If the density of a substance is d=2.1g/cm^3 what is the mass of 20.0mL of this substance

Explanation:

density = mass (g)/ volume (cm3)

    2.1 =   mass / 20 cm3

     mass = 42 g

be attention that each 1 ml =1cm3                    

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.

the correct answer is option d

explanation:

i was wrong its d because they dont use cm when calculating square roots