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Ne4ueva [31]
3 years ago
8

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. Subtract the electr

onegativities for the following pairs of elements and predict whether they form a covalent bond.
Electronegativity difference of C and C:

ionic

covalent
Electronegativity difference of Mg and Cl:

ionic

covalent
Chemistry
2 answers:
kenny6666 [7]3 years ago
5 0
Covalent and for mg cl ionic
velikii [3]3 years ago
4 0

Answer:

Electronegativity difference of C and C: 0.0

covalent

Electronegativity difference of Mg and Cl: 1.8

ionic

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332 mL of phosphorus vapour weighs 0.155 g at 527 °C and 1bar pressure. What is the molar mass of phosphorus?
matrenka [14]

Answer:

124.98

Explanation:

The molar mass of phosphorus, M=PVwRT=1×34.05×10−30.0625×0.08314×819=124.98.

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4 years ago
Suppose you have a crystal composed of elements X and Y in which the radius ratio is approximately ½, so that the sodium chlorid
WINSTONCH [101]

Answer:

XY would have a higher melting point than NaCl.

Explanation:

The electrostatic force (F) between ions in an ionic lattice can be estimated using Coulomb's Law.

F=k.\frac{q_{1}.q_{2}}{r^{2} }

where,

k is the Coulomb's constant

q₁ and q₂ are the charges of the ions

r is the distance between the ions

X⁺⁺ and Y⁻⁻ are doubly charged with respect to Na⁺ and Cl⁻ so the force between them is 4 times the force between Na⁺ and Cl⁻. Since the force is stronger, it would require more energy to break it to take it to the liquid state, so a higher melting point is expected.

7 0
3 years ago
What theory states that the particles of a gas are in constant random motion and that they constantly collide with each other an
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The Kinetic Molecular Theory has 5 main tenets, and they basically explain that the gas molecules are in constant motion. It is random and it causes constant collisions between the particles and also with the container's walls.

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3 0
1 year ago
When the following oxidation-reduction occurs, what is the balanced reduction half-reaction after the electrons in both half rea
Lostsunrise [7]

Answer :  The balanced reduction half-reaction is:

3Cu^{2+}+6e^-\rightarrow 3Cu

Explanation :

Redox reaction or Oxidation-reduction reaction : It is defined as the reaction in which the oxidation and reduction reaction takes place simultaneously.

Oxidation reaction : It is defined as the reaction in which a substance looses its electrons. In this, oxidation state of an element increases. Or we can say that in oxidation, the loss of electrons takes place.

Reduction reaction : It is defined as the reaction in which a substance gains electrons. In this, oxidation state of an element decreases. Or we can say that in reduction, the gain of electrons takes place.

The given balanced redox reaction is :

Al(s)+Cu^{2+}(aq)\rightarrow Al^{3+}(aq)+Cu(s)

The half oxidation-reduction reactions are:

Oxidation reaction : Al\rightarrow Al^{3+}+3e^-

Reduction reaction : Cu^{2+}+2e^-\rightarrow Cu

In order to balance the electrons, we multiply the oxidation reaction by 2 and reduction reaction by 3 and then added both equation, we get the balanced redox reaction.

Oxidation reaction : 2Al\rightarrow 2Al^{3+}+6e^-

Reduction reaction : 3Cu^{2+}+6e^-\rightarrow 3Cu

The balanced redox reaction will be:

2Al(s)+3Cu^{2+}(aq)\rightarrow 2Al^{3+}(aq)+3Cu(s)

Thus, the balanced reduction half-reaction is:

3Cu^{2+}+6e^-\rightarrow 3Cu

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C because minerals contain sodium
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