Which statement holds true when the molar mass of hydrogen is 2.0 grams and that of helium is 4.0 grams?

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.

away from the curb

explanation:

the wheels would then hit the curb if it started to rolling, decreasing the chance of an accident.