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belka [17]
4 years ago
6

What 2 tools do we use to measure volume?

Chemistry
2 answers:
LuckyWell [14K]4 years ago
5 0
What are the answer choices? there are multiple tooks
choli [55]4 years ago
4 0

Answer:

u

Explanation:

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Aluminum has the electronic configuration 2,8,3. How many valence
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Answer:

3 valence electrons

Explanation:

Because aluminum has three, that means three fluorines can bond. The make the formula AlF3, also known as aluminum trifluoride. Each of the fluorine atoms gets an electron to fill their shell, and the aluminum loses three, giving it a filled shell too (remember, aluminum has three extra electrons).

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3 years ago
True or False: <br><br> Rain is the only form of precipitation that this pollutant takes.​
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I’m not sure probably false

Explanation:

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3 years ago
Read 2 more answers
Why is the value of ea for a spontaneous reaction less than the ea value for the same reaction running in reverse?
Vsevolod [243]

Answer and Explanation:

  • In spontaneous reactions, activation energy (Ea) of the forward reaction is less than that for the same reaction running in the reverse direction.
  • Firstly, The activation energy <em>is the minimum energy requirement for the reacting molecules to initiate the reaction.</em> <em>It is the potential energy difference between the activated complex and the reactants on the energy profile diagram.</em>
  • Spontaneous reactions are mainly exothermic reactions and are represented on the energy profile diagram as shown in <em>the attached image.</em>
  • <u><em>The forward reaction looks like: </em></u>Reactants (A) → products (B) + heat

As the spontaneous reaction (exothermic), the energy of the products is lower than that of the reactants.

The difference in energy between reactants and products is the enthalpy change of the reaction (ΔH).

The activation energy (Ea) of the forward direction is the difference between  the energy of the the activated complex state and the reactants state.

  • <u><em>In the case of the reverse direction:</em></u> B + heat → A

In the reverse direction we need a supply of energy because the reaction is converting from a more stable state (low energy) to a lower stable state (high energy).

The supply in the reverse direction is ΔH, the amount of heat released in the forward direction.

Here, the activation energy of the reverse direction will be <em>(Ea of the forward direction + ΔH)</em>.

The difference between the Ea of the reverse and forward direction is ΔH.

Ea reverse = Ea forward + ΔH.

<em>So, in spontaneous reactions, the value of the Ea of forward direction is lower than the same reaction running in the reverse direction.</em>

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4 years ago
If the energy of the reactants is less than
expeople1 [14]
The opposite type of reaction (where energy is taken in from the surroundings of a reaction and thus the energy of the reactants is lower than that of the products) is called an endothermic reaction
7 0
3 years ago
Preston goes on a camel safari in Africa. They he travels 5 km north, then 3 km east.
klasskru [66]
Nice trip I hope he has a lot of fun on that camel
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