chemistry help! Please!? I can't solve this. What mass of propane(C 3 H 8) is needed to produce 346 g carbon dioxide in the following reaction? C3H8 (g)+5O2 (g)----> 3CO2 (g)+4H2O (g) A-5075g C3H8 B-115g C3H8 C-1.86g C3H8 D-346g C3H8 If you can please explain it..so that I could solve problems like this in the future. Thank you! !
Step 1: figure out the mole of CO2 346g CO2 ? (1 mole/44.01g CO2 [molar mass, found on period table]) = 7.86 mole CO2 Step 2: do stoichiometry Look at the equation, 1 mole of C3H8 is equal to 3 mole of CO2 7.86 mole CO2 ? (1 mole C3H8/3 mole CO2) = 2.62 mole C3H8 Step 3: convert mole to mass 2.62 mole C3H8 ? (44.03g/ 1 mole) = 115g C3H8 The answer is B