How many milliliters of a 10% KCL (MW 74.6) solution contain 5.0 mEq of K+

How many milliliters of a 10% KCL (MW 74.6) solution contain 5.0 mEq of K+?
a- 2.100ml
b- 21.000ml
c- 3.730ml***
d- 37.300ml
e- 0.373ml.
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