Is melting cheese a chemial or physial change

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)

What forms when chemical reactions combine pollution with sunlight?

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution