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**Non-Standard Conditions**

Gas Stoichiometry Non-Standard Conditions

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**Nonstandard Conditions**

Gas volume changes dramatically when pressure or temperature change. Key: The mole-mol calculation must take place at STP.

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**Doing the Calculations**

Given a volume of gas at other than STP? Convert to STP before doing the mole-mole calculation. Finding the volume of gas at other than STP? Do the mole-mole step, then convert the volume to stated conditions

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Problem 1 What volume of chlorine gas measured at 18.5oC and 98.0 kPa can be produced by the electrolysis if 62.3 g of NaCl to give sodium metal and chlorine gas? Answer: L

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Problem 2.00 g of sucrose is combusted in excess oxygen. What is the volume of dry CO2 that is formed at 1 atm pressure and 37oC? MW sucrose = g/mol C12H22O O2 12CO2 + 11H2O A L B L C L D L E L

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Problem 2.00 g of sucrose is combusted in excess oxygen. What is the volume of dry CO2 that is formed at 1 atm pressure and 37oC? MW sucrose = g/mol C12H22O O2 12CO2 + 11H2O A L B L C L D L E L

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Ideal Gas Law (Equation):

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