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3 years ago

Why is there such a large jump and ionization energy between the second and third ionization energy‘s for magnesium?

1 answer:

5 0

The second ionization energy of Mg is larger than the first because it always takes more energy to remove an electron from a positively charged ion than from a neutral atom. The third ionization energy of magnesium is enormous, however, because the Mg2+ ion has a filled-shell electron configuration.

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Diethyl ether (C2H5 )2O vaporizes at room temperature. If the vapor exerts a pressure of 233 mm Hg in a flask at 25 °C, what is

Svet_ta [14]

Answer: The density of the given vapor is 0.939 g/L.

Explanation:

Given: Pressure = 233 mm Hg (1 mm Hg = 0.00131579 atm) = 0.31 atm

Temperature = $25^{o}C$ = (25 + 273) K = 298 K

According to the ideal gas equation,

$PV = \frac{m}{M}RT$

where,

P = pressure

V = volume

m = mass

M = molar mass

R = gas constant = 0.0821 L atm/mol K

T = temperature

This formula can be re-written as follows.

$PM = \frac{m}{V}RT$ (where, $Density = \frac{mass (m)}{Volume (V)}$ )

Hence, formula used to calculate density of diethy ether (molar mass = 74.12 g/mol) vapor is as follows.

$d = \frac{PM}{RT}$

Substitute values into the above formula as follows.

$d = \frac{PM}{RT}\\= \frac{0.31 atm \times 74.12 g/mol}{0.0821 L atm/mol K \times 298 K}\\= \frac{22.9772}{24.4658}\\= 0.939 g/L$

Thus, we can conclude that the density of the given vapor is 0.939 g/L.

6 0

4 years ago

Which chemical equation correctly represents the synthesis of calcium sulfite from calcium oxide and sulfur dioxide?

OverLord2011 [107]

The chemical equation that correctly represents the synthesis of calcium sulfite is

CaO(s) + SO₂(g) → CaSO₃(s)

Explanation

Synthesis reaction is type of chemical reaction in which two or more simple substance combine to form a more complex product.

The reaction above is therefore a synthesis reaction since CaO and So₂ combine to form CaCO₃ ( a complex product)

5 0

3 years ago

Read 2 more answers

Chris noticed a high-pressure system in the weather forecast for Monday

Alchen [17]

Answer:

A. Clear and Sunny

Explanation:

The answer would be A. Clear and Sunny. A high pressure system occurs where the air mass above the Earth is denser than in surrounding areas, and therefore exerts a higher force or pressure. They usually happen with li9ght winds. Using process of elimination, it could not be D. Warm and Stormy, C. Cloudy and Rainy, or B. Cold and Stormy because all have wet climates.

5 0

2 years ago

The equilibrium constant is given for two of the reactions below. Determine the value of the missing equilibrium constant. A(g)

wolverine [178]

Answer:

The correct answer is 8.10

Explanation:

Given:

A(g) + 2B(g) ↔ AB₂(g) Kc = 59 ---- Eq. 1

A(g) + 3B(g) ↔ AB₃(g) Kc = 478 ----- Eq. 2

We have to rearrange the chemical equations in order to obtain:

AB₂(g) + B(g) ↔ AB₃(g) Kc = ?

AB₂(g) is a reactant, so we have to use the reverse reaction of Eq. 1, in this case Kc= 1/59. Since AB₃(g) is a product, we use the forward reaction of Eq.2, and the constant is the same: Kc= 478. The following is the sum of rearranged chemical equations, and the compounds in bold and italic are canceled:

AB₂(g) ↔ A(g) + 2B(g) Kc₁= 1/59

A(g) + 3B(g) ↔ AB₃(g) Kc₂= 478

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

AB₂(g) + B(g) ↔ AB₃(g)

If we add reactions at equilibrium, the equilibrium constants Kc are mutiplied as follows:

Kc = Kc₁ x Kc₂ = 1/59 x 478 = 478/59 = 8.10

The value of the missing equilibrium constant is 8.10.

6 0

3 years ago

Describe how a crystal of alum differs from a crystal of potassium aluminum sulfate

laiz [17]

An alum is a double salt where you have a trivalent metal sulfate and a monovalent metal sulfate. Meanwhile, a crystal of potassium aluminum sulfate is potash alum!

7 0

3 years ago

Why is there such a large jump and ionization energy between the second and third ionization energy‘s for magnesium￼?

Why is there such a large jump and ionization energy between the second and third ionization energy‘s for magnesium?