Which ion will combine with sulfide in a 2:1 ratio, and why? a). chloride

b). magnesium ion

c). ammonium

d). nitrate

Each pair of clay balls represents to planetesimals if each plane test molluscum pound of the same material and is separated by the same distance which pair experiences the greatest gravitational attraction

What is formed when amino acids form long chains or polymerize

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth