What is the empirical formula. a compound is used to treat iron deficiency in people. it contains 36.76% iron, 21.11% sulfur, and 42.13% oxygen. the empirical formula is fe s o

FeSO4.

Explanation:

We divide the percentages by the relative atomic masses of the elements:

Iron =  36.76 / 55.845= 0.6583

Sulphur = 21.11 / 32.06 = 0.6584

Oxygen = 42.13 / 15.999 = 2.6333

Simplifying the ratios:

Fe : S : O =

0.6583: 0.6584: 2.6333

= 1 : 1 : 4

The empirical formula is FeSO4.   (Ferrous Sulphate).

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

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)