The density of gold is 19.32 g/ml what is the volume of a nugget of gold with a mass of 71.13 g?

3.69 cm³  

Step-by-step explanation:

Density = mass/volume

        D = m/V     Multiply each side by V

      DV = m       Divide each side by D

        V = m/D

Data:

m = 71.13 g

D = 19.3 g/cm³

Calculation:

V = 71.13 g  × (1 cm³/19.3 g)

  = 3.69 cm³

The nugget has a volume of 3.69 cm³.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

the answers would be

the first one and the second one