Help please:) brainliest will be given

Iron reacts with oxygen to produce iron oxide (rust). this reaction is represented in an equation as 4fe + xo2 → 2fe2o3. identify the value of x that will balance the equation.

Which of the following best describes the relationship between glucose and complex molecules such as hormones?

Which term describes a normal value for something in the body? a.homeostasis b.set point c.feedback loop d.integration center