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Tom [10]
3 years ago
6

Which of the following statements is true about atomic spectra? I. The line spectra of elements are evidence that electron energ

ies are quantized II. Energy is emitted from atoms as they move from lower energy levels to higher energy levels III. Energy is emitted from atoms as they move from higher energy levels to lower energy levels IV. Neutral atoms in the ground state emit light spontaneously
Chemistry
1 answer:
pishuonlain [190]3 years ago
7 0

The line spectra of an atom offers conclusive evidence that electron energies are quantized.

Neils Bohr showed that electrons in an atom can absorb or emit energy when they move from one energy level to another. This principle is the basis upon which the spectra of atoms is built.

The true statements about the atomic spectra is;

  • The line spectra of elements are evidence that electron energies are quantized
  • Energy is emitted from atoms as they move from higher energy levels to lower energy levels

Learn more about atomic spectrum: brainly.com/question/2049494

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The given question is incomplete. The complete question is :

A chemist prepares a solution of barium acetate by measuring out 32 g of barium acetate into a 350 ml volumetric flask and filling the flask to the mark with water. Calculate the concentration in of the chemist's barium acetate solution. Round your answer to significant digits.

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Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

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moles of Ba(CH_3COO)_2 = \frac{\text {given mass}}{\text {Molar mass}}=\frac{32g}{255g/mol}=0.125mol

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