A gas cylinder contains a mixture of compressed gases. The label reads:
21% oxygen, 78% nitrogen and 1% argon. When the cylinder is full the pressure is 6000 kPa.
What is the partial pressure of the oxygen?

The is a particle with one unit of positive charge a. proton b. positron c. electron d. nucleus awnser quick it is a important science test!

Select all that apply. a beta particle: is electromagnetic energy is an electron has zero charge is emitted from the nucleus has a +2 charge has a -1 charge

In which environment would primary succession occur? a forest with a few remaining trees after a recent wildfire an area of exposed rock after a glacier melts away beach that is exposed to the air at low tide an abandoned baseball field in a small town