Answer:
CH₄ + 2O₂ → 2H₂O + CO₂
Explanation:
From the given problem;
White balls = hydrogen
Black balls = carbon
Gray balls = oxygen
Equation of the reaction:
1 carbon atom surrounded by 4 hydrogen + 2 oxygen molecules gives two hydrogen atoms bonded to one oxygen + 1 carbon atom bonded to two oxygen
CH₄ + 2O₂ → 2H₂O + CO₂
The reaction above is balanced.
Answer:
iii) Increasing atmospheric concentrations of carbon dioxide could alter Earth's climate
Explanation:
Increased concentration of carbon dioxide traps heat in the earth or insulate the Earth leading to increase in temperature of the Earth. Example of the effect is retreating polar ice caps as a result of melting. Having an understanding of the release and absorption of carbon dioxide, one of the green house gases, is important to predict global warming trends and understand the climate. Other examples of green houses gas include water vapor, methane, CFC, nitrous oxide and others
