Why is the ozone layer vital to life on Earth? A) It causes clouds to
be created
B) It shields the Earth
from ultraviolet (UV)
rays from the sun C) It is made up of oxygen
D) Planes fly in the
ozone layer

Magnesium is the limiting reactant in this experiment. calculate the theoretical yield of mgo for each trial. trial 1: trial 2: data mass of empty crucible with lid trial 1: 26.688 trial 2: 26.681 mass of mg metal, crucible, and lid trial 1: 26.994 trial: 2 26.985 mass of mgo, crucible, and lid trial 1: 27.188 trial 2: 27.180