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scoundrel [369]
3 years ago
15

The basis of the VSEPR model of molecular bonding is __________. Question 1 options: atomic orbitals of the bonding atoms must o

verlap for a bond to form regions of electron density in the valence shell of an atom will arrange themselves so as to maximize overlap electron domains in the valence shell of an atom will arrange themselves so as to minimize repulsions regions of electron density on an atom will organize themselves so as to maximize s-character Question 2 (1 point)
Chemistry
1 answer:
Naddik [55]3 years ago
4 0

Answer:

Electron domains in the valence shell of an atom will arrange themselves so as to minimize repulsions

Explanation:

In accordance with VSEPR theory, the electron domains or electron pairs on the valence shell of the central atom in a molecule always position themselves as far apart in space as possible in order to minimize repulsions.

Recall that according to VSEPR theory, the shape of a molecule depends on the number of electron pairs or electron domains on the valence shell of the central atom of the molecule, both lone pairs and bond pairs. Lone pairs are known to cause more repulsions than bond pairs.

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The formula of an iodate of lanthanum is la(io3)3. what is the formula of the sulfate of lanthanum with the same oxidation numbe
sammy [17]

Iodate has a charge of -1, this means its chemical symbol must be IO3(-1) while Lanthanum is La(+3). Therefore making the compound La(IO3)3.

However sulfate has a chemical symbol of SO4(-2), it has charge of -2, therefore the formula for lanthanum sulfate is:

<span>La2(SO4)<span>3</span></span>

8 0
3 years ago
Read 2 more answers
What is the Na+ concentration in each of the following solutions:
iren [92.7K]

Sodium Sulfate = Na2(SO4) meaning there are two ions of Na+ in one mole of Sodium Sulfate the M stands for Molarity, defined as Molarity = (moles of solute)/(Liters of solution), So if the Na2SO4 solution is 3.65M that means one Liter of has 3.65 moles of Na2SO4, the stoichiometry of Na2SO4 shows that there would be two Na+ ions in solution for every one Na2SO4.

Therefore if 3.65 moles of Na2SO4 was to dissolve, it would produce 7.3 moles of Na+, and since this is still a theoretical solution, we can assume 1 L of solution.

Finally we find [Na+] = 2*3.65 = 7.3M

Use the same logic for parts b and c




5 0
3 years ago
Which of these measurements is expressed as three significant figures?
kipiarov [429]

Which of these measurements is expressed as three significant figures?  


C. 4.20 g


6 0
3 years ago
2) Show the calculation of Kc for the following reaction if an initial reaction mixture of 0.800 mole of CO and 2.40 mole of H2
nadezda [96]

Answer:

Kc = 3.90

Explanation:

CO reacts with H_2 to form CH_4 and H_2O. balanced reaction is:

CO(g) + 3H_2 (g) \leftrightharpoons CH_4(g)  +  H_2O(g)

No. of moles of CO = 0.800 mol

No. of moles of H_2 = 2.40 mol

Volume = 8.00 L

Concentration = \frac{Moles}{Volume\ in\ L}

Concentration of CO = \frac{0.800}{8.00} = 0.100\ mol/L

Concentration of H_2 = \frac{2.40}{8.00} = 0.300\ mol/L

                 CO(g) + 3H_2 (g) \leftrightharpoons CH_4(g)  +  H_2O(g)

Initial            0.100      0.300             0   0

equi.            0.100 -x    0.300 - 3x     x    x

It is given that,

at equilibrium H_2O (x) = 0.309/8.00 = 0.0386 M

So, at equilibrium CO = 0.100 - 0.0386 = 0.0614 M

At equilibrium H_2 = 0.300 - 0.0386 × 3 = 0.184 M

At equilibrium CH_4 = 0.0386 M

Kc=\frac{[H_2O][CH_4]}{[CO][H_2]^3}

Kc=\frac{0.0386 \times 0.0386}{(0.184)^3 \times 0.0614} =3.90

8 0
3 years ago
What is a number at the bottom right of an element in a chemical equation called?
Ann [662]

Answer:

There’s a particular way of writing what’s in a molecule called a chemical formula. The chemical formulae for all the elements that form each molecule and uses a small number to the bottom right of an element’s symbol to stand for the number of atoms of that element. For example, the chemical formula for water is H 2 O.

Explanation:

7 0
3 years ago
Read 2 more answers
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