Answer:
1000. g
Explanation:
Assuming that you mean the volume is 50.00mL, you use the density as a unit converter to find the grams.
[tex]50.00mL*\frac{20.00g}{1mL} = 1000.0000g[/tex]
Round to the lowest number of significant figures which is 4 to get 1000. g.
Another way to show the significant figures is 1.000 x 10³ g.