Is this right? if not what did i do wrong ?

What are the resulting coefficients when you balance the chemical equation for the combustion of ethane, c2h6? in this reaction, ethane is burned in the presence of oxygen (o2) to form carbon dioxide (co2) and water (h2o). (g)+(g)→(g)+(g)

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?