M aqueous solution of C6H5COOH (aq)
draw the structures for all the products obtained from the Diels - alders reaction of 2 methyl 1,3 butadiene and propene
upon catalytic hydrogenation unknown Z gives cyclooctane. Oxonolysis of Z followed by reduction with dimethyl sulfide, gives a three0carbon dialdehyde and a five-carbon dialdehyde. Draw the stucture of Z.
If 27.5 mL of 0.1000 M NaOH are required to neutralize 1.22 g of an unknown acid, HA, what is the molecular weight of the unknown acid? NaOH + HA --> NaA + H2O
Indicate whether the potassium acetate salt, CH3CO2K is (A) acidic, (B) basic, (N) neutral
If 32.5 grams of CaO are dissolved in 212 grams of water, what is the concentration of the solution in percent by mass?
What product results from the reaction of hexyl bromide and sodium ethoxide?
Draw a molecular orbital diagram showing the formation of the bond between two hydrogen atoms. Draw all the atomic and molecular orbitals, label them, and show how the electrons fill.
Calculating effective charges on I and Br, The iodine monobromide molecule, IBr, has a bond length of 2.49 Angstroms and a dipole moment of 1.21 D.
Suppose you decide to define your own temperature scale using the freezing point (13 C ) and boiling point (360 C) of oleic acid, the main component of olive oil
Assuming levels of atmospheric CO2 are 390 ppm CO2, what is the pH of rainwater in equilibrium with the atmosphere for the pre-industrial atmospheric CO2 concentration of 280 ppm,v.
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