Chemical Reactions Overview and Types

According to the law of conservation of mass, the total mass of the reaction substances is...

In the reaction described by the word equation: sodium + water ---> sodium hydroxide + hydrogen gas...

What indicates that a chemical equation is balanced?

From a complete and correctly written chemical equation, you can obtain the...

To balance a chemical equation, you must...

The formation of a solid product in a chemical reaction can be represented by the symbol...

In the expression 3CO₂, the numbers 3 and 2 are, respectively...

What is the total number of molecules that is represented by the follow equation? (Add up the coefficients) NH₄NO₂ ---> N₂ + 2H₂O

In which type of reaction do two or more compounds react to form one product?

Which is true regarding single-replacement reactions?

Which is true regarding double-replacement reactions?

A mixture of propane and oxygen react to form carbon dioxide and water. What type of chemical reaction is this?

The slightly soluble solid compound produced in a double-replacement reaction is called a...

To balance a chemical equation, it is permissible to adjust the...

In a chemical equation, the symbol (aq) indicates that the substance is...

Law of conservation of mass states the total mass of reactants equals the total mass of products.
In the reaction of sodium and water, sodium hydroxide is the product while water is a reactant.

A balanced chemical equation has equal numbers of atoms for each element on both sides.
Balancing requires adjusting coefficients, not subscripts.
Example: In the expression 3CO₂, "3" is a coefficient and "2" is a subscript.

A complete chemical equation provides formulas for reactants and products, their relative amounts, and physical states.
Chemical symbols: (s) indicates a solid precipitate; (aq) indicates a substance is dissolved in water.

Synthesis Reaction: Two or more compounds react to form one product.
Single-Replacement Reaction: One element replaces another in a compound.
Double-Replacement Reaction: Involves exchange of ions, producing two new products, often resulting in a precipitate.
Combustion Reaction: A hydrocarbon like propane reacts with oxygen to yield carbon dioxide and water.

The total number of molecules in a reaction is determined by summing the coefficients of the reactants and products. Example from NH₄NO₂ to N₂ + 2H₂O yields a total of 4 molecules.