Final answer:
The chosen covenant is the Covenant between God and the Hebrews, also known as the Mosaic Covenant. The mediator is Moses and God promises the Hebrews a land of abundance and peace, Israel. This covenant connects to salvation history as it sets the conditions for the Hebrews' prosperity in the promised land.
Step-by-step explanation:
The chosen covenant is the Covenant between God and the Hebrews, which is also known as the Mosaic Covenant. The mediator of this covenant is the prophet Moses. Through this covenant, God promises the Hebrews a land of abundance and peace, which is Israel. This covenant connects to salvation history because it establishes the exclusive worship of Yahweh, the Hebrews' monotheistic faith, and the obedience to God's laws as the conditions for their prosperity in the promised land.