7 A sample of 16.0g of a metal oxide, MO, is reduced to 12.8g of the metal, M.
What is the relative atomic mass, Ar, of M?
A 32
B 64
C 80
D 128

hope this

explanation:

covalent bonds

consist of pairs of electrons shared by two atoms, and bind the atoms to fixed orientation and requre high energies to break them

ionic bonds

when two atoms differ considerably in their electronegativity, then one of the atoms will lose its electron to the other atom. this results in a positively charged ion(cation) and a negatively charged ion (anion)

i'm assuming that the correct answer is indeed the first one/ "a"..

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >