A solution of selenium-75, a radioisotope used in the diagnosis of pancreatic disease, is found just prior to administration to have an activity of 44 μCi/mL. If 3.89 mL were delivered intravenously to the patient, what dose of Se-75 (in μCi) did the patient receive? Express your answer using two significant figures.

A solution of selenium-75, a radioisotope used in the diagnosis of pancreatic disease, is found just prior to administration to have an activity of 44 μCi/mL. If 3.89 mL were delivered intravenously to the patient, what dose of Se-75 (in μCi) did the patient receive? Express your answer using two significant figures.

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter21: Biochemistry

Section: Chapter Questions

Problem 2QAP

See similar textbooks

Similar questions

Thallium-201 is a radioisotope used in brain scans. If the recommended dose is 3.0 mCimCi and a vial contains 70. mCimCi in 50. mLmL , how many milliliters should be injected?
You have a 11.5 mg sample of blood that contains various proteins. Hemoglobin is the only protein in the sample containing Fe. Hemoglobin contains 3.83% by mass of a compound called heme (C34H32FEN.O4, MW = 616.49 g/mol). You find that your 11.5 mg blood sample contains 10.9 micrograms of Fe. What is the mass percent of hemoglobin in your protein sample?
An ore sample is known to contain copper sulfate pentahydrate, CuSO4•5H2O. If a 10.392 g sample of the ore loses 0.9630 g of water when heated strongly, what is the maximum mass, in grams, of CuSO4•5H2O that could have been in the sample? (MW of CuSO4•5H2O = 249.55 g/mol)
A chemist attached a NFPA symbol (illustrated below) on the bottle of a newly manufactured chemical. If the chemical is unstable if heated, what must be the reactivity grade of the hazard in the posted area?
4. Two engineers are serving as trainees in a laboratory of a pharmaceutical company. One of their tasks involves determining the identity of a vitamin they were given by using any equipment or method at their disposal. As a hint, their supervisor gave them a list of possible candidates for the vitamins identity which includes: Vitamin Molecular Formula Folinic Acid C20 H23 N707 C3H11NO3 C,H,N20 C17H20N406 Pyridoxine Niacinamide Riboflavin To identify the vitamins identity, the two trainees separated their sample into two equal portions and performed two separate tests: [a.] Engr. Mayo used the flame atomic absorption spectrophotometer in order to identify the elemental composition of the sample which happens to be 59.0% C, 5.0% H and 22.9% N by mass [b.] Engr. Busog on the other hand mixed his 3.88 g sample with 30.0 mL of nitrobenzene, C,H5NO2 (Latent Heat of Fusion = 79.81 J/g). Using Beckmann's method, he determined the freezing point depression to be 7.1 deg C. Based on the tests…
21. A 220 lb patient needs 0.2 mEq Ca++/kg/hour for hypocalcemia. How many grams of calcium ion (MW = 40 g/mol) will the patient receive in 2.5 hours?
(3) A container holding NO2 and CO gas will lose NO2 gas via the reaction NO2 (g) + CO (g) → NO (g) + CO2 (g) A chemist measures the [NO2] over time and finds that plotting 1/[NO2 ] versus time yields a straight line with a slope of 3.56×10-2 M-1·s-1. If the container originally held 1.00 M NO2, what is the concentration of NO2 after 1.50 hour [NO2]1.5 hrs = ___________ How long will it take the [NO2] to drop to 20% of its initial concentration of 1.00 M? T20% = __________
Calculate the cell potential for the galvanic cell in which the given reaction occurs at 25 °C, given that [Sn2+] = 0.0564 M, [Fe+] = 0.0453 M, [Snª+] = 0.00585 M, and [Fe²+] = 0.01002 M. Standard reduction potentials can be found in this table. Sn²+ (aq) + 2 Fe³+(aq) = Snt+(aq) + 2 Fe²+(aq) E = 0.4478 V
23 24 25 26 27 28 A chemist prepares a solution of mercury(II) lodide (HgI,) by measuring out 0.00033 umol of mercury(II) iodide into a 150. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in umol/L of the chemist's mercury(II) iodide solution. Round your answer to 2 significant digits. H mol L. Submit ontinue
4:00 -5:20 pm CHEM2101 QUIZ WEEK 4 8 OCTOBER, 2020 WRITE ONLY YOUR ANSWERS IN BLUE OR BLACK INK DO NOT COPY THE QUESTIONS NUMBER YOUR ANSWERS CORRECTLY TO AGREE WITH THE NUMBERING OF THE QUESTIONS QUESTION 1: What are the physical properties of each of the following substances? arwa (a) copper(II) nitrate (b) sulfur (c) honey (d) drinking water QUESTION 2: What does the following picture show? S
How long would it take, in minutes indium 117 to decrease from 84.0 mg to 10.5 mg
Why is lead(Pb) connected with chemistry and biology?