<span>the rapid expansion of matter from a state of extremely high density and temperature that according to current cosmological theories marked the origin of the universe.</span>
Answer:
D
Explanation:
i took the test and got it right :)
1. Subscript is below
2. Coefficient large 2 indicates the number of moles
3. Atoms
1/2 O2 + H2 —> H2O
It’s the atoms that balance on each side
Notes that 1/2 is the coefficient and 2 is the subscript in H2 and H2O
Sodium chloride because it contains the most reactive metal(sodium) and most reactive non-metal(chlorine).
Water. All organisms that depend on oxygen need water to live.
