Sodium metal reacts with fluorine gas (F₂) to form sodium fluoride. Determine the empirical formula of sodium fluoride, given that 2.50 g of Na completely reacts with 2.07 g of F₂.

Select the correct empirical formula for a substance with 5.51% Li by mass, 43.64% Mn by mass, and 50.84% O by mass.

Based on the given image for isopentane and n-hexane, what is their empirical formula?

Calculate the empirical and molecular formula Butyric acid (molar mass = 88.11g/mol) that has a mass percent composition of 54.53 % C, 9.15 % H, and 36.32 % O.

The illustrations below show cations as green spheres and anions as pink spheres. Identify the correct illustration that represents each of the following ionic compounds:

(i) BaCrO₄

(ii) Mg₃(AsO₄)₂ 

(iii) K₂SO₄

(iv) CuBr₂

Methionine is a unique sulfur-containing amino acid that can be used to build proteins and produce molecules in the body.

Given the 3D model below, identify its molecular formula. 

Legend: H → white, S → yellow, O → red, N → blue, C → grey

When 678 mg of methylparaben is ignited, it gives off 1.570 g of CO₂ and 0.3233 g of H₂O. Determine the empirical formula of methylparaben if it is only composed of carbon, hydrogen, and oxygen.

The following data were obtained from experiments to determine the molecular formula of aniline, a precursor of urethane, which is made up only of carbon, hydrogen, and nitrogen.  Combustion analysis of 11.65-g gives 7.96 g of H₂O and 1.75 g of N₂. Aniline has a molar of 93 g/mol. What is the molecular formula of aniline?

Provide the correct formula for the following ions with correct charges

i. Cyanide ion

ii. Bisulfite ion

iii. Perchlorate ion

iv. Oxalate ion

v. Phosphite ion

vi. Bromate ion

Oxyanions that contain elements in the same group of the periodic table have an analogous formula and are named in a similar convention. Referring to this information, propose a name for the ion: AsO₄^3–.

Naming polyatomic anions can be quite confusing due to being seemingly random however there are consistent rules to be followed. 

For example, the prefix 'bi' is used to indicate an extra positive hydrogen which can be shown by the difference between  between carbonate and bicarbonate.

Another example is the suffices "ite" and "ate," which is based on number of oxygen atoms where "ite" means one less O than "ate", this difference is present when comparing sulfite and sulfate.

According to the information above infer the formula of biphosphate

Provide the name of the cation and anion in MoF₆ and identify the charges of each.

Identify the name for each of the following compounds: 

A) AgCI

B) CuS 

C) FeBr₃