Question
A vial contains radioactive iodine-131 with an activity of 2.0 mCi/mL. If a thyroid test requires 2.2 mCi in an "atomic cocktail," how many milliliters are used to prepare the iodine-131 solution?
Express the volume to two significant figures and include the appropriate units.
Express the volume to two significant figures and include the appropriate units.
Answers
GPT 3.5
To find the volume of the iodine-131 solution needed to prepare the "atomic cocktail," we can use the formula:
Volume (mL) = Activity (mCi) / Concentration (mCi/mL)
In this case, the activity of the iodine-131 is 2.0 mCi/mL and the required activity for the thyroid test is 2.2 mCi. Plugging these values into the formula:
Volume (mL) = 2.2 mCi / 2.0 mCi/mL = 1.1 mL
Therefore, 1.1 mL of the iodine-131 solution is needed to prepare the "atomic cocktail."
Volume (mL) = Activity (mCi) / Concentration (mCi/mL)
In this case, the activity of the iodine-131 is 2.0 mCi/mL and the required activity for the thyroid test is 2.2 mCi. Plugging these values into the formula:
Volume (mL) = 2.2 mCi / 2.0 mCi/mL = 1.1 mL
Therefore, 1.1 mL of the iodine-131 solution is needed to prepare the "atomic cocktail."