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devlian [24]
3 years ago
9

1. The valence electrons of representative elements are

Chemistry
1 answer:
vagabundo [1.1K]3 years ago
3 0

Answer:

a) located in the outermost energy level.

Explanation:

A valence electron is an electron in the outer shell associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.

Hope this helped!

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The acceleration of this ball
GalinKa [24]

Answer: What ball

Explanation:

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4 years ago
An (blank) determines what will be tested in a scientific experiment
elixir [45]
The answer would be hypotheis since its an theory that isnt proven yet which would involve a scientist to expertiment to make the hypothesis true or valid
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4 years ago
What entropy change is associated with the reversible phase change from 1.0kg of ice to water at 0 ° C?
avanturin [10]

Answer:

1200 J/K  

Explanation:

The formula for the entropy associated with a reversible phase change is

\Delta S= \dfrac{q_{\text{rev}}}{T}

1. Calculate q

For a reversible phase change like melting,

q_{\text{rev}} = m\Delta_{\text{fus}}H = \text{1000 g} \times \dfrac{\text{334 J}}{\text{1 g}} = \text{334 000 J}

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3 0
3 years ago
At 800 K, the equilibrium constant, Kp, for the following reaction is 3.2 × 10–7. 2 H2S(g) ⇌ 2 H2(g) + S2(g) A reaction vessel a
djverab [1.8K]

Answer:

0.008945 atm

Explanation:

In the reaction:

2H2S(g) ⇌ 2 H2(g) + S2(g)

Kp is defined as:

Kp = P_{H_{2}}^2P_{S_{2}} / P_{H_{2}S}^2

<em>Where P is the pressure of each compound in equilibrium.</em>

If initial pressure of H2S is 3.00atm, concentrations in equilibrium are:

H2S = 3.00 atm - 2X

H2 = 2X

S2: = X

Replacing:

3.2x10^{-7} = (2X)^2X / (3-2X)^2

3.2x10^{-7} = 4X^3 / 9- 6X+4X^2

0 = 4X³ - 1.28x10⁻⁶X² + 1.92x10⁻⁶X - 2.88x10⁻⁶

Solving for X:

X = 0.008945 atm

As in equilibrium, pressure of S2 is X, <em>pressure is 0.008945 atm</em>

7 0
3 years ago
The question is "How does the absorption and release of energy affect temperature change during a chemical reaction?" I need to
sergeinik [125]
If the heat is absorbed, then the temperature will increase as well.
3 0
4 years ago
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