7.1 Air Flashcards
1
Q
What gases make up air + percentages
A
78% nitrogen
21% oxygen
0.9% noble gases
0.7% water and water vapour
0.03% carbon dioxide
2
Q
Oxygen test
A
Relight glowing point
Burning splint burn more brightly
3
Q
Carbon dioxide test
A
Hydrogencarbonate indicator red to yellow
Limewater colourless to milky
4
Q
Water and water vapour test
A
Dry cobalt chloride paper blue to pink
5
Q
Nitrogen, noble gases test
A
No simple test
6
Q
Oxygen application
A
Help breathing difficulties
7
Q
Co2 application
A
Put out fire
Fog effect
8
Q
Nitrogen application
A
Fill food packages
9
Q
Noble gases application
A
Argon: bulbs
Helium: balloons
Neon: advertising lights
