Correct Answer: Option C

Explanation

First let's find z

z = \(\frac{M}{It}\)

z = \(\frac{1.8}{2.5 \times (3 \times 60 \times 60)}\)

Therefore, the new M equals

M = zIt

M = \(\frac{1.8 \times 4 \times 4.8 \times 60 \times 60}{2.5 \times 3 \times 60 \times 60}\)

M = 4.6g

There is an explanation video available below.

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