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 :)

Relevance
• Lexi R
Lv 7
10 years ago

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.