Answer:
His experiment has very low precision
Explanation:
Precision is how close the answers are together. The answers are increasing in time. So, this makes sence. None of the answers are similar to one another.
Why don’t you just use google?
Answer:

Explanation:
Molecular Formula is representation of the chemical compound in terms of the symbols of all the elements that are present in the compound followed by subscripts, which give the count of each element in that compound.
We need to write the molecular formula of Tricarbon nonachloride. Tri means three, so Tricarbon means there are 3 atoms of Carbon. Likewise, nona stands for 9, so nonachloride means there are 9 atoms of chlorine. Therefore, we can represent nonachloride as:
Carbon (3 atoms) Chlorine (9 atoms) = 
Thus, molecular formula of Tricarbon nonachloride is 
I need points sorry I’m doing a test
Answer:
The answer is grass
Explanation:
Grass is a plant, meaning it undergoes photosynthesis to receive its energy from the sun.