Balance the chemical equation : CH₄ + O₂ → CO₂ + H₂O

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)

According to each substances heat of fusion, which of the items below requires more heat to be added per gram of substance to go from solid to liquid? silver sulfur water lead

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?