dioxide
Carbon dioxide is CO2. This topic is part of Chemistry within Science & Nature. This page currently draws on 75 supporting questions, with answers and bonus facts available below.
dioxide trivia questions
The prefix di- in dioxide means how many oxygen atoms?
Answer: Two
Bonus fact: Carbon dioxide is CO2.
What gas has the formula CO2?
Answer: Carbon dioxide
Bonus fact: Carbon dioxide contains one carbon atom and two oxygen atoms.
Which dioxide gas is a major greenhouse gas emitted by burning fossil fuels?
Answer: Carbon dioxide
Bonus fact: Carbon dioxide traps outgoing infrared radiation.
What process lets yeast convert sugars into alcohol and carbon dioxide without oxygen?
Answer: Fermentation
Bonus fact: Alcoholic fermentation is central to bread and brewing.
What weak acid forms when carbon dioxide dissolves in water?
Answer: Carbonic acid
Bonus fact: CO2 and water can form carbonic acid.
What is the chemical formula for carbon dioxide?
Answer: CO2
Bonus fact: Each molecule has one carbon and two oxygen atoms.
Plants use carbon dioxide during what process?
Answer: Photosynthesis
Bonus fact: Plants use CO2 to build sugars.
Carbon dioxide is a major what gas in Earth's atmosphere?
Answer: Greenhouse gas
Bonus fact: CO2 absorbs infrared radiation and contributes to warming.
When methane burns completely, it produces carbon dioxide and what?
Answer: Water
Bonus fact: Complete combustion of CH4 forms CO2 and H2O.
Plants remove carbon dioxide from the atmosphere through what process?
Answer: Photosynthesis
Bonus fact: Photosynthesis stores carbon in organic molecules.
What process returns carbon dioxide to the atmosphere when organisms break down food?
Answer: Cellular respiration
Bonus fact: Respiration releases CO2 as cells extract energy.
What weak acid commonly forms when rainwater absorbs carbon dioxide?
Answer: Carbonic acid
Bonus fact: Carbonic acid can enlarge cracks in limestone.