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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.
Wiki User
∙ 11y ago
The small number 2 in a chemical equation represents the coefficient, which indicates the ratio of reactants and products in the reaction. For example, in the equation 2H2 + O2 → 2H2O, the coefficient 2 indicates that two molecules of hydrogen react with one molecule of oxygen to form two molecules of water.
Wiki User
∙ 11y agoThe sub scripted 2 means that there are 2 Oxygen atoms is every molecule of CO2 (Carbon Dioxide)
Wiki User
∙ 12y agoThe little 2 means that is has two of that particular substance
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Which number in a chemical equation shows you the number of atoms?
The subscript number next to the chemical element symbol shows the number of atoms of that element in a chemical equation.
How does a chemical equation show that matter is always conserved in a chemical reaction?
A balanced chemical equation demonstrates the law of conservation of matter by showing that the total number of atoms of each element on both sides of the equation remains constant. This means that no atoms are lost or created during a chemical reaction, only rearranged.
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 balanced chemical equation show the conservation of mass?
A balanced chemical equation ensures that the number of atoms of each element is the same on both sides of the equation. This demonstrates the law of conservation of mass, which states that matter is neither created nor destroyed in a chemical reaction. By balancing the equation, we can see that the total mass of the reactants is equal to the total mass of the products.
What is a correctly written chemical equation?
A correctly written chemical equation should show the reactants on the left side and the products on the right side, separated by an arrow. The equation should be balanced, meaning that the number of each type of atom is the same on both sides of the equation. The chemical formulas of the substances involved should be correctly written with the appropriate subscripts and coefficients.
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 subscript number next to the chemical element symbol shows the number of atoms of that element in a chemical 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.
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
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?
A balanced chemical equation demonstrates the law of conservation of matter by showing that the total number of atoms of each element on both sides of the equation remains constant. This means that no atoms are lost or created during a chemical reaction, only rearranged.
How does the chemical equation show that a chemical reaction occurred?
When a compound produces.
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 shorter easier way to show chemical reactions using symbols instead of works is called?
The shorter and easier way to show chemical reactions using symbols instead of words is called a chemical equation.
What is a correctly written chemical equation?
A correctly written chemical equation should show the reactants on the left side and the products on the right side, separated by an arrow. The equation should be balanced, meaning that the number of each type of atom is the same on both sides of the equation. The chemical formulas of the substances involved should be correctly written with the appropriate subscripts and coefficients.
How does a balanced chemical equation show the conservation of mass?
A balanced chemical equation ensures that the number of atoms of each element is the same on both sides of the equation. This demonstrates the law of conservation of mass, which states that matter is neither created nor destroyed in a chemical reaction. By balancing the equation, we can see that the total mass of the reactants is equal to the total mass of the products.
