Please describe why is it important to use proper scientific notation when doing calculations?

there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

hope this

1 a

2 d

3 a

4 c

explanation:

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

the awnser is group 12