Respostas

2014-03-05T17:19:02-03:00
D=m/v
v=m/d
v= 800 X 2,1
v= 1680 ml
2014-03-05T17:20:45-03:00
 D = \frac{M}{V}

D = 2,1
M = 800 
V = ?

2,1 =  \frac{800}{V}
V = 1680 ml