[simfonia]

Concentrated HCl is 11.6M. What weight needs to be added to produce 100ml of 1M?

[Borek]

Please read forum rules.

You don't have enough information to find the answer - you can calculate necessary volume, but not mass of the solution.

Hint: you need the same number of moles of HCl that will be present in 100 mL of 0.1M solution.