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Zinaida [17]
3 years ago
5

Which answer helps to explain why carbon atoms tend to make 4 covalent bonds? which answer helps to explain why carbon atoms ten

d to make 4 covalent bonds? the valence shell needs 8 electrons. the first electron shell has 4 orbitals. the carbon nucleus has 4 protons. all of the above. none of the above; carbon makes 3 covalent bonds?
Chemistry
2 answers:
Kay [80]3 years ago
8 0

Carbon-12 has the following electron configuration: 1s2-2s2-2p2. As seen in the configuration, the right answer is: the first electron shell has 4 orbitals.


Genrish500 [490]3 years ago
3 0

Carbon atoms tend to make 4 covalent bonds because the valence shell needs 8 electrons. For atoms to be stable, they must have filled outermost energy shells called valence shells. This is called the octet rule. Only noble gases (Group 8) elements have naturally filled valence shells which makes them stable elements. All other atoms tend to lose, gain, or share electrons to get the same electron configuration as these noble gases. Metals easily lose their electrons to non-metals which are readily accepting electrons. The bond that results from this transfer of electrons is called an ionic bond. Non-metals tend to share their electrons with other non-metals forming covalent bonds.

FURTHER EXPLANATION

<em>The first electron shell has 4 orbitals. </em>

<u>FALSE</u> The distribution of the electrons in the carbon atom is shown in the following electron configuration:  

 1s^2 \ 2s^2 \ 2p^2

The coefficients of the letters indicate the electron shell and the superscript tells the how many electrons occupy the orbitals. For carbon there are only two electron shells with electrons: electron shell 1 which has the s orbital and electron shell 2 with the s and three p orbitals.  

Therefore, <u>carbon only has one orbital in the first electron shell. </u>

<u> </u>

<em>The carbon nucleus has 4 protons. </em>

<u>FALSE</u> The number of protons in an atom gives it its unique identity. The proton count is given by the atomic number. The atomic number of C is 6. Therefore, <u>it has 6 protons in its nucleus. The atom with 4 protons is Beryllium (Be). </u>

<em>All of the above</em>

<u>FALSE </u> Two statements above are not true.

<em>Carbon makes 3 covalent bonds </em>

<u>FALSE</u> <u>Carbon forms 4 covalent bonds</u> because it can share 4 unpaired electrons with other atoms. It may form single, double. Or triple covalent bonds with other C atoms.

LEARN MORE  

• Ionization Energy brainly.com/question/2153804

• Atomic Number brainly.com/question/1446926

• Ionic Compound brainly.com/question/7007192

Keywords: octet rule, valence electrons, electron configuration

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f 65mL of sulfuric acid and 25mL of sodium hydroxide were mixed and the solution had a density of 1.01g/mL, what is the heat of
user100 [1]

The question is incomplete, here is the complete question:

If 65 mL of sulfuric acid and 25 mL of sodium hydroxide were mixed and the solution had a density of 1.01 g/mL, What is the heat of the calorimeter in kJ given the temperature change of the above equation is -5.5 K. You may assume the solution has a heat capacity of 4.180 J/gK. Express your final answer in kJ and with 2 decimal places

<u>Answer:</u> The heat of the calorimeter is 2.09 kJ

<u>Explanation:</u>

To calculate the mass of solution, we use the equation:

\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}

Density of solution = 1.01 g/mL

Volume of solution = [65 + 25] mL = 90 mL

Putting values in above equation, we get:

1.01g/mL=\frac{\text{Mass of solution}}{90mL}\\\\\text{Mass of solution}=(1.01g/mL\times 90mL)=90.9g

To calculate the heat released by the reaction, we use the equation:

q=mc\Delta T

where,

q = heat released

m = mass of solution = 90.9 g

c = heat capacity of solution = 4.180 J/g.K

\Delta T = change in temperature = -5.5 K

Putting values in above equation, we get:

q=90.9g\times 4.180J/g.K\times (-5.5K)=-2089.8J=-2.09kJ

Heat released by the solution will be equal to the heat absorbed by the calorimeter.

<u>Sign convention of heat:</u>

When heat is absorbed, the sign of heat is taken to be positive and when heat is released, the sign of heat is taken to be negative.

Heat absorbed by the calorimeter = -(-2.09) = 2.09 kJ

Hence, the heat of the calorimeter is 2.09 kJ

8 0
4 years ago
From a scientific viewpoint, why do many desert dwellers elect to wear white or light-colored garments
alexandr1967 [171]
Darker colors absorb sunlight more, so it will become hotter. Lighter colored clothes will better reflect sun so they will be less hot.

Hope that helped
7 0
3 years ago
A lead–tin alloy of composition 30 wt% Sn–70 wt% Pb is slowly heated from a temperature of 150°C (300°F).(a) At what temperature
Novay_Z [31]

Answer:

a) 231.9 °C

b) 100% Sn

c) 327.5 °C

d) 100% Pb

Explanation:

This is a mixture of two solids with different fusion point:

Tf_{Pb}=327.5 C

Tf_{Sn}=231.9 C

<u>Given that Sn has a lower fusion temperature it will start to melt first at that temperature. </u>

So the first liquid phase forms at 231.9 °C and because Pb starts melting at a higher temperature, that phase's composition will be 100% Sn.

The mixture will be completely melted when you are a the higher melting temperature of all components (in this case Pb), so it will all in liquid phase at 327.5 °C.

At that temperature all Sn was already in liquid state and, therefore, the last solid's composition will be 100% Pb.

3 0
4 years ago
Chlorine has 7 valence electrons. With what group of elements will chlorine most readily bond?
scZoUnD [109]

Answer:

group 1

Explanation:

chlorine donate electron

8 0
3 years ago
Answer fast plzzzzzzzz
viva [34]

Answer:

2nd and 3rd

Explanation:

5 0
3 years ago
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