the concepts of mole and chemical reactions, the element of the three compounds can be found.
compound 1 carbon - Nitrogen CN
compound 2 carbon - Oxygen CO
compound 3 carbon - Sulfur CS
Chemical reactions are expressed in moles of each constituent element. The mole is one of the fundamental quantities of physics and is defined as the amount of matter in 0. 012 kg of carbon 12, in practical form the moles of a given element in a chemical reaction is found with the expression
n = m / Pm
where n is the number of moles, m the mass of the element and PM the molecular weight (taken from the periodic table) of the element.
Let's apply to our compounds as the chemical formula is CX, there is an atom of each element, let's look for the moles of carbon.
compound 1
mass of coal 4.2
carbon mole
n_C = 4.2 / 12
n_C = 0.35 mol
as in the chemical reaction there is an atom of each element, there are also 0.35 moles of the unknown element, let's find its molecular weight (PM)
PM = m / n
PM = 4.9 / 0.35
PM = 14 gr / mol
When reviewing the periodic table this weight corresponds to Nitrogen(N)
The elect is Nitrogen
compound 2
carbon mass 3.5
carbon moles
n_C = 3.5 / 12
n_C = 0.29167
moles of unknown element n = 0.29167
mass of unknown element m = 4.67
molecular weight
PM = 4.67 / 0.29167
PM = 16 gr / mol
Checking the periodic table corresponds to the element Oxygen (O)
Compound 3
carbon mass 1.3
carbon moles
n_C = 1.3 / 12
n_C = 0.1083
moles unknown element n = 0.10833
mass unknown element m = 3.47
PM = 3.47 / 0.10833
PM = 32 gr / mol
In the periodic table the element Sulfur (S) has this molecular weight
Using the concepts of mole and chemical reactions, the elements of the three compounds can be found.
compound 1 carbon - Nitrogen CN
compound 2 carbon - Oxygen CO
compound 3 carbon - Sulfur CS
learn more about chemical reactions and mole here: brainly.com/question/14918587
