What do we mean by terms: a. experiment b. loboratoty c. chemistry

What does the process of natural selection involve

How many liters of oxygen gas, at standard temperature and pressure, will react with 35.8 grams of iron metal? 4 fe (s) + 3 o₂ (g) → 2 fe₂o₃ (s)

Which scientists contributed to the determination of how cfcs in clouds in the upper atmosphere could destroy ozone molecules