Situational because he is expressing his feeling on a situation
The balanced chemical reaction would be written as follows:
2Mg + O2 = 2MgO
We are given the amount magnesium to be used in the reaction. This will be the starting point for the calculations. We do as follows:
15.0 g ( 1 mol / 24.31 g ) (2 mol MgO / 2 mol Mg ) (40.31 g / mol ) = 24.87 g MgO formed
Significantly lower as water is a greenhouse gas and traps heat within the atmosphere.
B. Nonessential. Commas are used to set off nonessential (or nonrestrictive) subordinate clauses in sentences. These clauses are not necessary to the basic meaning of the sentence. The nonessential subordinate clause could be omitted from the sentence without changing the meaning of the sentence.