CH4(g) + 2O2(g) ==> CO2(g) + 2H2O(l) (you wrote CH2 but meant CH4)

1). How many moles of CO2 are produced for each mole of CH4 that is used up?

1 mol CH4 x 1 mol CO2 / mol CH4 = 1 mole CO2

2). What concentration of CH4 is used up after 10 minutes?

Initial [CH4] = 0.05 M

After 10 min, [CH4] = 0.03 M

[CH4] used up after 10 min = 0.05 - 0.03 = 0.02 M

3). What is the concentration of carbon dioxide after 20 minutes?

[CH4] used up after 20 min = 0.05 - 0.02 = 0.03 M

[CO2] after 20 min = 0.03 M

4). Write an equation for reaction rate in terms of [CO2].

rate = ∆[CO2] / ∆t

Elle B.

thanks! you're awesome!10d