# How do you balance chemical equations in Grade 9?

## How do you balance equations in chemistry?

1. A chemical equation represents the changes that occur during a chemical reaction.
2. Coefficients are used to balance chemical equations.
3. To balance a chemical equation, place coefficients as needed in front of the symbols or formulas so the same number of each type of atom occurs in both reactants and products.

## What are the 4 steps to balancing chemical equations?

1. Step 1: Make a Table. In a chemical equation there are subscripts and coefficients.
2. Step 2: Determining and Balancing the First Element. Pick an element that appears in one molecule on the left side and in one molecule on the left.
3. Step 3: Balancing Hydrogen.
4. Step 4: Balancing Oxygen.

## What does -> mean in chemistry?

An arrow sign (“→” commonly read aloud as “yields”) separates the two. The state attributes of products and reactants, either aqueous (dissolved in water — aq), solid (s), liquid (l), or gas, should be included in chemical equations.

## What does G mean in a chemical equation?

(g) indicates that the substance is in a gaseous state. an alternative way of representing a substance in a gaseous state. (s) indicates that the substance is in a solid state.

## What are the 5 types of chemical reactions examples?

• Combination (Synthesis) reaction. A + B → AB.
• Decomposition reaction. AB → A + B.
• Displacement reaction. A + BC → AB + C.
• Double displacement reaction. AB + CD → AD + BC.
• Combustion reaction.

## What type of reaction is CH4 O2 → CO2 H2O?

The combustion of methane or octane is exothermic; it releases energy. CH4 + 2 O2 → CO2 + 2 H2O + energy The energies of the products are lower than the energiies of the reactants.

## What law says we need to balance chemical equations?

Conservation of matter is the law. You can also call it the conservation of mass. When we balance an equation, we determine the ratio of reactants to products which allows for the total number of atoms of reactants to match the number of atoms of the products.