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3 years ago

5

To form an oxygen molecule o2 two oxygen atoms share two pairs of electrons what kind of bond is shown below by the electron dot

diagram of o2

2 answers:

Alexus [3.1K]3 years ago

7 0

They have a Covelant bond

Dima020 [189]3 years ago

4 0

it is a covalent bond.

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Could you please help me with this

Reptile [31]

Answer:

Chemical equation:

Sr + S → SrS

Explanation:

Mg react with sulfur and form magnesium sulfate.

Chemical equation:

Mg + S → MgS

The oxidation state of magnesium is +2 it loses its two valance electrons while sulfur gain two electrons to complete the octet. That's why one atom of magnesium combine with one atom sulfur.

Chemical equation:

Sr + S → SrS

The oxidation state of strontium is +2 it loses its two valance electrons while sulfur gain two electrons to complete the octet. That's why one atom of strontium combine with one atom sulfur.

8 0

4 years ago

Using the data: C2H4(g), = +51.9 kJ mol-1, S° = 219.8 J mol-1 K-1 CO2(g), = ‑394 kJ mol-1, S° = 213.6 J mol-1 K-1 H2O(l), = ‑286

ra1l [238]

Answer:

The correct answer is 1332 KJ.

Explanation:

Based on the given information,

ΔH°f of C2H4 is 51.9 KJ/mol, ΔH°O2 is 0.0 KJ/mol, ΔH°f of CO2 is -394 KJ/mol, and ΔH°f of H2O is -286 KJ/mol.

Now the balanced equation is:

C2H4 (g) + 3O2 (g) ⇔ 2CO2 (g) + 2H2O (l)

ΔH°rxn = 2 × ΔH°f CO2 + 2 × ΔH°fH2O - 1 × ΔH°fC2H4 - 3×ΔH°fO2

ΔH°rxn = 2 (-394) + 2(-286) - 1(51.9) - 3(0)

ΔH°rxn = -1411.9 KJ

Now, the given ΔS°f of C2H4 is 219.8 J/mol.K, ΔS°f of O2 is 205 J/mol.K, ΔS°f of CO2 is 213.6 J/mol.K, and ΔS°f of H2O is 69.96 J/mol.K.

Now based on the balanced chemical reaction,

ΔS°rxn = 2 × ΔS°fCO2 + 2 ΔS°fH2O - 1 × ΔS°f C2H4 - 3 ΔS°fO2

ΔS°rxn = 2 (213.6) + 2(69.96) - 1(219.8) -3(205)

ΔS°rxn = -267.68 J/K or -0.26768 KJ/K

T = 25 °C or 298 K

Now putting the values of ΔH, ΔS and T in the equation ΔG = ΔH-TΔS, we get

ΔG = -1411.9 - 298.0 × (-0.2677)

ΔG = -1332 KJ.

Thus, the maximum work, which can obtained is 1332 kJ.

6 0

3 years ago

The melting point of the metal potassium is 63.5c, while that of titanium is 1660c. what explanation can be given for this great

kiruha [24]

The melting point of potassium = $63.5^{0}C$

Melting point of titanium = $1660^{0}C$

Titanium has a stronger metallic bonding compared to potassium. Titanium being a transition metal has greater number of valence electrons (4 valence electrons) contributing to the valence electron sea compared to potassium which has only one valence electron. The atomic size of Titanium much lower than that of potassium, so the bonding between Titanium atoms is stronger than that of potassium. Hence, the melting point of Titanium is much higher than that of potassium.

3 0

4 years ago

Water has a density of 1.0 g/mL. Which of these objects will float in water

Firdavs [7]

Answer:where did you get this

Explanation:

3 0

3 years ago

How many electrons are there in second principal energy<br> level(n=2) of a phosphorus atom?

salantis [7]

Answer:

8 electrons

Explanation:

Phosphorous is the element of group 15 and third period. The atomic number of chlorine is 15 and the symbol of the element is P.

The electronic configuration of the element phosphorus is:-

$1s^22s^22p^63s^23p^3$

Thus, from the electronic configuration shown above,

In n = 2, the total number of electrons are 8 which are present in $2s^22p^6$

6 0

3 years ago