A 0.4272 g sample of an element contains 2.241 × 10²¹ atoms.What is the symbol of the element? A) In B) Cs C) Sb D) Xe E) Te

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The molar mass of an element is equal to the mass of one mole of the element, which is equal to the number of atoms in one mole of the element multiplied by the mass of one atom of the element. The number of atoms in one mole of an element is equal to Avogadro's number, which is 6.022 × 10²³ atoms/mol. Therefore, the molar mass of an element is equal to the mass of one atom of the element multiplied by Avogadro's number.The molar mass of the element in the question is equal to the mass of the sample divided by the number of atoms in the sample. The mass of the sample is 0.4272 g, and the number of atoms in the sample is 2.241 × 10²¹ atoms. Therefore, the molar mass of the element is equal to 0.4272 g / 2.241 × 10²¹ atoms = 1.90 × 10^-22 g/atom.The molar mass of indium is 114.82 g/mol, which is equal to 1.90 × 10^-22 g/atom. Therefore, the element in the question is indium.

A 04272 G Sample of an Element Contains 2