would the temperature of the earth be warmer or colder on average if C02 were not present in our atmosphere?

Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !