Answer:
Its be 1,2 and 4.
Explanation:
Since changing the direction won't do anything to a electric magnet.
Answer:
Number of moles of iron are 4 mol.
Explanation:
Given data:
Mass of iron = 223.4 g
Number of moles = ?
Solution:
Molar mass of iron = 55.85 g/mol
Formula:
Number of moles = mass/molar mass
Number of moles = 223.4 g/ 55.85 g/mol
Number of moles = 4 mol
The answer to this is to prevent dilution of the base, which may affect the results. I think that is right.
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