Question

A grade 8 students burnt white phosphorus in the air contained in a bell jar. what will be the volume of the renaming air in the bell jar.
A. 20%of the air
B. 50% of the air
C. 25% of the air
D. 79%of the air

Answer 1

Answer:

C is correct

Explanation:

to show oxygen and nitrogen component in the air using a bell jar.

Apparatus - a trough, a bell jar, a cork, a crucible, and a piece of white phosphorus.

Procedure - A trough is filled with and a bell jar is labeled into 5 equal parts.

A crucible with white phosphorus placed on a cork is floating in the water.

The level of water inside the jar and outside the jar is adjusted to one level

The phosphorus is ignited by means of an ignited wire.

Observation - The phosphorus burns in the air with oxygen and forms dense white fumes of phosphorus pentoxide.

Oxygen is the active component in the air that burns phosphorus and nitrogen is the inactive component of air that is not used in burning.

Answer 2

Try d cuz if im not mistaken if you burnt white phosphorus all the gas is going to take most the air