Gas Stoichiometry

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Gas Stoichiometry
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STP standard temperature and pressure T 0o C
273 K, P 1 atm at STP the volume of 1 mole of
gas 22.42 L (22.42 L/mole) Ex - Find the
number of moles of 2.0 L of CO2 at STP.
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Ex - The industrial synthesis of nitric acid
involves the reaction 3 NO2(g) H2O(l) --gt 2
HNO3(aq) NO(g) If 450. L of NO2 at 5.00 atm
and 295 K react, how many moles of nitric acid
are formed?
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(No Transcript)
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Ex - What is the density of CO2 gas at 745 mm Hg
and 65oC?
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Dalton's Law of Partial Pressures PT P1 P2
P3 .... Mole Fraction (X) n1/ntotal it also
equals P1/PT
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If a gas is collected over water, the evaporated
water contributes to the total pressure. To
correct for this, subtract the vapor pressure of
water from the total pressure of the collected
gas.
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A student prepares a sample of hydrogen gas by
electrolyzing water at 25oC. She collects 152 mL
of H2 at a total pressure of 758 mm Hg. Given
that the vapor pressure of water at 25oC is 23.76
mm Hg, calculate a. the partial pressure of
hydrogen b. the number of moles of hydrogen
collected
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