Answer:
2). If we heat water at 100°c, it will boil.
3). If you leave your job, you cannot travel around the world.
4). If he hadn't fallen asleep while driving, he would not have crashed his car.
5). If we had enough money, we could go to the concert.
Step-by-step explanation:
Conditional sentences are described as the sentences that include a dependent 'if' clause which shows the condition followed by the independent consequential clause. The first sentence follows the rule of 'if + simple present tense + simple future' while the second sentence follows 'if + simple present + simple present(using can).' The third follows the rule 'if + past perfect + perfect conditional' and the last one follows 'if + past simple + present conditional.'