Moses and Exodus 45

Moses had been at the top of Mt. Sinai for forty days and the people had lost their patience. If Moses could not lead them to the Promised Land, they would make a god who would go before them, at least an image of that god. So they turned to Aaron to make the golden calf out of pure gold. What kind of god did they expect Aaron to make, a pagan god, a new god, or a God they already knew? Why Aaron? And where did all of that gold come from? Oh, and what did they think had happened to Moses?