You should research the discoveries of Ron Wyatt -- they would answer many of your questions about Exodus and much more that come from the Bible. Also, search for "ark of the covenant" and you will read about how Ron actually found the ark -- directly under the "cross hole" that held the cross of Jesus! Why was this? God demands that all things be done right. The blood of the Jewish sacrifice had to be sprinkled on the ark. There is a crack in the rock inside the cross hole. It permitted the blood of Jesus to run down and be sprinkled on the ark. Oh, and there is human blood residue on the stone cover of the ark. When analyzed it was found to contain only 24 chromosomes, not the usual 46. Why? Jesus' virgin birth. Mary supplied 23, and God supplied one single y chromosome to make the male child. Interesting, huh?
Len Lisenbee