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mote1985 [20]
3 years ago
14

Which reason best explains why metals are ductile instead of brittle? A.because they have rigid bonds B.because they have flexib

le bonds C.because they easily lose electrons D.because they easily gain electrons HELP ASAP I AM TAKING THE TEST RIGHT NOW, I GOT 10 MIN LEFT!! (BIG 30 POINTS)
Chemistry
2 answers:
pav-90 [236]3 years ago
7 0

B.

Explanation:

Because the delocalised electrons are free to move.

Metallic bonds are formed by the electrostatic attraction between the positively charged metal ions, which form regular layers, and the negatively charged delocalised electrons. These are the electrons which used to be in the outer shell of the metal atoms. These delocalised electrons are free to move throughout the giant metallic lattice, so as one layer of metal ions slides over another, the electrons can move too keeping the whole structure bonded together.

This is the opposite of what happens in a giant ionic lattice, where both the positive ions and the negative ions are locked in place. If the crystal is stressed and one layer moves with respect to another, the positive ions can end up lined up with each other, and the negative ions lined up with each other. This causes repulsion, so the crystal fractures.

Sedaia [141]3 years ago
4 0

Answer:

B.

Explanation:

Because the delocalised electrons are free to move.

Metallic bonds are formed by the electrostatic attraction between the positively charged metal ions, which form regular layers, and the negatively charged delocalised electrons. These are the electrons which used to be in the outer shell of the metal atoms. These delocalised electrons are free to move throughout the giant metallic lattice, so as one layer of metal ions slides over another, the electrons can move too keeping the whole structure bonded together.

This is the opposite of what happens in a giant ionic lattice, where both the positive ions and the negative ions are locked in place. If the crystal is stressed and one layer moves with respect to another, the positive ions can end up lined up with each other, and the negative ions lined up with each other. This causes repulsion, so the crystal fractures.

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Explain why specific gravity is dimensionless
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What is the mass of sodium (Na) in 50 grams of table salt (NaCl)? Show your work.
Margaret [11]

Answer:

19 g

Explanation:

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Amount of sodium (Na) = ?

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Percent of sodium (Na) = 23 / 58.5 x 100

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The acid dissociation constant Ka equals 1.26 × 10–2 for HSO4– (acid 1) and is 5.6 × 10–10for NH4+(acid 2). Predict the net dire
marusya05 [52]

Answer:

As K >>> 1, the reaction will shift to the products

Explanation:

To know the direction of any reaction you must calculate the equilibrium constant, K. If K is < 1, the reaction will shift to the reactants and if k > 1 the reaction will shift to the products.

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And:

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The inverse reaction:

<em>NH₃⁺ + H⁺ ⇄ NH₄⁺ 1/Ka = 1.8x10⁹</em>

<em />

The sum of the reactions:

HSO₄⁻ + NH₃⁺ + H⁺ ⇄ NH₄⁺ + SO₄²⁻ + H⁺ K = 1.26x10⁻² ₓ 1.8x10⁹ = 2.3x10⁷

<h3>As K >>> 1, the reaction will shift to the products</h3>
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4 years ago
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