You didn't use Ram

You are correct that the Relative Atomic Mass (RAM) was provided in the image but not used in the previous calculation.

The reason RAM was not used to calculate $N$ (number of moles) in the previous step is because the formula $N = \frac{m}{\text{RAM}}$ requires the mass of the substance deposited ($m$), which was not given in the image.

However, we can use the RAM to calculate the mass ($m$) of the substance deposited, now that we have calculated the number of moles ($N$).

Given Values from the image and previous calculation:

• Number of moles ($N$) $\approx 0.0062176$ mol (from previous calculation)
• Relative Atomic Mass ($\text{RAM}$) = 119 g/mol

Formula to calculate mass ($m$):

$$m = N \times \text{RAM}$$