2The higher the numbers on the NFPA diamond, the more the substance is. ARare incorrect answer
BDangerous incorrect answer
CPure incorrect answer
DSafe

The correct answer is B. Dangerous

Explanation:

The NFPA diamond is used to show how safe or dangerous a substance or material is based on four main categories: Health (blue), Flammability (red), Instability (yellow), special hazards (white). Moreover, the three first hazards are expressed using numbers from 0 to 4, in which 0 means no hazard while 4 is the most dangerous category. For example, in the health square finding 0 means the substance represents no hazard for health, while 4 means the substance is lethal. This means the higher the number in this diamond, the most dangerous the substance is.

b i think it’s a water wheel turning in a stream

fe 55.85 g/mol and h2o 18.02 g/mol.