An object has a density of 20.00 g/ml .if the object has volume of 50.00 g/ml ,what is its mass?

1000. g

Explanation:

Assuming that you mean the volume is 50.00mL, you use the density as a unit converter to find the grams.

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.

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.