Answer:
The 3rd one is right bc 600 200 600 is ur answer to X and Y...
Explanation:
The molecular formula:


The molecular formula is N₂O₄.
Answer:
B. Tell the instructor
Explanation:
Always to the instructor about any accidents happens in a lab.
Answer:
True.
Explanation:
Iodine is an essential element required for the synthesis of Thyroxine is a correct statement.
Iodine is an essential and controlling medium for thyroid hormone production, as a minor ingredient. It is an important element in the development of thyroid hormones thyroxine (T4) and triiodothyronine (T3) by the thyroid gland.
I think is it the flask the bottle cause i had the same thing and i got it right idk maybe :)