Part A\ In a naturally occurring sample,

19.8%

of boron\ atoms have five neutrons and

80.2%

have six\ neutrons.\ What is the mass of a boron atom containing 5 neutrons?\ Express your answer to the nearest whole number.\

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\ Part B\ What is the mass of a boron atom containing 6 neutrons?\ Express your answer to the nearest whole number.\

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\ Request Answer\ Part C\ What is the average mass of the atoms in the drawing?\ Express your answer to eight significant figures.