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3 years ago

What happens when the compound NaCl is formed?

Chemistry

2 answers:

stepladder [879]3 years ago

7 0

Answer:

Explanation:

This kind of bond is known as an ionic bond and is based on electrostatic forces between two charged molecules/atoms. To achieve stable configuration, sodium (2.8.1) transfers its valence electron to chlorine that also needs one electron to achieve stable configuration (2.8.8), and combine in an ionic bond.

Stels [109]3 years ago

4 0

<u>Answer:</u> The correct answer is Option A.

<u>Explanation:</u>

Sodium is the 11th element of the periodic table having electronic configuration of $[Ne]3s^1$

This element will loose 1 electron in order to attain stability and will form $Na^+$ ion.

Chlorine is the 17th element of the periodic table having electronic configuration of $[Ne]3s^23p^5$

This element will gain 1 electron in order to attain stability and will form $Cl^-$ ion.

These two elements form ionic compound by transferring of electrons from sodium atom to chlorine atom.

Hence, the correct answer is Option A.

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Lily is trying to measure the volume of her hand. She places it in a can full of water. The volume of water that is __________ i

PolarNik [594]

Answer:

Displaced

Explanation:

A convenient way to measure the volume of an object is to measure the volume of a solid is to immerse the solid into water.

When a solid is immersed in water, it displaces some volume of water. This volume of water displaced is the same as the volume of the object.

For instance, if the volume of water in a measuring cylinder was 25 ml and i added a stone which made the water in the measuring cylinder to rise to 70 ml, it simply means that the volume of the object is 70 ml - 25 ml = 45 ml

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3 years ago

Which element have the formula C6H12O6?

nadya68 [22]

Answer: Glucose is a simple sugar with six carbon atoms and one aldehyde group.

Explanation: hope this helps you

4 0

3 years ago

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If the freezing point of a soda is – 4.5 ºC and you leave it in your car overnight when the temperature dips to 25 ºF, will the

Sveta_85 [38]

Explanation:

We leave a soda in the car overnight and the temperature dips to 25 °F. To see if it will freeze we have to convert the °F to °C.

T(°C) = ( T(°F) - 32 ) *5/9

T(°C) = (25 - 32) *5/9

T(°C) = -3.9 °C

Since -3.9 °C is a temperature greater than the freezing point (-4.5 °C) the soda won't freeze.

Answer: The soda won't freeze.

6 0

2 years ago

Which statement is true about a proton and a neutron?

igor_vitrenko [27]

the right one to this would be they have different masses and different charges as a proton has a mass that is less then that of a neutron and has a positive charge vs the is neutral charge of the neutron

4 0

4 years ago

By using the following reactions, calculate the heat of formation of pentane (C5H12) gas from carbon and hydrogen gas. C (s) + O

Llana [10]

Answer: ΔH = 145 kJ/mol

Explanation:

1) Equations given:

C (s) + O₂ (g) → CO₂ (g), ΔH = 395 kJ/mol

H₂ (g) + 1/2O₂ (g) → H₂O (l), ΔH = 285 kJ/mol

C₅H₁₂ (g) + 8O₂ → 5CO₂ (g) + 6H₂O (l), ΔH = 3.54 × 10³ kJ/mol

2) Target equation:

5C(s) +6 H₂(g) → C₅H₁₂(g)

3) Hess law

As per Hess law you can handle the chemical equations (add, subtract, reverse, multiply by a coefficient) to find the target equation, and then the net sum of the heat changes of the individual reactions equals the heat change of the target reaction.

4) Now, you must figure out how to transform the individual reactions to end up with the final equation:

Here is how:

i) Multiply the first one by 5:

5C (s) + 5O₂ (g) → 5CO₂ (g), ΔH = 5×395 kJ/mol

ii) Multiply the second by 6:

6H₂ (g) + 3O₂ (g) → 6H₂O (l), ΔH = 6×285 kJ/mol

iii) Reverse the third:

5CO₂ (g) + 6H₂O (l) → C₅H₁₂ (g) + 8O₂ , ΔH = - 3.54 × 10³ kJ/mol

iv) Add them up:

5C (s) + 5O₂ (g) → 5CO₂ (g), ΔH = 5×395 kJ/mol

6H₂ (g) + 3O₂ (g) → 6H₂O (l), ΔH = 6×285 kJ/mol

5CO₂ (g) + 6H₂O (l) → C₅H₁₂ (g) + 8O₂ , ΔH = - 3.54 × 10³ kJ/mol

----------------------------------------------------------------------------------------------

5C (s) + 6H₂ → C₅H₁₂ (g),

ΔH = 5×395 kJ/mol + 6×285 kJ/mol - 3.54 × 10³ kJ/mol

⇒ ΔH = 145 kJ/mol

6 0

4 years ago

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