# data[].attributes.body
(I) because the copper reacts with oxygen
(Ii) different temperatures of air have different volumes and density
(iii) all the oxygen will have been used up in the reaction with the larger pile of copper
(iv) 10.5cm^3

# data[].attributes.body
(i) because it reacts with oxygen to form copper oxide, CuO
(ii) because the air expands when cooling, so reading it before it has cooled down might lead to inaccurate results.
(iii) because the small pile of copper haven't reacted with oxygen.
(iv)  approximately 39.5cm³

# data[].attributes.body
i) The copper turns black as it had reacted with oxygen to form Copper oxide, CuO.

ii) The air must cool as when most gases are heated they expand due to the particles gaining kinetic energy.
iii)The oxygen may have either not passed through the small pile or there may have not been enough oxygen to react with the small copper pile.
iv)39.5

# data[].attributes.body
(i) It reacts with the oxygen which them makes copper oxide.
(ii) When heated the gas will expand
(iii) There is no more oxygen to react with. So it doesn't turn black.
(iv)39.5

# data[].attributes.body
It has reacted with the oxygen that forms copper oxide
The air expands
Less surface area maybe or the oxygen had all reacted with the large pile  due to higher volume
29

# data[].attributes.body
i) The copper reacts with oxygen and form copper oxide
ii) It needs to cool down as the gases would expand when it’s hot so if we measure it when it’s still hits then we would get inaccurate result
iii) The small pile doesn’t not turn black becuase there is no more remaining oxygen to react with
iv) 79% of 50 = 39.5... therefore the volume of remaining gas left is 39.5cm^3

# data[].attributes.body
I) there is a change in colour as the copper exacts with oxygen to produce copper oxide.
ii) th said in the syringes will have expanded when the air was heated to it has to cool first.
iii) the copper did not react with the oxygen as there is little oxygen in the air left.
IV) 79% is left so 50x 79/100 = 39.5

# data[].attributes.body
(i) The copper turns black as it reacts with oxygen to form Copper Oxide.
(ii) Because when we stop heating the tube the air in the syringe was expanded therefore we need to cool down.
(iii) Because the copper in the small pile did not react with oxygen since the big pile reacted with the oxygen.
(iv) 29cm3

# data[].attributes.body
(I) because it became copper oxide
(Ii) cuz then the air would expand and it would be inaccurate
(iii) it didn't react with the oxygen

# data[].attributes.body
(I) Copper turns black because copper reacts with oxygen to form copper oxide (which is black)

(II) because gas expands under heat so the reading is inaccurate

(IV) 10.5 cm3

# data[].attributes.body
(i) because the copper reacted with oxygen to form copper oxide
(ii) because the air in the syringes will have expanded
(iii) because it didn't react with oxygen
(iv) 39.5cm³

# data[].attributes.body
(i) The copper turns black because it reacts with oxygen.

(ii) To let the air in the syringes to expand.

(iii) The copper did not turn black because it did not react with oxygen.

(iv)

# data[].attributes.body
i)the copper reacted with the oxygen to get copper oxide
ii) because they still may be some copper reacting with oxygen even without the bunsen burner
iii)It did not react with the oxygen
iv)Approximately 10.5cm3

# data[].attributes.body
i) The copper pile turned black because copper reacted with oxygen to form copper oxide

ii) Because gas expands when heated

iii) Because oxygen chose to react with the bigger pile of copper and not the smaller pile

iv) 39.5 cm^2