Which of the following is not a feature of iron (iii) oxide?
(a) red-orange in colour
(b) forms a protective barrier
(c) falls off in flakes
(d) requires moisture to form
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Ответ:
Signed General Penguin
P - potassium
S - sodium
L - lithium
M - magnesium
C - calcium
A - aluminium
Z - zinc
I - iron
L - lead
H - hydrogen
C - copper
S - silver
G - gold
P - platinum