Given the formula m1v1=m2v2, where m indicates concentration and v indicates volume, which equation represents the correct way to find the concentration of the dilute solution (m2)?

The formula is m1v1 = m2v2.

If m1, v1 and v2 are given, then the concentration of the dilute solution (m2) can simply be calculated by substituting the givens in the mentioned equation then using cross multiplication to get the unknown value as follow:

m2 = (m1v1) / v2

So what you would do is go through and add 3 teaspoons(tsp) 6 times because of the 6 tablespoons(tbsp). which will give you an answer of 18. another way is to multiply 3x6=18.

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts