Consider the following 1.0 mol L–1solutions. Which one of the following lists the
solutions in decreasing order (that is, strongest to weakest) of electrolyte strength?

(a) sodium phosphate > sulfuric acid > phosphoric acid > sucrose (sugar)
(b) sucrose (sugar) > sulfuric acid > phosphoric acid > sodium phosphate
(c) sulfuric acid > sodium phosphate > phosphoric acid > sucrose (sugar)
(d) sodium phosphate > phosphoric acid > sulfuric acid > sucrose (sugar)

Answers

Answer 1

Answer: (a) sodium phosphate > sulfuric acid > phosphoric acid > sucrose (sugar)
(b) sucrose (sugar) > sulfuric acid > phosphoric acid > sodium phosphate
(c) sulfuric acid > sodium phosphate > phosphoric acid > sucrose (sugar)
(d) sodium phosphate > phosphoric acid > sulfuric acid > sucrose (sugar)

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Air contains maximum amount of?

Answers

Nitrogen by 78 percentage.

How do the energy and the most probable location of an electron in the third shell of an atom compare to the energy and the most probable location of an electron in the first shell of the same atom?(1) In the third shell, an electron has more energy and is closer to the nucleus.
(2) In the third shell, an electron has more energy and is farther from the nucleus.
(3) In the third shell, an electron has less energy and is closer to the nucleus.
(4) In the third shell, an electron has less energy and is farther from the nucleus.

Answers

The answer is (2). You can think about this question in terms of the Bohr's model of the atom or in terms of quantum chemistry. In the Bohr model, electrons exist in discrete "shells," each respresenting a fixed spherical distance from the nucleus in which electrons of certain energy levels orbit the nucleus. The larger the shell (the greater the "orbit" radius), the greater the energy of the "orbiting" electron (I use quotations because electrons don't actually orbit the nucleus in the traditional sense, as you may know). Thus, according to the Bohr model, a third shell electron should be farther from the nucleus and have greater energy than an electron in the first shell.The quantum model is differs drastically from the Bohr model in many ways, but the essence is the same. A larger principal quantum number indicates 1) greater overall energy and 2) a probability distribution spread a bit more outward.

Another source of energy is nuclear energy. Nuclear energy is the energy in the nucleus of an atom. We can release this energy and use it to make electricity. In this project, you will research nuclear energy.OBJECTIVES
Research nuclear energy and its use for generating electricity.

Directions
Use the library, internet, and other educational resources to research nuclear energy.
Write a three-paragraph report on what you have learned. Be sure to include the uses of nuclear power, how it is generated, and the impact it has on the environment. Also, answer the question, "Is nuclear energy renewable?"

Answers

Yes.Nuclear energy is renewable

If the sun ran out of energy what would happen to the energy resources on earth

Answers

It would be too cold for most man-made energy resources to work correctly.

Which list of radioisotopes contains an alpha emitter, a beta emitter, and a positron emitter?(1) C-14, N-16, P-32
(2) Cs-137, Fr-220, Tc-99
(3) Kr-85, Ne-19, Rn-222
(4) Pu-239, Th-232, U-238

Answers

Answer: The correct option is 3.

Explanation: Radioisotopes which emits alpha-particle are known as alpha-emitters. These radioisotopesundergo alpha-decay.

The radioisotopes which emits beta-particle $(_(-1)^0\beta )$ are known as beta-emitters. These radioisotopes undergo beta-minus decay. In this decay a neutron gets converted to a proton and an electron.

The radioisotopes which emits positron-particle $(_(+1)^0\beta )$ are known as positron-emitters. These radioisotopes undergo beta-plus decay. In this type of decay a proton gets converted to a neutron.

From the given options,

Option 1: All the three radioisotopes undergoes beta-minus decay.

Option 2: Cs-137 and Tc-99 radioisotopes undergo beta-minus decay.

Fr-220 is a radioisotope which undergoes alpha-decay.

Option 3: Radioisotope Kr-85 undergoes beta-minus decay.

$_(36)^(85)\textrm{Kr}\rightarrow _(37)^(85)\textrm{Rb}+_(-1)^0\beta$

Radioisotope Ne-19 undergoes positron decay.

$_(10)^(19)\textrm{Ne}\rightarrow _(9)^(19)\textrm{F}+_(+1)^0\beta$

Radioisotope Rn-222 undergoes alpha decay.

$_(86)^(222)\textrm{Rn}\rightarrow _(84)^(218)\textrm{Po}+_(2)^4\alpha$

Option 4: All the three radioisotopes undergoes beta-minus decay processes.

Hence, from the above information, the correct option is 3.

The answer is (3), they are β-, β+ and α decay mode. For (1), they are β-, β- and β- decay mode. For (2), they are β-, α and β-. For (4), they are α, α and α decay mode.

What is the voltage of a galvanic cell made with silver (ag) and nickel (ni)?

Answers

Silver reduction potential: 0.8 V
Nickel reduction potential: -0.23 V

Cell voltage = 0.8 - (-0.23)
= 1.03 V

Answer:

1.05 V

Explanation:

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