Questions 4 and 5 plsss

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)

Which type of reaction always has an element and a compound as reactants

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?