B-it allows the filament to heat up and glow
Answer:

Explanation:
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In this case, given the reaction, we can directly compute the theoretically yielded grams of carbon dioxide, considering the 2:2 molar ratio between carbon monoxide (molar mass = 28 g/mol) and carbon dioxide (molar mass = 44 g/mol) and the initial reacting grams of carbon monoxide in excess oxygen:

Thus, as only 8 g were actually yielded, we compute the percent yield:

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The method which is appropriate for separating a mixture of iron and aluminum is A. using a magnet.
This is because aluminum does not have magnetic properties (thus it will be unaffected by the magnet), so it is easy to sort out all iron from the mixture using a magnet.
Answer:
By transfer of electron from electropositive to electronegative elements
Explanation:
Examples are NaCl, MgO, Al2O3
The answer is b cause that's the answer