Please Help 10 Minutes before its due 1) The production of steel from iron involves the removal of many impurities in the iron ore. The following equations show some of the purifying reactions. Calculate the enthalpy (ΔH) for each reaction. __C(s) + __Fe2O3(s) --> __3CO(g) + __2Fe(s) ΔH = ___kJ/mol

2) 3Mn(s) + Fe2O3(s) --> 3MnO(s) + 2Fe(s) ΔH = ___ kJ/mol

3) 12P(s) + 10Fe2O3(s) _--> 3P4O10(s) + 20Fe(s) ΔH = ___kJ/mol

4) 3Si(s) + 2Fe2O3(s) --> 3SiO2(s) + 4Fe(s) ΔH =___ kJ/mol

5) 3S(s) + 2Fe2O3(s) --> 3SO2(g) + 4Fe(s) ΔH = ___ kJ/mol

City a and city b had two different temperatures on a particular day. on that day, four times the temperature of city a was 8â° c more than 3 times the temperature of city b. the temperature of city a minus twice the temperature of city b was â’3â° c. what was the temperature of city a and city b on that day? city a was 5â° c, and city b was 4â° c. city a was 3â° c, and city b was â’1â° c. city a was 8â° c, and city b was â’3â° c. city a was 5â° c, and city b was â’5â° c.

Salicylic acid is a very important acid. it is used to synthesize the aspirin by treating with acetic anhydride. a 0.2015-g sample of salicylic acid was dissolved in a 100.00-ml volumetric flask, and the solution was diluted to the mark. a 10-ml aliquot of this solution was titrated with standard naoh (0.01130 + 0.2% n) to a phenolphthalein faint pink color end point at 19.81 ml. (a) (calculate the normality of the salicylic acid solution used in the titration. (b) assuming the salicylic acid is pure, what is the equivalent weight of the salicylic acid? practice problems for the final exam (continued) (c) (calculate the inherent error in the determination of the equivalent weight you calculated in part (b). use the following absolute errors in the equipment /glassware when calculating the inherent error. 5.00-ml pipet: + 0.02 ml 100-ml volumetric flask: + 0.08 ml analytical balance: + 0.2 mg 25-ml buret: + 0.03 ml

If i can still dissolve more sugar into the solution at a certain temperature what would i call that solution