Which two is it brainliest and 100points

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)

Explain why scientists use shared characteristics to make cladograms.

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?