Answer:
I say the correct answers are primary and secondary and teriary.
Explanation:
I say you are right!!
Explanation:
Charges on both magnesium and oxygen is 2. Though opposite in sign, they have equal charges so, both of them will be cancelled by each other.
As a result, formula of magnesium oxide is MgO and not
.
The student write the equation as
, it is not correct.
Therefore, given equation will be balanced as follows.

Since, number of atoms on both reactant and product side are equal. Hence, this equation is completely balanced.
Adaptation actually and also following control measures on how to avoid it from happening
Answer:
Without corals, the algae are not protected and cannot perform photosynthesis.
Fireworks changes chemical energy into light energy