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Final answer:The mass of a single boron atom is approximately 10 amu or 11 amu, depending on the isotope.Explanation:The molar mass of boron is 10.81 g/mole, but the mass of a single boron atom cannot be exactly 10.81 g. The molar mass represents the average mass of all boron atoms, which may have slightly different masses due to isotopes. Boron is composed of two isotopes, ¹0B and ¹¹B, with masses of approximately 10 amu and 11 amu, respectively. Therefore, the mass of a single boron atom is not exactly 10.81 g/mole, but ratherapproximately10 amu or 11 amu depending on the isotope.Learn more about boron atom's mass here:brainly.com/question/34472740#SPJ12...