Candle Chemistry and Mass Changes

The video explores where candle wax goes when a candle burns. It begins by weighing a candle to observe mass loss over time, revealing that the wax transforms into gases like carbon dioxide and water. The chemical reaction is explained, showing that the wax, made of carbon and hydrogen, reacts with oxygen to form these gases. A demonstration highlights the necessity of oxygen for the candle to burn, as removing it causes the candle to extinguish. The video concludes by summarizing that the mass of the candle decreases as the wax turns into gases.

What is the main question addressed in the video?

• What is the composition of candle wax

• How to make a candle

• How to extinguish a candle

• Where does candle wax go when a candle burns

What was the initial mass of the candle in the experiment?

• 43.0 grams

• 42.0 grams

• 40.5 grams

• 41.7 grams

After five minutes of burning, what was the mass of the candle?

• 41.0 grams

• 40.7 grams

• 42.0 grams

• 41.7 grams

Where did the lost mass of the candle go?

• It turned into ash

• It evaporated into the air as gases

• It melted into the glass

• It remained in the candle

What are the main components of candle wax?

• Carbon and hydrogen

• Iron and magnesium

• Oxygen and nitrogen

• Sulfur and phosphorus

What gases are produced when candle wax burns?

• Hydrogen and helium

• Methane and ethane

• Carbon dioxide and water

• Oxygen and nitrogen

What happens to the candle when it is covered with a beaker?

• It burns brighter

• It goes out

• It melts faster

• It produces more smoke

What causes the beaker to become foggy when the candle is covered?

• Smoke from the candle

• Condensation of water

• Dust particles

• Chemical reaction with the beaker

What is the result of the chemical reaction when a candle burns?

• The wax turns into a solid

• The wax turns into liquid

• The wax remains unchanged

• The wax transforms into gases

What happens to the mass of the candle as it burns?

• It remains the same

• It decreases

• It increases

• It fluctuates