A 0.20-Molar solution of K2CO3 is a better conductor of electricity than a 0.20-Molar solution of KBr. Which of the following BEST explains this observation between the two solutions. *

Answers

Answer 1

Answer:

Answer:

K2CO3 dissociates more ions than Kr

Explanation:

A solution conducts electricity because of much supply of ions an example is strong electrolytes. A solution contains both positive and negative ions and the ability of these ions to move freely allows them to carry positive and negative charges thereby conducting electricity. A solution such as K₂CO₃ dissociates more ions than KBr, therefore it is a better conductor of electricity. Neutral solutions do not conduct electricity.

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An element crystallizes in a face centered cubic lattice and has a density of 1.45 g cm-3 . The edge of its unit cell is 4.52 x 10-8cm.a) How many atoms are in each unit cell?b) What is the volume of a unit cell?c) What is the mass of a unit cell?d) Calculate the approximate atomic mass of the element.

Compare the shape and volume of solids, liquids and gases.

Answers

Solids have both fixed volumes and fixed shapes.
Liquids have fixed volumes, but their shapes depend upon the containers in which they are held.
Gases have neither fixed volumes nor fixed shapes, and expand to fill their containers.

Which statement describes an intensive property of matter?A. It is the same for every sample of a single substance.
B. It depends on how a substance was formed.
C. It is the same for every sample of every substance.
D. It depends on the amount of substance present.

Answers

Among the choices above, I think the statement that best describes an intensive property of matter is letter B which is " It depends on how a substance was formed." Intensive properties are those property which does not depend upon the amount of substance present in the system. Such as refractive-index, density etc

An intensive property of matter is independent of the amount of substance present and is inherent to the material itself. Thus, the correct statement is 'It is the same for every sample of a single substance.' Examples of intensive properties include temperature, density, and color.

An intensive property of matter is a characteristic that does not change based on the amount of a substance. It is independent of the quantity of the substance present and is inherent to the material itself. Therefore, the statement which best describes an intensive property of matter would be 'It is the same for every sample of a single substance.'

Examples of intensive properties include temperature, density, and color. For instance, if you divide a gold bar in half, each half will have the same density and color as the original bar, because these properties are independent of the amount of substance present.

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What can be concluded if an ion of an element is smaller than an atom of the same element?(1) The ion is negatively charged because it has fewer electrons than the atom.
(2) The ion is negatively charged because it has more electrons than the atom.
(3) The ion is positively charged because it has fewer electrons than the atom.
(4) The ion is positively charged because it has more electrons than the atom.

Answers

The question is,'what can be concluded if the ion of an element is smaller than the atom of the same element'. The correct option is 'the ion is positively charged because it has fewer electrons than the atom. An atom becomes charged either by donation or accepting electrons. When an atom donate electrons, it becomes positively charged and it has less electrons than its atom. For instance, calcium has 20 electrons, it becomes an ion by donating its two electrovalent electrons, thereby having only 18 electrons left. But when an element accepts electrons, it becomes negatively charged and has more electrons than its atom.

The following conclusion can be made if an ion of an element is smaller than an atom of the same element:

$\boxed{\left( 3 \right){\text{ The ion is positively charged because it has fewer electrons than the atom}}{\text{.}}}$

Further explanation:

Ions are the entities with a net electric charge, be it positive or negative. Since positive and negative charges can be present on the ions, ions are of two types-positively charged and negatively charged ions. The ions formed by loss of electrons develop a positive charge and are called cations. But the ions produced by the gain of electrons acquire a negative charge and are called anions.

Since cations are positively charged ions, these have fewer electrons as compared to the corresponding neutral atom. So these ions experience stronger forces of attraction with the atomic nucleus and are smaller in size in size than the parent atom.

Anions are formed by the addition of electrons to the neutral atom. It has more electrons than the parent atom so it feels electron-electron repulsion due to which its size becomes larger than the parent atom.

So cations are smaller than the parent atom of the same element whereas anions are larger than the parent atoms. Therefore if an ion is smaller than the atom, it is positively charged due to the presence of fewer electrons than the parent atom.

Learn more:

Component of John Dalton’s atomic theory: brainly.com/question/2357175
Basis of investigation for the scientists: brainly.com/question/158048

Answer details:

Grade: Senior School

Chapter: Atomic structure

Subject: Chemistry

Keywords: ions, cations, anions, loss, gain, electrons, net electric charge, electron-electron repulsion, parent atom, smaller, larger, size, neutral atom, positive charge, negative charge.

What is first and second element of the periodic table?

Answers

The elements on the periodic table are listed in increasing atomic number.

Hydrogen is the first element, and has an A.N. of 1. Also, its very interesting how it doesn't need 8 valence electrons to be stable.

The second element is Helium, which has an A.N (atomic number) of two.

The first element of the periodic table is hydrogen (H), and the second element is helium (He).

Hydrogen, with atomic number 1, is the first element in the periodic table. It is the lightest and the most abundant element in universe. Hydrogen is a colorless, odorless gas and is the building block for all other elements.

Helium, with atomic number 2, is the second element in the periodic table. It is also a gas, but unlike hydrogen, it is inert and does not readily react with other elements. Helium is known for its low density, which makes it lighter than air, and it is commonly used for filling balloons and as a cooling medium in various scientific and industrial applications.

So, the first element of the periodic table is hydrogen (H), and the second element is helium (He).

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Which is the name of C5H12?n-heptane
n-butane
All of these
n-pentane
n-hexane

Answers

pentane is the correct answer the prefix pent means 5 so 5 hydrogens

what happens during vaporization and evaporation?

Answers

with vaporization, think of hot water, at a point it starts to boil and steam is created. that's water vapor then it dissipates. With evaporation, think of rain, whewn it rains, the grouns doesn't soak it all up, It goes through the cycle. clouds, rain, evaporation, clouds again. does that make scene?

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