Determine the mass fraction of iron in its compounds:

Fe(NO₃)₃ = 0.23; FeCl₃ = 0.34

Explanation:

Mass fraction is defined as the ratio between the mass of iron in 1 mol of the compound and the mass of the complete compound.

In Fe(NO₃)₃ there is just 1 atom of Fe that has a molar mass of 55.845g/mol. The molar mass of this compound is 241.86g/mol. Thus, mass fraction is:

55.845g/mol / 241.86g/mol =

In FeCl₃ there is 1 atom of Fe that has a molar mass of 55.845g/mol. The molar mass of this compound is 162.2g/mol. Thus, mass fraction is:

55.845g/mol / 162.2g/mol =

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: