The balanced equation is CH4 + 2O2 ---> CO2 + 2H2O if 2.57 of O2 gas reacts with excess CH4 gas, how many grams of CO2 gas and H2O gas will be produced?

Question

Chemistry questions 

Answer 1

CH4 + 2O2 ===> CO2 + 2H2O  balanced equation

 

What are the units for 2.47 of O2?  Is that grams or moles?  Assuming it is moles....

 

mole ratio of CO2 to O2 is 1:2 or 1/2 mole CO2 for every 1 mole O2 used

 

2.57 moles O2 x 1 mole CO2/2 moles O2 = 1.285 moles CO2 produced

 

mass of CO2 = 1.285 moles x 44 g/mole = 56.54 g CO2 = 56.5 g (to 3 significant figures)