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ACS Gen Chem Practice Test 2

10 free ACS Gen Chem practice questions in the real exam format, covering the official content areas, with an explanation for every answer.

ACS Gen Chem Practice Test 2Tutor mode

Question 1 of 10

Atoms

The mass spectrum of element Q is shown. Treating each isotopic mass as equal to its mass number, what is the average atomic mass of Q?

Mass spectrum of element Q020406080100242526Mass number of isotope (m/z for 1+ ions)Relative abundance (%)