me!! asked in Science & MathematicsChemistry · 10 years ago

Chemistry homework on moles and STP!!?

For the reaction:

2HCl + Na2CO3---> 2NaCl + H2O + CO2

179.2 liters of CO2 is collected at STP. How many moles of NaCL are also formed?

1. 4.0moles

2. 32.0moles

3. 16.0moles

4. 6.0moles

5. 12.5moles

6. 8.0 moles

any help would be greatly appreciated :)

3 Answers

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  • Lexi R
    Lv 7
    10 years ago
    Favorite Answer

    At STP (standard temperature and Pressure (0 deg Celcius and 1 atm) 1 mole of any ideal gas occupies a volume of 22.4 L

    So moles gas at STP = volume / 22.4 L/mol

    moles CO2 = 179.2 L / 22.4 L/mol

    = 8.00 mol

    The coefficients in the balanced equation show that

    2 moles NaCl forms along with 1 mole CO2

    So moles NaCl = 2 x moles CO2

    = 16.0 mol

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    4 years ago

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  • erl
    Lv 4
    4 years ago

    First, in case you desire to transform liters to moles, you need to divide by 22.4, not multiply. then to transform the moles to grams, you need to divide that extensive form by the molar mass.

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