Discovering Oxygen Flashcards
1
Q
How do you change oxygen gas into a liquid
A
Cooling it to a very low temperature
2
Q
How do substances burn in oxygen comparted to burning in air
A
Substances burn much better in air
3
Q
What happens to mercury when heated in air
A
It turns into a red powder
4
Q
When phosphorus is burned what happens to the air trapped in the bell jar
A
Some of the air disappears
5
Q
What two changes happen to magnesium when it is burned in air
A
It turns into a white ash
Gains mass
6
Q
Why does magnesium gain mass when burned in air
A
Because it taken in oxygen from the air
7
Q
Who was the English chemist who made a sample of oxygen
A
Joseph Priestly
8
Q
What happened when a glowing splint was placed in oxygen
A
It burst into flame
9
Q
What happened when the wax taper was placed in oxygen
A
It burned brightly
