Answer:
sp²
Explanation:
You need to look at how many electron orbitals around the atom. Looking at the structure below, you can see that there are three electron orbitals. This gives you an sp² hybridization.
The molecular mass of 
is: 1·1 + 1·14.01 + 2·16 = 47.01 g/mol.
Now we can convert the mass into mol of :
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
