An unknown compound has the following chemical formula:
p_2o_x
where x stands for a whole number.
measurements also show that a certain sample of the unknown compound contains 8.20 mol of oxygen and 3.3mol of phosphorus.
write the complete chemical formula for the unknown compound.

Formula of the compound =

Explanation:

Given,

No. of mole of O = 8.20 mol

No. of mole of P = 3.30 mol

Chemical formula =

Ratio of P and O =

formula of the compound =

93.2 ml + 3920 ml = 4013 ml total  

(93.2 ml) * (2.03 m) / (4013 ml) = 0.0471 m

the volume in in l of the diluted solution would be 0.0471 m.

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3