Well if its calling for a BAR then i would use the whole bar.
2
There is no square relevant to tablespoons.
One square of chocolate usually has a weight of one ounce. One ounce can be easily divided into 3 tablespoons.
86 semi-sweet chocolate chips equals 3 squares of semi-sweet baking chocolate.
2 tablespoons
5.509 tablespoons.
The label says each square is equal to 1/2 ounce.
One square of baking chocolate usually equals one ounce. Check the packaging to be sure, especially if the chocolate is not made in the USA. A recipe that asks for two squares of bakers chocolate generally means two ounces of chocolate. Remember that baking chocolate is most often unsweetened, so you should not substitute milk chocolate or semisweet because these chocolates already have sugar added.
1 tablespoon is 15gm. That is 12.3 tablespoons .
It depends. How many ounces is each square worth? Also, you might want to check the ingredients to make sure they match your baking needs or that they are at least similar to the ingredients of the candy bar.
4
"Square of chocolate" is too nebulous. I need a recognised weight or volume.
To make 12 ounces of hot chocolate, 3 tablespoons of cocoa are needed. How many tablespoons of cocoa are needed to make 72 ounces of hot chocolate?