Chemical equation balancing

What is the left part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

• Yields

• Products

• Chemical equation

• Reactants

What is the right part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

• Reactants

• Yields

• Products

• Chemical Equation

 

How many Mn atoms are found in the following compound?

2MnO₄

• 2

• 4

• 6

• 8

What is the little number after an element in a chemical equation called?

Example: H₂

• Coefficient

• Atom

• Subscript

• Equation

What is the number before a chemical formula called?

Example: 2H₂ + O₂ ---> 2H₂O

• Coefficient

• Atom

• Subscript

• Equation

Which of the following equations are correctly balanced?

• CO₂ + H₂O ---> 3C₆H₁₂O₆ + O₂

• 12CO₂ + H₂O ---> C₆H₁₂O₆ + O₂

• 6CO₂ + 6H₂O ---> C₆H₁₂O₆ + 6O₂

• CO₂ + 9H₂O ---> C₆H₁₂O₆ + O₂

Balance this equation:

H₂ + Cl₂ ---> HCl

• H₂ + Cl₂ ---> 2HCl

• H₂ + 3Cl₂ ---> 6HCl

• 3H₂ + Cl₂ ---> 6HCl

• It is balanced.

Q. 

Complete the sentence.

During a chemical reaction, atoms ________.

• can disappear

• can appear

• stop moving and vibrating

• get rearranged

What is a coefficient?

• The small number on the right of the chemical symbol.

• The large number in front of a chemical formula.

• The number in between the chemical symbols.

• The number behind a chemical formula.

What is the Law of Conservation of Mass?

• It states that atom cannot be created or destroyed.

• It states that energy cannot be created or destroyed.

• It states that atom can be created or destroyed.

• It states that sound can be created or destroyed.