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232 Chapter Five Gases 132. Nitric acidisproduced commercially bytheOstwald process. In thefirst step ammonia isoxidized tonitric oxide: 4NH 3 (g) + 50ig) ---+ 4NO(g) + 6H 2 0(g) Assume this reaction iscarried out inthe apparatus diagramed below. 2.00LNH3 0.500 atm 1.00 LO 2 1.50 atm Thestopcock between thetworeaction containers is opened, and the reaction proceeds using proper catalysts. Calculate the par- tialpressure ofNO afterthereaction iscomplete. Assume 100% yield forthereaction, assume thefinalcontainer volume is3.00 L,and assume the temperature isconstant. 133. A compound contains only.C, H, and N. It is 58.51% C and 7.37% H by mass. Helium effuses through aporous frit 3.20 times asfastasthecompound does. Determine theempirical and molecular formulas ofthis compound. 134. Oneofthechemical controversies ofthenineteenth century con- cerned theelement beryllium (Be). Berzelius originally claimed that beryllium was atrivalent element (forming Be 3 + ions) and that itgave anoxide with theformula Be 2 0 3 . This resulted ina calculated atomic mass of13.5forberyllium. Informulating his
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