Give the structure of one of the isomers formed when 1−methylcyclopentene reacts with bromine in water. Indicate relative stereochemistry where appropriate.

Achemistry student weighs out of phosphoric acid , a triprotic acid, into a volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with solution. calculate the volume of solution the student will need to add to reach the final equivalence point. round your answer to significant digits.

Two things that biomedical has invented or innovated

What element breaks down into yttrium-90?