Answer:
4.
You see, 2 atoms of O in the CO₂ and 2 O in the 2 moles of H₂O
Explanation:
CH₄ + 2O₂ → CO₂ + 2H₂O
As the O3 suggests, the Ozone molecule is made up of 3 Oxygen atoms.
Percentage recovery gives us an idea of the amount of pure substance recovered after the chemical reaction. Percentage recovery can be more than 100 % or less than 100 %. Usually, in any experiment performed the weight percentage recovery will be less than 100. Percent recovery values greater than 100 show that the recovered compound is contaminated.
Amount of acetaminophen initially taken = 350 mg
Amount of acetaminophen obtained after recovery =185 mg

= 
= 52.9%
The answer is a. troposphere, stratosphere, mesosphere, ionosphere