Multiple Choice
Phosphorus-32 is a radioactive isotope used in many biomedical applications.How much phosphorus-32 was originally used if there is only 3.50 mg left in a sample after 288 h? (The half-life of phosphorus-32 is 14.3 days.)
A) 1.96 mg
B) 6.26 mg
C) 4.17 mg
D) 7.00 mg
E) 17.9 mg
Correct Answer:

Verified
Correct Answer:
Verified
Q13: Which has the lowest boiling point?<br>A)H<sub>2</sub>S<br>B)H<sub>2</sub>O<br>C)H<sub>2</sub>Te<br>D)H<sub>2</sub>Se<br>E)H<sub>2</sub>Po
Q14: The fluoride ion F- is important in
Q15: Zinc oxide, a combination of zinc and
Q17: The concentration of chloride in the human
Q19: Which of the following is NOT a
Q21: Which element forms an ionic compound with
Q22: Selenocysteine is an amino acid that
Q23: What is a stimulatory effect, and what
Q40: Arrange the first four halogens in order
Q59: The concentration of a major essential element