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Don't know what "this" chemical reaction is, but chances are, the small 2 is a subscript. Subscripts are used in chemistry to represent how many atoms you have in a compound. For example, in the formula MgCl2, that 2 tells you that you have 2 chlorines for every 1 magnesium. If there is no subscript (like after the magnesium), that means there's only 1 atom. Kind of like in algebra, when you see the variable "x" it really means 1-times-x; you just don't show the 1. In chemistry, the subscript only refers to whatever element is immediately before it. If the subscript is outside a set of parentheses, it refers to everything within the parentheses.
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Which number in a chemical equation shows you the number of atoms?
The coefficient times the subscripts in a chemical formula show you the number of atoms of each element for each substance in the equation.
How does the chemical equation show that a chemical reaction has occured?
A compund
How does chemical equations show a conservation of mass?
A properly written chemical equation will always show the same number of atoms of each elemental on each side, showing that no atoms are created or destroyed in the chemical reaction.
How does a chemical equation show that matter is always conserved in a chemical reaction?
According to the Law of Conservation Of Mass,Matter is neither created nor destroyed.It means a chemical equation show that matter is always conserved in a chemical reaction.It is shown as number of atoms both sides of the reaction before and after remains the same.
How do the coefficients in a balanced equation compare quantites of two substances?
These coefficients show the number of molecules involved in the chemical reaction.
Does a chemical equation show the number of atoms lost during a chemical reaction?
no
Which number in a chemical equation shows you the number of atoms?
The coefficient times the subscripts in a chemical formula show you the number of atoms of each element for each substance in the equation.
How are equation coefficients useful in determining amounts of reactions and products?
Equation coefficients show the number of molecules involved in a chemical reaction.
How does the chemical equation show that a chemical reaction has occured?
A compund
What is a chemical equation balanced does it show?
Chemical equations are representative for chemical reactions.
What is a special type of sentence that show what happens during a chemical reaction?
a word equation, or a chemical equation
How does chemical equations show a conservation of mass?
A properly written chemical equation will always show the same number of atoms of each elemental on each side, showing that no atoms are created or destroyed in the chemical reaction.
A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products.?
This representation is a chemical equation.
How does a chemical equation show that matter is always conserved in a chemical reaction?
According to the Law of Conservation Of Mass,Matter is neither created nor destroyed.It means a chemical equation show that matter is always conserved in a chemical reaction.It is shown as number of atoms both sides of the reaction before and after remains the same.
How does the chemical equation show that a chemical reaction occurred?
When a compound produces.
How do the coefficients in a balanced equation compare quantites of two substances?
These coefficients show the number of molecules involved in the chemical reaction.
What is the statement that uses chemical formulas to show the identities and relative amounts involved in a chemical reaction?
Chemical Equation
