Question

Tom's teacher was showing his class an experiment to find out the percentage of
oxygen in the air.
He set up the apparatus below, which consisted of two gas syringes connected by a
tube containing copper powder.
6.
syringe B
syringe A
connecting tube 5 cm
copper
100 80 60 40 20
6
20 40 60 80 100
HEAT
The teacher told the class that the volume of air in the connecting tube was 5 cm
He also told them that the copper would react with the oxygen in the air.
(a) () Calculate the total volume of air in the whole apparatus at the start of the
experiment.
bora3 +60cm Sow? 128cm
(ii) Suggest a way in which the teacher could have worked out that the volume of
the connecting tube was 5 cm
Tak total...volu
... Synings and and
ngentotund.
M..............
The teacher then started to heat the copper and repeatedly passed the air over it from
one side to the other for a few minutes.
He then allowed the apparatus to cool down.
When it had cooled down, he found that:
the pink-brown copper powder had turned black
• the volume of air had reduced to leave a total volume of 100 cm​

Answer 1

Answer:

I will tel ll I afterwards. as I have only 1 percent charging left sorry