Question 1:
Question 2:
This time again we used the Chem organic set to build the molecule and recorded a video of the reaction mechanism:
Two SN2 reactions will occur. The first one:
And the second one:
and as we can see from the molecular set, the product is achiral. Therefore there is only one possible product with no other isomers formed.
Question 3:
nice video and a good demonstration with molecular kit.
for Q2, it would be better if you elaborate on the stereochemistry of the two thiolated carbon in final product.
Q1 and Q3 are well done!