# Answer on Physical Chemistry Question for Kimberly

Question #17663

Vial contains radioactive iodine-131 with an activity level of 2.0 mCi. Thyroid test requires 3.0 mCi. How many mL needed to prepare solution?

Expert's answer

You would need 1.5 ml to get atotal of 3 mCi I131

Stock solution contains 2.0 mCi/ml * X ml = 3.0 mCi

X= 3.0/2.0

X= 1.5 ml

Stock solution contains 2.0 mCi/ml * X ml = 3.0 mCi

X= 3.0/2.0

X= 1.5 ml

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