CHEMISTRY HIGH SCHOOL

What is the volume of 2.10 moles of chlorine gas (Cl2) at 273 K and 1.00 atm?10.7 L
22.4 L
47.1 L
82.0 L

Answers

Answer 1
Answer: I think the answer is 47.1 . I'm not sure. Iv'e done it before but I haven't got my grade for the answer yet. Hope this right and hope it helps!

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Which of the following is NOT a common property of bases?a. feels slippery
b. tastes bitter
c. reacts with metals
d. changes colors of indicators

Answers

Bases are a class of compounds composed mainly of metal oxides and metal hydroxides. Bases exhibit the following properties:
Slippery feeling because they react with oils on the skin's surface to form soap.
Bitter taste
Changes color of indicators

However, bases do not react with metals. Therefore, the answer is C.

For a cell whose potential is -0.46 v with 3 moles of electrons exchanged, what is DG?DG = -nFE°cell

a.) -133 kJ
b.) +133 kJ
c.) +133,170 kJ
d.) -6.65 x 10^-3

Answers

ΔG = -nEF

ΔG = Gibbs free energy change
n = moles of electrones participated in
E = Electrode potential
F = Faraday constant

By substituting,
ΔG = -(3 mol) x 96485 A S/ mol x (-0.46) V
      = + 133149.3 J
      = + 133 kJ

Hence the answer is "b".

Since ΔG is a positive value, the reaction is non spontaneous reaction.

In ____________, electrons are gained by atoms and lost by others

Answers

the answer is ionic bonds
in ions atoms lose and gain electrons

The basic points in Lewis and Langmuir theory of electrovalency

Answers

The correct answer for the question that is being presented above is this one: "Electrovalency is characterized with the transferring of one or more electrons from one atom to another together with the formation of ions and as well as the number of positive and negative charges. 

The Lewis and Langmuir theory of electrovalency (and as well as Kossel's) is dealing with Ionic bonds. 

Lewis: electron-pair sharing, octet rule, Lewis Symbols or StructureLangmuir: introduced term "covalent" bond, and popularized Lewis's ideas

The Lewis-Langmuir electron-pair or covalent bond is referred as the homopolar bond, where the complete transfer of electrons give rise to ionic, or electrovalent bond (1) through attraction of opposite charges.

One problem with using pesticides to control insects on crops is that the insects can develop resistance to the chemicals. How is this similar to the overuse of antibiotics?

Answers

Answer:

Explanation:

Overuse of antibiotics leads to bacteria's resistance against our drugs. This is increasing at an alarming rate and the reason is that overuse of antibiotics kills bacteria that lack the "resistance" gene or gene that can help them survive the antibiotics (similar is the case for insects that die to insecticides). But, some bacteria can have random mutations in their gene that can help them survive the antibiotic (similar is the case for some insects that can survive the insecticide), thus the surviving bacteria give rise to next generation of bacteria that are resistant to the given antibiotic (similar to how insects that survive the insecticide give birth to new insects that are resistant to insecticide too). Soon, every generation adds new antibiotic resistant bacteria (or new insecticide resistant insects in the case of insects) which is dangerous for all of life on this planet. Therefore, both are similar in the sense that new generations of these organisms will be resistant to our weapons against them.

Why is crushed ice used for snow cones? a) decreasing the pressure helps dissolve more flavoring
b) increasing the temperature helps dissolve more flavoring
c) increasing the surface area helps dissolve more flavoring
d) decreasing agitation helps dissolve more flavoring

Answers

The reason for crushing ice for snow cones is C) increasing the surface area helps dissolve more flavoring. The amount of flavoring absorbed depends on the temperature and the surface area of contact. Because the temperature can not be increased without melting the ice, the ice is crushed. This increases its surface area and more flavoring is dissolved.
The answer to the question is C, increasing the surface area helps dissolve more flavoring. The motivation behind why squashed ice utilized for snow cones is a direct result of expanding the surface range breaks down all the more enhancing. The snow cone is a cone-molded paper glass that contains little bits of ice enhanced with a sweet syrup.
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