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viktelen [127]
2 years ago
14

What is the oxidation number of the element Se

Physics
1 answer:
maria [59]2 years ago
6 0

Answer:

The oxidation number of a monatomic (composed of one atom) ion is the same as the charge of the ion. For example, the oxidation numbers of K+, Se2−, and Au3+ are +1, -2, and +3, respectively. The oxidation number of oxygen in most compounds is −2.

Explanation:

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zero.

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Explanation:

Initial moment of inertia of the earth I₁ = 2/5 MR² , M is mss of the earth and R is the radius . If ice melts , it forms an equivalent shell of mass  2.3 x 10¹⁹ Kg

Final moment of inertia I₂ = 2/5 M R² + 2/3  x 2.3 x 10¹⁹ x R²

For change in period of rotation we shall apply conservation of angular momentum law

I₁ ω₁  = I₂ ω₂  ,  ω₁ and   ω₂ are angular velocities initially and finally .

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(2/5 M R² + 2/3  x 2.3 x 10¹⁹ x R²) / 2/5 MR²

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= 1 + 5 / 3  x 2.3 x 10¹⁹ / 5.97 x 10²⁴

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