Question

help me please answer asap
Methane reacts with oxygen to produce carbon dioxide and water. What are the products?














A.

methane and water











B.

oxygen and carbon dioxide











C.

methane and oxygen











D.

carbon dioxide and water

Answer 1

1.
a) convert grams to moles: 1.3*10^-3 g (MW= 16.042g/mole) so 8.1x10^-5 moles
b) mole ratio of CH4 to CO2 is 1:1 so for every 1 mole of CH4 burned, 1 mole CO2 is produced. therefore 8.1x10^-5 moles of CO2 is produced, converting to grams you get : .00357g CO2

2. mole ratio CH4 to H2O is 1:2 so for every 1 mole CH4 burned, 2 moles of H20 are produced. therefore 1.62x10^-4 moles of water are produced, converting to grams you get .0029 g water

3. mole ratio CH4 to O2 is 1:2 so for every 1 mole of CH4, 2 moles of O2 are needed to burn the CH4. therefore 1.62x10^-4 moles of O2 are used which is .00519g of O2.

you could also do number 3 by adding the grams produced (.00357g CO2 +.0029g water= ..00647g) and subtracting the grams of CH4 consumed (.0013g) to get .00518g, which must have come from the O2.

Answer 2

so is it A or B