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- 9.52 Write the formation reaction for each of the following substances. (a) CH4(g) , (b) C3H(l) , (c) HCI(g), (d) C6H12O6(s) , (e) NaF(s)Joseph Priestly prepared oxygen in 1774 by heating red mercury(II) oxide with sunlight focused through a lens. How much heat is required to decompose exactly 1 mole of red HgO(s) to Hg(l) and O2(g) under standard conditions?Gold is produced electrochemically from an aqueous solution of Au(CN)2 containing an excess of CN. Gold metal and oxygen gas are produced at the electrodes. What amount (moles) of O2 will be produced during the production of 1.00 mole of gold?
- Carbon forms a number of allotropes, two of which are graphite and diamond. Silicon has a diamond structure. Why is there of allotrope of silicon with a graphite structure?9.56 Using heats of formation tabulated in Appendix E, calculate the heats of reaction for the following. (a) C2H2(g)+52O2(g)2CO2(g)+H2O(l) (b) PCl3(g)+Cl2(g)PCl5(g) (c) C2H4(g)+H2O(g)C2H5OH(g) (d) Fe2O3(s)+2Al(s)Al2O3(s)+2Fe(l)The total amount Wunderhor Germany together and the us of enersy OF I mole (5. equal to a.) 18.01smol b.) the enthalpy of Formation C.) the themal comporents or the substanca d.) The tuctric enersy どりThe sum of the libvational erer)y, ro th tiohel ereisy, transitional elect onic enuray eversy ind mee wenery
- 25. Write reasonable mechanisms for each of the following transformations.N Gve the structure of the mayor produc CrO, HSO HO- OH PCC 2. CH;Ch HBr, ROOR Ph AICCalculate the number of photons in 10° L of radiation in a thermal equilibrium at 500 K. (A) 2.52 x 10 photons (B) 2.52 x 100 photons (C) 4.34x105 photons (D) 4.34x1020 photons
- hyrw 2o nsn hyapsn sem St.) Calcium oxide is sometimes very challenging to etare n the Oumistry labrortory.This compound reacts with moisture in the air and is converted to calcium hydcokide. If a bottle of calcium oxide i8 left on the ehelf too long, it grodually absorbs moisture from the humidity in the laboratory. Eventually th bottle cracks and spills the colcium hydrokide that hus been produced. WrHhe the unbalancaed chemical equaher for this process. 33.) The clement tin often occurs in nature as the oxide, Sn b produce pure tin metal from this sort of tin oe, the ore Gtmol rom the usually is heated with coal Carbon) This produies pureBr CN HO H3CO EtO2C HO ? CO2EtD NHEDPEN mnoxide ract Wth OxyGeN to produce NHrogw dioxide %3D Calculate the en thalpy Change uher 12,759 ON tO is convoted Completely 12.759 of NO to NOa