AP Chapter 5

# A 256 ml flask at 100c and 750 torr contains 80 g of

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Unformatted text preview: g of the gaseous compound. What is the molecular formula? Gases and Stoichiometry Reactions happen in moles At Standard Temperature and Pressure (STP, 0C and 1 atm) 1 mole of gas occupies 22.42 L. If not at STP, use the ideal gas law to calculate moles of reactant or volume of product. 25 26 Examples Mercury can be achieved by the following reaction heat HgO Hg(l) + O 2 (g) What volume of oxygen gas can be produced from 4.10 g of mercury (II) oxide at STP? At 400.C and 740 torr? Using the following reaction NaHCO 3 (s) + HCl NaCl(aq) + CO 2 (g) +H 2 O(l) calculate the mass of sodium hydrogen carbonate necessary to produce 2.87 L of carbon dioxide at 25C and 2.00 atm. If 27 L of gas are produced at 26C and 745 torr when 2.6 L of HCl are added what is the concentration of HCl? 28 Examples 27 Examples Consider the following reaction 4NH 3 (g) + 5 O 2 ( g ) 4 NO(g) + 6H 2 O(g) What volume of NO at 1.0 atm and 1000C can be produced from 10.0 L of NH3 and excess O2 at the same temperature and pressure? What volume of O2 measured at STP will be consumed when 10.0 kg NH3 is reacted? 29 30 Examples 4NH3(g) + 5 O2(g) 4 NO(g)+ 6H2O(g) What mass of H2O will be produced from 65.0 L of O2 and 75.0 L of NH3 both measured at STP? What volume Of...
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