Calculate the % impurity in a 0.7 gm of Na2CO3 impure sample that required of O. IN HCI standard solution 30 ml, Atomic mass Na:23,C:12,0:16​

african americans demonstrated their newly found freedom by relocating often in search of relatives whom they had been separated from during slavery. others established schools to educate freed people and they built institutions such as churches and political organizations to advocate for their rights.

it is a solid

explanation:

wher is the rest of the question