Understanding Water Combustion and Stability

Why is water considered to have already undergone combustion?

• Because it contains oxygen

• Because it is a liquid

• Because it is formed from hydrogen and oxygen

• Because it is used in space shuttles

What is the main product when hydrogen and oxygen combust?

• Nitrogen

• Water

• Carbon dioxide

• Methane

How many molecules of water are formed from two molecules of hydrogen and one molecule of oxygen?

• One

• Three

• Four

• Two

What does the bent shape of a water molecule indicate?

• It is unstable

• It has high energy

• It has chemical bonds

• It is a gas

Why is water considered a stable molecule?

• It is in a lower energy state

• It is abundant on Earth

• It is a solid at room temperature

• It has a high boiling point