Part A: What mass of carbon dioxide is produced from the complete combustion of 2.60×10−3 g of methane? Express your answer with the appropriate units.

Part B: What mass of water is produced from the complete combustion of 2.60×10−3 g of methane?
Express your answer with the appropriate units.

Part C: What mass of oxygen is needed for the complete combustion of 2.60×10−3 g of methane?
Express your answer with the appropriate units.

1 Answer
Feb 17, 2018

We address the stoichiometric equation...

#CH_4(g) + 2O_2(g) rarr CO_2(g) + 2H_2O(l) + Delta#

Explanation:

...the which represents the complete combustion of methane...

We combust a mass of #2.60*mg# of methane with respect to methane...a molar quantity of...

#(2.60xx10^-3*g)/(16.04*g*mol^-1)=1.62xx10^-4*mol#...

...and thus we get TWICE this molar quantity of water....i.e. a mass of...#2xx1.62xx10^-4*molxx18.01*g*mol^-1=5.84*mg#.

And if we combust a molar quantity of #1.62xx10^-4*mol#, the equation dicates that we combust TWICE this molar quantity of dioxygen....a mass of....

#2xx1.62xx10^-4*molxx32.00*g*mol^-1=0.0104*g#..