Exd 32:30 ¶ And it came to pass on the morrow, that Moses said unto the people, Ye have sinned a great sin: and now I will go up unto the LORD; peradventure I shall make an atonement for your sin. Okay we all know what it take to make atonement for sin...the wages of sin is death
Exd 32:31 And Moses returned unto the LORD, and said, Oh, this people have sinned a great sin, and have made them gods of gold. There we have again, 'this people'

Now, Moses is awesome with speaking what is in his heart and on his mind! But

did not God already tell him verses back in the chapter that the people had corrupted themselves, so why does Moses think God doesn't know what the people have been doing???
Exd 32:7 And the LORD said unto Moses, Go, get thee down; for thy people, which thou broughtest out of the land of Egypt, have corrupted [themselves]: Exd 32:9 And the LORD said unto Moses, I have seen this people, and, behold, it [is] a stiffnecked people: 