Intercession with power

Exodus 32.14
"then the gentleman calmed down and gave up on doing to his people the damage that had seized him"

Can prayer change the mind of God?

God was angry with the disobedience, corruption and rebellion of his people and spoke to a man named Moses of his intention to destroy them, however, Moses sought the favor of God and begged him to deliver the same people he had miraculously removed Of Egipt
In Exodus 32:14 we read that the Lord "gave up", which means that He decided not to do what He had planned

Can a man with his intercession change the mind of God?

The Bible constantly tells us about the power of intercession, the power is not in us as human beings, of course, or in the order or frequency of the words we speak, the power comes only from God, from the one who listens to us, the apostol santiago says: the oration of the just is powerful and effective "(santiago 5:16)

Source

Intercession has power when it is based on the promises of God, can pray for another person, but if what you are asking is not compatible with your promises or contradicts them, your prayers will not be effective, when your prayers for other people are in agreement with the word of God, he will answer, this is another good reason to read the Bible every day
We must base our prayers on the truth of the Word of God, as well as Moses, we can also pray with his word, reminding God of what he has promised.