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MA_775_DIABLO [31]
3 years ago
10

What information do fossils provide about plants and animals

Chemistry
1 answer:
8_murik_8 [283]3 years ago
4 0

It provides a history on how plants and animals have changed over time

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Onsider the chemical system: H2​(g)+I2​(g)------>2HI(g)
luda_lava [24]

Answer:

The equation  \frac{[HI]^{2} }{[H_{2}[I_{2} ]  } represent

(1) law of mass action

(2) mass action expression

(3) equilibrium constant expression

Explanation:

At a given temperature, the rate of a reaction at a particular instant is proportional to the product of the active masses of the reactants at that instant raised to powers which are numerically equal to the numbers of their respective molecules in the stoichiometric equation describe  the reaction.

3 0
3 years ago
Please please help me!​ please do what you can do and what you understand
ExtremeBDS [4]

Answer:

I don't understand any thing

Explanation:

u help me

6 0
3 years ago
What percentage of the electricity used in the United States is produced by hydroelectric power plants?
lilavasa [31]
13% of total energy ( net energy ) is obtained from renewable sources and about 46% of it comes from hydroelectric power plants.
6 0
3 years ago
An element with the valence electron configuration 4s1 would form a monatomic ion with a charge of_______ . In order to form thi
qwelly [4]

Answer:

+1, lose, 1, 4s, 4s and 3d

Explanation:

<em>An element with the valence electron configuration 4s¹ would form a monatomic ion with a charge of </em><em>+1</em><em>. In order to form this ion, the element will </em><em>lose</em><em> </em><em>1 </em><em>electron from the </em><em>4s </em><em>subshell.</em>

The corresponding oxidation reaction is:

K ⇒ K¹⁺ + 1 e⁻

[Ar] 4s¹ ⇒ [Ar]

<em>If an element with the valence configuration 4s² 3d⁶ loses 3 electrons, these electrons would be removed from the </em><em>4s and 3d</em><em> subshell(s).</em>

The corresponding oxidation reaction is:

Fe ⇒ Fe³⁺ + 3 e⁻

[Ar] 4s² 3d⁶ ⇒ [Ar] 4s⁰ 3d⁵

3 0
3 years ago
A catalyst increases the reaction rate of a reaction by (3 points)
Minchanka [31]

Answer:

A catalyst increases the rate of reaction by decreasing activation energy. ... Enzymes are highly substrate specific and catalyze reactions by providing an alternate pathway of lower activation energy.

Explanation:

I hope this helps :)

5 0
3 years ago
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