2C2H6 + 7 O2 ·→ 4 CO2 + 6 H2O Use the above equation, in the following problem:

How many moles of H2O are produced from the combustion of 1.8 moles of C2H6?

5.4moles

Explanation:

from the equation 2 moles of C2H6 will react to give 6 moles of H2O

COMPARING

2 --- 6

1.8--- X moles

cross multiply

you get

X = (6×1.8)/2

= 5.4moles

c, liquids evaporate, creating a gas

2b2t

explanation:

2b2t