Simple equation of ethane gas and oxygen

Question

How many grams of water are produced when 100.0 grams of ethane gas burn in the presence of excess oxygen?

i got the equation and balanced it: 2C2H6 (g) 14O2 (g) = 6H2O (l) 4CO2 (g)

my answer was 180 grams and i just wanted to know if it was right

also, what type of reaction is this....single replacement???

Answer 1

2C2H6 +7 O2 >> 4 CO2 + 6 H2O

is the balanced equation

Moles C2H6 = 100.0 g / 30.07 g/mol = 3.33

the ratio between C2H6 and H2O is 2 : 6

moles water = 3.33 x 6 / 2 = 9.99

Mass water = 9.99 mol x 18.02 g/mol = 180 g

this is a redox reaction or a combustion

Answer 2

Your answer is correct although the coefficient for O2 should be 7, not 14. This is a combustion reaction.