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KatRina [158]
3 years ago
7

Why does magnesium fluoride has a higher melting point than fluorine and carbon tetrafluoride?

Chemistry
1 answer:
Fofino [41]3 years ago
4 0
<span>Magnesium Flouride is made up of ionic bonds, so a high melting point.
Where as fluorine and Carbon Tetrachloride is made up of covalent bonds, so only weak bonds and low melting point.</span>
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At 66.0 ∘c , what is the maximum value of the reaction quotient, q, needed to produce a non-negative e value for the reaction so
andreev551 [17]

Answer:

\boxed{5.5 \times 10^{-28}}

Explanation:

We must use the Nernst equation

E = E^{\circ} - \frac{RT}{zF}\ln Q

Step 1. Calculate E°

SO₄²⁻(aq) + 4H⁺(aq) + 2e⁻ ⇌ SO₂(g) + 2H₂O(ℓ)

<u>2Br⁻⇌ Br₂(aq) + 2e⁻                                                                </u>

SO₄²⁻(aq) + 4H⁺(aq) + 2Br⁻(aq) ⇌ Br₂(aq) + SO₂(g) + 2H₂O(ℓ)

E° = 0.17 - 1.0873 = -0.92 V

Step 2. Calculate Q

E   =  0      V

E° = -0.92 V

R = 8.314 J·K⁻¹mol⁻¹

T = 66 °C

n = 2

F = 96 485 C/mol

Calculations:  

T = 66.0 + 273.15 = 339.15 K

0 = -0.92 - \dfrac{8.314 \times 339.15}{2 \times 96 485}\ln Q\\\\0.92 = -0.0146\times \ln Q \\\\\ln Q = -\dfrac{0.92}{0.0146} = -62.8\\\\Q = e^{-62.8} =\boxed{5.5 \times 10^{-28}}\\

6 0
4 years ago
33.1 x 105 <br> What is the scientific notation
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Answer:

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Explanation:

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4 years ago
Which two factors often determine the type of rock that is formed by a process?
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The chemical composition of the magma and the rate at which it cools determine what rock forms. Igneous rocks can cool slowly beneath the surface or rapidly at the surface. These rocks are identified by their composition and texture.

Hope this help XD

4 0
3 years ago
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The mass percentage of hydrochloric acid within a solution is 15.00%. given that the density of this solution is 1.075 g/ml, fin
Morgarella [4.7K]

Given the mass percentage of HCl solution = 15.00 %

This means that 15.00 g HCl is present in 100 g solution

Moles of HCl = 15.00 gHCl*\frac{1 mol HCl}{36.46 g HCl} =0.411molHCl

Density of the solution = 1.075 g/mL

Calculating the volume of solution from density and mass:

100 g *\frac{1mL}{1.075 g} =93.0 mL

Converting volume from mL to L:

93.0 mL * \frac{1 L}{1000 mL} =0.093 L

Calculating the molarity of HCl solution from moles and volume:

\frac{0.411 mol}{0.093 L} =4.42 mol/L

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vesna_86 [32]

Answer:

impurities

Explanation:

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