When you burned copper, the product copper oxide appeared on the wire. Besides copper, the other reactant is
air
⇒ oxygen, O2.
Explain how you know it must be oxygen. Where did the oxygen come from?

What is important to study for nios grade 12 chemistry? i have only one month left.

Plz mark brainliest 30 points 1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s. 2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit by the cue ball (1 kg) traveling at 2.5 m/s. if the cue ball is at rest after the collision, how fast is the 8 ball traveling after the collision? 3) two football players are running toward each other. if the offensive player is 75 kg and is running 8 m/s, how fast must the 60 kg defensive player run in order for the two players to hit and stop?

Identify a strong intermolecular force of attraction between an alcohol