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Polonium crystals have a simple cubic unit cell. If the edge length of a unit cell is 310. pm, what is the radius a polonium atom?
Identify the sets of quantum numbers that describe all the electrons in a neutral beryllium atom, \rm Be. Each set is ordered
a solution is made up by dissolving 73 g of glucose in 966 g of water. calculate the activity coefficient of glucose in
What volume of hydrogen gas, in liters, is produced by the reaction of 4.17g of iron metal with 60.0 mL of 3.00M HCl?
1 calculate the volume of 0.150 m naoh titrant added to 50.00 ml of a 0.0100 m hcl analyte solution to produce a ph of
A solution of a weak acid was tested with the indicators used in this experiment. The colors observed were as follows
If the volume is increased to 68.0 at constant temperature, how many collisions will occur per square inch of this larger container. Enter the number of collisions per square inch.
Write a detailed mechanism for the reaction of salicylic acid with acetic anhydride, showing clearly the function of the catalyst, sulfuric acid.
A 50 mL soln. of Mg(NO3)2 is mixed with a 50 mL solution of NaOH. The resulting precipitate, Mg(OH)2, that forms is 2.97g. Determine the concentration of solution of Mg(NO3)2
Calculate the standard reaction enthalpy for the reaction above (as written) using the following data: N2(g) + O2(g) -→ 2 NO(g)
why is the internal-standard method often used in plasma emission
Fe2O3 + 3CO------2Fe + 3Co2 suppose that 1.14x 10^3kg of Fe is obtained from 1.82x 10^3 kg of samples Fe2O3. Assuming that the reaction goes to completion. What is % purity of Fe2O3 in orginal sample
The steam is comes out of the feed water at 200 C. The water at a flow rate of 500 kg/h enters the feed water heater at 20C. Calculate the feed water exit temperature.
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