An extraterrestrial mineral sample recovered from a carbonaceous chondrite meteorite contains a non-standard isotopic distribution of boron. Mass spectrometry analysis reveals that the boron in this sample consists of 18.43% boron-10 and 81.57% boron-11.
Calculate the relative atomic mass (ArA_rAr) of boron in this meteorite sample. Give your answer to two decimal places. You must show your working.
87 exam-style questions on Edexcel GCSE Chemistry 2.1 Atomic structure, covering 2.1.1 Development of the atomic model, 2.1.2 Structure of the atom and subatomic particles, 2.1.3 Mass number, isotopes and relative atomic mass, and 2.1.4 Calculating relative atomic mass from isotopic abundance. Each one has a worked solution and a mark scheme showing where the marks go.