CHEMISTRY HIGH SCHOOL

Which is not true of binary compounds?

Answers

Answer 1

Answer:

The answer is: The name of the positively charged nonmetal ion is changed to end in –ide.

For example, a chemical compound containing sodium and chlorine is binary ionic compound sodium chloride (NaCl).

In this compound, sodium (Na) has positive charge and chlorine (Cl) has negative charge.

Chlorine is nonmetal and sodium is metal.

Metals have positive charge and nonmetals negative.

Answer 2

Answer: The name of the positively charged nonmetal ion is changed to end in –ide, is not true of binary compounds.

Hope this help!

Further Explanation

Mixture

A mixture is a substance that is made up of two or more substances that are not chemically combined and in fixed proportions.
A mixture may have several varying physical properties.
There are two types of mixture:

Homogeneous mixtures

These are mixtures with a similar uniform appearance and composition throughout. Examples are, steel, air, salt water, etc.
Homogeneous mixtures may either be, a colloid or a solution.

Solutions

Solutions are types of homogeneous mixtures containing two or more substances in a single phase.
Solutions contains, a solute which is the substance that dissolves in the other substance, and a solvent which is the substances that dissolves the solute.
For example, in a salt solution, water is the solvent and salt is the solute.

Colloid

A colloid is a homogeneous solution that has an intermediate size particles between a suspension and a solution. Examples of colloids are fog and milk.

Heterogeneous mixtures

This is a type of mixture that contain different substances or two or more phases of matter.
The components of heterogeneous mixtures are not uniform such that different samples of the mixture are not identical to each other.
Examples of heterogeneous mixtures are; blood, soil, Gravel, etc.

Suspension

It is a type of heterogeneous mixture made of larger particles that are visible and normally settles when the mixture is undisturbed.
Examples include, tomato juice, fine sand, etc.

Keywords: Mixtures, homogeneous mixture, Heterogeneous mixture

Learn more about:

Mixtures: brainly.com/question/1446244
Types of Mixtures: brainly.com/question/1446244
Homogeneous mixtures: brainly.com/question/1446244
Heterogeneous mixtures: brainly.com/question/1446244

Level: High school

Subject: Chemistry

Topic: Mixtures and separation of mixtures

Sub-topic: Types of mixtures

Conductivity in a metal results from the metal atoms having(1) high electronegativity(2) high ionization energy(3) highly mobile protons in the nucleus(4) highly mobile electrons in the valence shell

Answers

The answer is (4). You may recall hearing about the "sea of electrons" model of metals. Metals represent the ultimate case of delocalized (shared) valence electrons, and these delocalized valence electrons are what freely move around, conducting current through the body of the metal.

The correct answer is (4) highly mobile electrons in the valence shell

The explanation:

-A metal consists of a lattice of atoms, each with a shell of electrons. This is also known as a positive ionic lattice.

- The outer electrons are free todissociate from their parent atoms and travel through the lattice, creating a sea of electrons, his valence electrons are what freely move around making the metal a conductor.

-When an electrical potential difference is applied across the metal, the electrons drift from one end of the conductor to the other under the influence of the electric field.

Air is made up of different gases, such as oxygen, nitrogen, and carbon dioxide. Which statement best describes these three components of air? A)They are all classified as pure substances.

B)They cannot react with another substance.

C)They are chemically bonded to one another.

D)They can be classified as elements.

Answers

I think the correct answer from the choices listed above is option A. The three components of air are all classified as pure substances since they are not chemically bonded so they can be separated by certain processes and be present as a pure substance. Hope this answers the question.

The statement that best describes the three component of air is they are all classified as pure substances.

What are pure substances?

Pure substances are those substances which are made up of only one material and has specific and fixed structure. They are also called as elements.

Thus, the correct option is A) They are all classified as pure substances.

Learn more about pure substances

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Which base is the strongest for the given [H+]? 10-9 10-11 10-10 10-12

Answers

Answer:The strongest base with $H^+]$ concentration is $[H^+]=10^(-12) M$ .

Explanation:

$pH=-\log[H^+]$

Higher the pH value less will be the concentration of $[H^+]$ ion concentration and stronger will be the base.

1. $[H^+]=10^(-9) M$

$pH=-\log[10^(-9)]=9$

2. $[H^+]=10^(-11) M$

$pH=-\log[10^(-11)]=11$

3. $[H^+]=10^(-10) M$

$pH=-\log[10^(-10)]=10$

4. $[H^+]=10^(-12) M$

$pH=-\log[10^(-12)]=12$

The strongest base with $H^+$ concentration is $[H^+]=10^(-12) M$ .

The answer is 10-12. The relationship of pH and [H+] is pH = -lg[H+]. And the higher pH, the stronger base is. So the strongest base has the lowest concentration of H+.

Which statement best compares coastal ecosystems to open ocean ecosystems?Coastal ecosystems include abyssopelagic depths, and open ocean ecosystems do not.
Coastal ecosystems have less sunlight, fewer nutrients, and less diversity than open ocean ecosystems.
Coastal ecosystems have a greater range of water pressures than open ocean ecosystems.
Coastal ecosystems have more sunlight, more nutrients, and higher levels of productivity than open ocean ecosystems

Answers

The statement that best compares coastal ecosystems to open ocean ecosystems is Coastal ecosystems have more sunlight, more nutrients, and higher levels of productivity than open ocean ecosystems.

What is ecosystem?

ecosystems can be regarded as the biological community of interacting organisms as well as their physical environment.

However, there is coastal ecosystems and open ocean ecosystems, but there are more sunlight, more nutrients, and higher levels of productivity in Coastal ecosystems than ocean ecosystems.

Learn more about ecosystems at:

brainly.com/question/2189549

Answer:

I believe the last one is correct Coastal ecosystems have more sunlight, more nutrients, and higher levels of productivity than open ocean ecosystems

4 Compared to the energy and charge of the electrons in the first shell of a Be atom, the electrons in the second shell of this atom have(1) less energy and the same charge
(2) less energy and a different charge
(3) more energy and the same charge
(4) more energy and a different charge

Answers

Moving the electron away from the nucleus requires energy, so the electrons in the outer shell will have more energy than ones in the inner shell. Electrons always have a charge of -1, so the charge in the inner and outer shell will be the same. Therefore the answer is 3

The electrons in the second shell of this atom have (3) more energy and the same charge compared to the first shell

Further explanation

Bohr's atomic model has shown the energy levels of electrons in the path of the atomic shell

The greater the value of n (the atomic shell, the main quantum number), the greater the energy level

In normal circumstances, electrons fill the shell at the lowest energy level starting from the shell K, L M and then N

When an atom gets energy from outside, the electrons will absorb energy so it moves to higher energy. This situation is called excited

Electrons will return to the original path or a lower energy level because the excited state is unstable. In this condition, the electron will release energy

The electron energy at the nth path can be formulated:

$\rm En=(-Rh)/(n^2)$