final practice explaination of stoichiometry

https://www.youtube.com/watch?v=zv-Z-eaE_RE&t=33s

Stoichiometry (Greek: stoicheon: element, metrain: measure) is a chemical field that studies the quantitative aspects of an element in a compound or reaction. In other words, stoichiometry is a chemical calculation involving the quantitative relation of substances involved in the reaction. Stoichiometry includes basic chemical laws that indicate quantitative relationships within it. The laws are as follows:

Stoichiometry - Basic Law of Chemistry

1. The Law of Conservation of Mass

In 1774, a scientist from Francis Lavoiser conducted an experiment by heating Tin and Oxygen gas in a recluse. From the results of his experiment, Lavoiser found that there was no mass change in his experiments. Then he puts the so-called Mass Conservation Law, which reads:

"In chemical reactions, the mass of reactants is equal to the mass of the reaction product"

2. Comparable Law of Comparison

In contrast to Lavoiser, Proust studied elemental elements in compounds focused on the comparison. He puts forward the law that "In a chemical reaction, the mass of a substance which reacts with a certain amount of other substances is always fixed". 

3. The Law of Multiple Comparisons

This law was put forward by John Dalton. He was interested. To study the elements that can form more than one type of compound. The law reads:

"If two elements can form more than one compound, then the ratio of the elemental masses to one of the other elements of a certain mass, is an integer and a simple"

4. Avogadro's Law

Amando Avogadro in 1811 resumed the Gay Lussac experiment. Avogadro was very interested in studying the nature of the gas and hypothesized:

"At the same temperature and pressure, all the same volumes of gas have the same number of molecules".

Stoichiometry Reaction

In chemical reactions, the amount of reacting reactants is sometimes incompatible with the stoichiometric amount of the reaction (not in accordance with the coefficient ratio of the equivalent equation). Therefore, there will be reactants that have reacted first compared to other reactants. The reactants that remain after reacting are called excess reagents. The out-of-date reactant is called a limiting reagent. After the barrier reagents are exhausted, no more reaction products are formed. Thus, the number of limiting reagents determines the amount of product produced.