Chemical Equations weekly Test

Front

What is a chemical reaction?

Back

A process where reactants transform into products, involving the breaking and forming of chemical bonds.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

Front

How do you calculate the mass of reactants in a chemical equation?

Back

Add the masses of all reactants to find the total mass before the reaction.

Front

What does the formula Sr3(PO4)2 represent?

Back

Strontium Phosphate, which contains 3 Strontium atoms and 2 Phosphate groups, equating to 2 Phosphorus atoms.

Front

What is a balanced chemical equation?

Back

An equation where the number of atoms for each element is the same on both sides, ensuring mass conservation.

Front

What is the significance of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in the reaction.

Front

What is the role of oxygen in combustion reactions?

Back

Oxygen acts as an oxidizing agent, reacting with fuels to produce energy, carbon dioxide, and water.

Front

What is a product in a chemical reaction?

Back

The substances formed as a result of a chemical reaction, found on the right side of the equation.

Front

What is a reactant in a chemical reaction?

Back

The starting substances that undergo change during a chemical reaction, found on the left side of the equation.

Front

How do you identify the number of atoms in a compound?

Back

Count the subscripts in the chemical formula; for example, H2O has 2 Hydrogen and 1 Oxygen atom.