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2 years ago

Which substance would have the highest melting point, based on electronegativity

Chemistry

2 answers:

Leni [432]2 years ago

8 0

<h2>Answer:</h2>

The substance with high electronegativity difference have high melting point.

<h3>Explanation:</h3>

Electronegativity:

It is a measure of the tendency of an atom to attract a bonding pair of electrons.

Higher the electronegativity higher the potential to attract electron pair.
So element with high electronegativity difference in elements tend to acquire the partial ions, attracting each other strongly.
Hence more strong bonds substances would have highest melting points.

dsp732 years ago

7 0

Electronegativity is the ability of an element to attract electrons towards itself during bonding. Compounds with a metal and nonmetal that have a great electronegativity difference would result to a much stronger intermolecular force. Its effect on the melting point is to increase it further because it takes greater energy to break these bonds. <em>So, the higher the electronegativity difference, the higher the melting point.</em>

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Give the correct balanced equation for the single replacement reaction of magnesium with aluminum oxide. A) Mg + AlO → MgO + Al

solniwko [45]

Answer is "C".

<em><u>Explanation
</u></em>
Single replacement reaction is a type of reaction which one reactant reacts with another and makes a product by replacing one element by another.

Mg (Magnesium) reacts with Al₂O₃ (Aluminium oxide) and produces MgO (Magnesium oxide) and Al (Aluminium) as products. Here Al is replaced by Mg. Reaction is
Mg + Al₂O₃ → MgO + Al

To balance the reaction equation, both left and right hand sides should have same number of atoms in each element.
Here,
<em>Left Hand Side has </em> <em>Right Hand Side has</em>
Mg = 1 atom Mg = 1 atom
Al = 2 atom Al = 1 atom
O = 3 atom O = 1 atom

First step : balance the O atoms in both sides. To do that "3" should be added before MgO.

Second step : After balancing O atoms, there will be 3 Mg atoms in right hand side. Hence to balance Mg atoms again "3" should be added before Mg in left hand side

Third step : as the final step balance the Al atoms by adding "2" before Al in the right hand side.

Then final balanced equation should be
3Mg + Al₂O₃ → 3MgO + 2Al

4 0

2 years ago

Read 2 more answers

A 700.0 mL gas sample at STP is compressed to a volume of 200.0 mL, and the temperature is increased to 30.0°C. What is the new

dolphi86 [110]

Answer: The new pressure of the gas in Pa is 388462

Explanation:

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

where,

$P_1$ = initial pressure of gas at STP = $10^5Pa$

$P_2$ = final pressure of gas = ?

$V_1$ = initial volume of gas = 700.0 ml

$V_2$ = final volume of gas = 200.0 ml

$T_1$ = initial temperature of gas = 273 K

$T_2$ = final temperature of gas = $30^oC=273+30=303K$

Now put all the given values in the above equation, we get:

$\frac{10^5\times 700.0ml}{273K}=\frac{P_2\times 200.0ml}{303K}$

$P_2=388462Pa$

The new pressure of the gas in Pa is 388462

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2 years ago

Convert each into decimal form.<br>a) 1.56× 10^3<br>b) 0.56×10-4

Lera25 [3.4K]

Answer: A = 1560

B = 1.6

Explanation: brainlest please

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Murljashka [212]

Answer:

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