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Evgen [1.6K]
3 years ago
14

How many valence electrons does aluminum have.

Chemistry
1 answer:
Marysya12 [62]3 years ago
4 0

Answer:

3 valence electrons

Explanation:

Aluminum has three valence electrons. Valence electrons are found in the outermost shell of an element and are responsible for its valence.

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Hydrogen is manufactured on an industrial scale by this sequence of reactions: CH2 (g) + H2O(g)=CO (g) + 3H2 (g) K1 CO (g) + H2O
Flauer [41]

Answer:

K = K1×K2 = [CO2] [H2]⁴ / [H₂O]² [CH4]

Explanation:

Based on the reactions:

CH2 (g) + H2O(g) ⇄ CO (g) + 3H2 (g) K1

CO (g) + H2O (g) ⇄ CO2 (g)+H2(g) K2

The sum of both reactions is:

CH4 (g)+2H2O (g) ⇄ CO2(g)+4H2(g) And K of the reaction is: K = K1×K2

K is defined as the ratio between concentrations of products and reactans. Each compound must be elevated to its coefficient in the reaction. That is:

<h3>K = K1×K2 = [CO2] [H2]⁴ / [H₂O]² [CH4]</h3>
4 0
4 years ago
1)Define potential Energy.
Margarita [4]

1. Potential Energy is stored energy a object has when it's not moving.

2. Potential Energy is it's highest on the first stage because as you see the roller coaster is bout to go down the tract which is going to higher the kinetic energy and lower the potential energy.

3. Kinetic Energy is the amount of energy a object has when it's in motion or moving.

4. Kinetic Energy is it's highest in the third stage after it's gone down the tract and potential energy fully decreased and it's at zero.

Remember that potential energy is stored energy so when a object is not moving in this case the roller coaster isn't moving on the first stage when its bout to go down the roller coaster. Kinetic energy is the amount of energy a object has when it's in motion so in this case the third stage would have the highest example of Kinetic energy because it's fully in motion and has no potential energy.

4 0
3 years ago
Because the rock is irregularly shaped, you used the <br> method to measure its volume.
Svetllana [295]

Answer:Displacement method

Explanation:

3 0
3 years ago
CH4 + 2O2 --&gt; CO2 + 2H2O
Tomtit [17]

Answer:

1 mole of CO2 and 2 mole H2O will be produced in the reaction.

Explanation:

N:B: I guess it will be 6 moles of O2 not CO2.

Balanced Equation: CH4 + 2O2 --> CO2 + 2H2O

Given,

1 mole CH4

6 moles of O2

According to Stoichiometry,

In the reaction,

 2 mole O2 reacts with 1 mole CH4

 1 mole O2 reacts with 1/2 mole CH4

∴6 mole O2 reacts with (1/2)*6 mole CH4

                                      = 3 moles of CH4

But, there is only 1 mole CH4 provided. So CH4 is the limiting reagent.

Now,

According to Stoichiometry,

In the reaction,

1 mole CH4 produces 2 moles of H2O

Again,

According to Stoichiometry,

In the reaction,

1 mole CH4 produces 1 mole CO2

So, 1 mole of CO2 and 2 mole H2O will be produced in the reaction.

N:B:[Doing calculation with limiting reagent in problems like these gives you the most accurate answer].

3 0
3 years ago
What happens to the potential energy when heat flows out of a system? Why?
Ann [662]

<span>According the the first of thermodynamics, energy is neither created nor destroyed, energy is simply converted to other forms of energy. So in this case, heat is also a type of energy so when it flows out of the system, therefore this means that some of the initial potential energy was converted to heat and then flowed out of the system. Therefore potential energy will decrease.</span>

5 0
3 years ago
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