Why are bacteria necessary for life on Earth to exist? Select three options. Bacteria help produce the oxygen that plants and animals need.
Bacteria help produce some of the foods we eat.
Bacteria put atoms together to form water that plants and animals need.
Bacteria are required for plants and animals to reproduce.
Bacteria decompose rotting plant and animal material.

What can be the use of smoke transformed into liquid?

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

The two naturally occurring isotopes of chlorine are 35cl (34.969 amu, 75.77%) and 37cl (36.966 amu, 24.23%). the two naturally occurring isotopes of bromine are 79br (78.918 rm amu, 50.69%) and 81br (80.916 amu, 49.31%). chlorine and bromine combine to form bromine monochloride, brcl. 1. how many peaks will be present in a mass spectrum for brcl? the four combinations of molecule possible given these four isotopes are: 81br37cl, 81br35cl, 79br37cl, and 79br35cl. 2. what are the masses of the four different brcl molecules? express the masses using six significant figures, in decreasing numeric order (highest to lowest), separated by commas.