gases in the atmosphere Flashcards
1
Q
carbon dioxide
A
0.04%
2
Q
argon
A
0.96%
3
Q
oxygen
A
21%
4
Q
nitrogen
A
78%
5
Q
combustion of magnesium in oxygen
A
burns with a bright white flame and forms a white power (magnesium oxide)
6
Q
combustion of hydrogen in oxygen
A
pale blue flame and produces water vapour, gives the squeaky pop
7
Q
combustion of sulfur in oxygen
A
pale blue flame and produces sulfur dioxide
8
Q
magnesium oxide
A
slightly alkaline when dissolved in water
9
Q
sulfur dioxide
A
acidic when dissolved in water
10
Q
thermal decomposition of copper (II) carbonate
A
forms copper oxide and carbon dioxide
11
Q
copper carbonate colour
A
black
12
Q
copper oxide colour
A
black
