Balancing Chemical Equations

Who was the scientist that established the law of conservation of mass?

• Isaac Newton

• Albert Einstein

• Dmitri Mendeleev

• Antoine Lavoisier

What did Dalton's atomic theory contribute to chemistry?

• It explained the periodic table.

• It introduced the concept of atoms.

• It described the structure of DNA.

• It discovered the electron.

What is the main purpose of balancing chemical equations?

• To make the equation look neat.

• To increase the reaction speed.

• To change the chemical properties.

• To ensure the same number of atoms on both sides.

In a balanced chemical equation, what must be conserved?

• Mass

• Energy

• Temperature

• Volume

What is a helpful method for beginners to balance chemical equations?

• Guessing the numbers

• Memorizing all equations

• Drawing out the molecules

• Using a calculator