H electronegativity: 2.2
• H valence electrons: 1
• C electronegativity: 2.55
• C valence electrons: 4
• O electronegativity: 3.44
• O valence electrons: 6
Chemical weathering over hundreds of thousands of years formed modern caves. One form of chemical weathering occurs when carbon dioxide reacts with water to produce carbonic acid, H2COz. How many bonds formed in H,COz?
A. 3
B. 8
C. 6
D. 5
In carbonic acid (H2CO3), there are two hydrogen atoms (H), one carbon atom (C), and three oxygen atoms (O).
To determine the number of bonds formed in H2CO3, we need to consider the valence electrons and the octet rule.
Each hydrogen atom (H) has 1 valence electron, while each carbon atom (C) has 4 valence electrons, and each oxygen atom (O) has 6 valence electrons.
Hydrogen (H) typically forms 1 bond.
Carbon (C) typically forms 4 bonds.
Oxygen (O) typically forms 2 bonds.
Since there are 2 hydrogen atoms (H) in H2CO3, they will form 2 bonds in total.
The carbon atom (C) needs to form 4 bonds to satisfy the octet rule. It has 4 valence electrons available for bonding. Therefore, the carbon atom (C) will form 4 bonds.
The three oxygen atoms (O) each need to form 2 bonds to satisfy the octet rule. Each oxygen atom (O) has 6 valence electrons available for bonding. Therefore, the three oxygen atoms (O) will form a total of 6 bonds (2 bonds each).
Adding up the number of bonds formed by each atom, we get:
2 (bonds formed by hydrogen) + 4 (bonds formed by carbon) + 6 (bonds formed by oxygen) = 12.
Therefore, the correct answer is not listed. The number of bonds formed in H2CO3 is 12.