The empirical formula for this would be FeS
Answer:

Explanation:
Methanol's molecular weight: 
Methanol's heat of vaporization: 
Ideal gas heat capacity (Cp):
where R is the gas constant

The heat needed to vaporize and bring the gs to 210°C is:


Its D because
Li = 6
Be =9
C= 12
O=15
Answer:
the answer of the questionis D Photons