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assign oxidation numbers to all the elements in each of the following compounds or polyatomic ions: a)N2O b)LiOH c)SbO2^- d)IO4^-
The "roasting" of 48.7 g of ZnS at constant pressure gives off 220. kJ of heat. Calculate the DH for this reaction. 2ZnS(s) + 3O2(g) ® 2ZnO(s) + 2SO2(g)
what products may have been formed during the combustion of the gas?
A 100.0 g sample of a metal M is burned in air to produce 103.7 g of its oxide with the formula M2O. What is the atomic mass of the metal?
A current of 5.64 A is pass through a Ni(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 8.80 g of nickel
A 2.30 L sample of neon at 5.35 atm is added to a 10.0 L cylinder that contains argon. If the pressure in the cylinder is 7.00 atm after the neon is added, what was the original pressure (in atm) of argon in the cylinder?
210 mg Ca(OH)2 and 210 Al(OH)3. A 8.3×10^-2 M HCl, which is similar to stomach acid, is used to neutralize 5.0mL of liquid antacid. How many mililiters of HCl solution are needed to neutralize Ca(OH)2, then Al(OH)3?
How will the melting point of your semicarbazone derivative be affected if the derivative is not dry enough
What is the sum of the stoichiometric coefficients when the reaction is balanced to lowest common denominator
Calculate the number of grams of NaOH per 100ml to give a pH8.0 solution if pure water at pH7.0 is used in the experiment
Please note that NO3 has an odd number of electrons. But you must decide where the missing electron will be. Does the central atom violate the octet rule or do the oxygen atoms? Use formal charges to decide.
As a separation and detection method, would TLC or paper chromatography yield better results in the analysis of each of the following pairs of compounds?
Calculate the mass in grams of copper initially present in the penny based on the concentration of copper in the sample, the total volume of the sample, the dilutions to the original stock, and the molar mass of copper.
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