3g of a metal (iii) reacts with mercury (ii) chloride to form metal (iii) chloride and mercury (ii) iodide. Identify unknown metal product.

Answer 1

The lower case i is not correct. It should be, for example, mercury(II) chloride.

What does metal(iii) mean? Is that an M^3+ ion.
And where does the I of HgI2 come from?
I think your post needs editing and re-posting.

Answer 2

Another.
You didn't tell us how much metal(III) chloride OR how much HgI2 was formed. We beed one of them.