a. 0.28 M

**Answer 1**

We can use the following equation:

M1V1 = M2V2

Basically, that says that the value of molarity*volume before should be the same as after the dilution.

Thus,

M1 = 6.5

V1 = 1.85

M2 = ???

V2 = 11.0

Plug and chug away…!

Solve for M2, we get

(6.5)(1.85) = M2(11.0)

M2 = 1.0932 = ~1.1 M

[Answer: C]

**Answer 2**

Use the equation M1V1=M2V2

m1 = 6.5

v1 = 1.85

v2 = 11.0

and solve for M2 the final molarity.