Phosphorus-32 has a half-life of 14.0 days. starting with 8.00 g of 32p, how many grams will remain after 112 days ?

a brain scan uses the radioisotope oxygen-15. the recommended dosage is 60 mci . a supply of 220 mci in 40 ml arrives at the lab. how many ml will be injected into a patient?
express your answer to one significant figure and include the appropriate units.

What are the three major branches of natural science? • earth and space science, life science, physical science •earth and space science, physical science, chemistry •physical science, life science, chemistry •life science, chemistry, physics

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a