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strojnjashka [21]
3 years ago
5

Which idea behind the shape of molecules includes the concept that electrostatic repulsion between electron pairs surrounding an

atom causes these pairs to be separated as far as possible
Chemistry
1 answer:
Vladimir79 [104]3 years ago
8 0

Answer:

VSEPR theory

Explanation:

The valence shell electron pair repulsion theory was propounded by Gillespie and Nylom (1957).

The entire idea of the VSEPR theory is that the shape of a molecule depends on the electrostatic repulsion between electron pairs surrounding the central atom in a molecule which causes these pairs to be separated as far as possible.

The shapes of many molecules can be accurately predicted based on this model.

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Which value would be required to estimate the lattice energy for the hypothetical ionic compound MgH2?
Sonja [21]
D, the energy of formation is equal to the dissociation. so from magnesium ions and Hydrogen ions, when they form the lattice energy is equal to formation-dissociation, as they aren't going to dissociate (fixed in lattice) the formation should be the same as the the overall lattice energy. 
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At 95°C, the pressure of a sample of chlorine is 1.15atm. What will the pressure be at 105°C, assuming constant volume?
Jobisdone [24]

Answer:

95+273=368k

105+273=378k

(1 .15/368)×378

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A 6.0 M HCI solution is diluted to make 500 mL of a 2.5 M HCI solution. What volume of the 6.0 M HCI solution is required to mak
rodikova [14]

Answer:

V₁   = 208.3 mL

Explanation:

Given data:

Initial molarity of HCl  = 6.0 M

Final volume = 500 mL

Final molarity = 2.5 M

Volume of initial solution required = ?

Solution:

Formula:

M₁V₁   =  M₂V₂

Now we will put the values in formula.

6.0 M × V₁   = 2.5 M ×500 mL

6.0 M × V₁   = 1250 M.mL

V₁   = 1250 M.mL / 6.0 M

V₁   = 208.3 mL

4 0
3 years ago
Which of the following is NOT a way that biodiversity is important to an ecosystem?
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Answer:

A. Biodiversity can increase the rate of extinction

Explanation:

That statement is false because variety is better for a better ecosystem. With variety more can survive in certain situations that others cant.

5 0
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True or false heat always flows from a substance at a lower temperature to a substance at a higher temperature
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The statement is false is it the opposite
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