posted by Randy on .
What volume of carbon monoxide gas (at STP) is needed when 1.35 Moles of oxygen gas react completely in the following equation. 2CO + O2 > 2CO2 please show your work I'm having trouble with Gas Stoichiometry.
The steps you go through to solve stoichiometry problems.
1. Convert everything to mols.
2. Use the coefficients in the balanced equation to convert what you have to what you want.
3. Convert mols of what you want to other units (grams, liters, kg, etc).
For this problem. We already have mols so you can skip #1.
#2. Use the coefficients in the balanced equation to convert mols O2 (what we have) to mols CO (what we want).
1.35 mol O2 x (2 mol CO/1 mol O2) = 1.35 mol O2 x (2/1) = 2.70 mol O2 needed.
3. Convert 2.70 mol O2 to volume.
2.70 mol x (22.4 L/mol) = 60.48 which rounds to 60.5 L CO needed.