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Explain what is the magnitude of the partial positive and partial negative charges in the HBr molecule? (1D=3.36x10-30 C m; 1e = 1.6022x10-19 C; bond length HBr= 1.41 angstroms; Dipole Moment HBr= 0.82D)
Gallium crystallizes in a primitive cubic unit cell. The length of an edge of this cube is 362 pm . What is the radius of a gallium atom
Hydrogen atoms that are bonded to an sp3 hybridized carbon atom normally appear between 0.9 & 1.8 ppm and are said to be shielded
what mass of solid sodium formate (of mw 68.01) must be added to 105 ml of 0.55 mol/l formic acid(HCOOH) to make a buffer solution having a ph of 3.96? ka=0.00018 for HCOOH
a sample of beach sand contains sand particles of different colors small pebbles and also shells. each component
polyethylene can be chlorinated by inducing a random substitution of chlorine atoms for hydrogen. what is the
Suppose a reversible heat pump transfers heat from the outdoors at 0 degrees C to a room at 20 degrees Celsius. For each Joule of work input to the heat pump, how much heat will be deposited in the room?
The solubility of a compound is 59g per 100ml of boiling methanol and 30g per 100ml of cold methanol, whereas its solubility in water is 7.2g per 100ml at 95°C and 0.22g per 100ml at 2°C. Which solvent would be better for the recrystallization of ..
you are given a fixed quantity of h2o gas with p 35 mp a and t 450c. find the specific volume using both a the ig
In what volume ratio should you mix 1.0M solutions of NH4Cl andNH3 to produce a buffer solution having pH = 9.80
a sample of vinegar of 50 ml and density of sample 1.06 gml was diluted to 500 millilitres. titration of a 50 ml of
What is the solubility of MnS, in grams per liter, in a buffer solution that is 0.115M HC2H3O2
54g of a certain metal at 98 degree Celsius was placed into 80ml of water at 297K. Assuming no heat is lost to the surrounding, what is the temperature of the water and the metal
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