Post a New Question

chemistry

posted by .

A patient receives 3.0 mL of a solution containing technetium-99m for a breast image. If the activity of the technetium-99m is 9.5mCi/mL what is the dose received by the patient?
Answer Choices are:
a)29mCi b)3.2mCi c)320uCi d)28.5mCi

So I times 3.0mL * 9.5 = 28.5
But the answer in the book is 29mCi
So why would it be 29mCi and not 28.5?
Thanks for your help!

  • chemistry -

    I, too, obtained 28.5 mCi; however, that isn't the problem. The problem is that the number 3.0 mL has only two significant figures as does the 9.5; therefore, you can't have an answer with 3 s.f. I would round the 28.5 to 28 but that isn't one of the choices so 29 is the obvious one to choose.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

More Related Questions

Post a New Question