# you are a nation ... has chosen you

"we are a nation ... has chosen us"

# For you are a nation ... surface of the earth

See how you translated these words in Deuteronomy 7:6.

# you are a nation that is set apart to Yahweh your God

"Yahweh your God has set you apart from other nations" 

# Yahweh has chosen you to be a people for his own possession

This means that the people of Israel belong to Yahweh in a special way. 

# a people for his own possession

"a people for his treasured possession" or "his people"

# more than all peoples that are on the surface of the earth

"out of all the people groups in the world"