During a science competition, John and Xinyi were given this data:- Nitrogen boils at –196°C- Oxygen boils at –183°C- Argon boils at –186°CIn fractional distillation of air, in what order will these gases be collected as the liquid air warms?
John, still full of bad ideas, decided to burn magnesium ribbon in the air sample to 'see what happens'. After burning, what product would remain in the jar?
During Science Club, Xinyi tries to calculate how much CO₂ is formed when 4 moles of carbon monoxide are passed through a catalytic converter.
John asked Xinyi, “What’s the main gas in the air?” What is the correct composition of clean, dry air at sea level?
Xinyi and John study the carbon cycle. Which step directly removes carbon dioxide from the atmosphere?
Xinyi is learning about atmospheric gases. She found out that nitrogen makes up 78% of dry air and oxygen about 21%. Which feature of nitrogen explains why it does not easily react in the atmosphere?