What would be the formula for ethane?

Apure solvent has a vapor pressure the vapor pressure of a solution. a. equal to b. lower than c. higher than

If blood contains 150g of hemoglobin per liter of blood, how much hemoglobin would be contained in 10 ml of blood

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?