CHEMISTRY HIGH SCHOOL

What is the concentration of a solution that has a volume of 2.5L and contains exactly 2.125 moles of calcium phosphate

Answers

Answer 1

Answer:

Answer:

0.85 mol/L.

Explanation:

Molarity is defined as the no. of moles of solute dissolved in a liter of the solution.

M = (no. of moles of solute)/(Volume of the solution (L))

no. of moles of calcium phosphate = 2.125 mol.

Volume of the solution = 2.5 L.

∴ M of calcium phosphate = (2.125 mol)/(2.5 L) = 0.85 mol/L.

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Diatomic gases such as H2(g), O2(g), and N2(g) contain ________ bonds.

Answers

Diatomic gases contain covalent bonds. Take for example hydrogen atoms. They have one electron, which leads to the electron configuration 1s. This atom will gain stability by sharing its electron valence with other equal atom which is also willing to gain stability by sharing its valence electron. Then two atoms of hydrogen share their valence electrons to form a diatomic molecule through a covalent bond.

What are two examples of an endothermic reaction and what are two examples of an ectothermic reaction?

Answers

Exothermic processes: Making ice cubes,formation of snow in clouds

Endothermic processe: Melting ice cubes, evaporation of water

Which occurs when two fluorine atoms react to produce a fluorine molecule?(1) Energy is absorbed as a bond is broken.
(2) Energy is absorbed as a bond is formed.
(3) Energy is released as a bond is broken.
(4) Energy is released as a bond is formed.

Answers

The answer is 4. When atoms mix to create a compound, energy is continuously set off, and the compound has a lesser total energy. When a chemical reaction happens, molecular bonds are shattered and other bonds are made to create unalike molecules. For instance, the bonds of two water molecules are shattered to make hydrogen and oxygen.

The change that occurs when two fluorine atoms react to produce fluorine molecule is $\boxed{\left( 4 \right){\text{ Energy is released as a bond is formed}}}$ .

Further Explanation:

The attraction between different atoms, molecules and ions is known as a chemical bond. Such bonds are responsible for the formation of chemical compounds.

An ionic bond is formed as a result of the interaction between a metal and a non-metal. Metals have the tendency to lose electrons while non-metals tend to gain electrons. Due to this, metal atoms form cations by loss of electrons and non-metals become anions with the gain of electrons.

A covalent bond is formed by the mutual sharing of electrons between the bonded atoms. It is also called molecular bond. Such bonds usually exist between two or more non-metals.

The atomic number of fluorine is 9 and it has a configuration of $1{s^2}2{s^2}2{p^5}$ . It is just one electron short of the stable configuration of neon. When two fluorine atoms approach each other, both share one of their valence electrons and form a single covalent bond. Since ${{\text{F}}_{\text{2}}}$ formed has a complete octet, its stability is quite high. The two fluorine atoms tend to bond with each other to form fluorine molecule so energy is released during the process. Therefore option (4) is correct.

Learn more:

Identification of ionic bonding: brainly.com/question/1603987
What type of bond exists between phosphorus and chlorine? brainly.com/question/81715

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Ionic and covalent compounds

Keywords: chemical bond, ionic bond, covalent bond, fluorine, 9, neon, stability, octet, configuration, electron, fluorine atoms, fluorine molecule. Energy.

If a person looking at a poster sees green instead of yellow and doesn't see red at all, this person most likely has color blindness where _______ nerves fail to respond to light properly.

Answers

Answer:

The correct answer is red-sensitive nerves.

Explanation:

The individuals with protanopia do not possess the tendency to sense red light, the individuals with tritanopia do not sense blue light, and the individuals with deuteranopia do not sense green light. If an individual is perceiving green color then in that case, the yellow sensitive nerves must function somewhat efficiently as green is an amalgamation of blue and yellow. Thus, the red-sensitive nerves would not be reacting appropriately for this individual.

Umm that's 'cones' a being has rods and cones to distinguish between colors and dark / black light . one would use cones for colored light or colors and rods when its dark .

Saltwater _____. has a pH of 10 is mostly used for irrigation and farming can be desalinized and used for drinking is mostly found in glaciers, ice caps, and aquifers

Answers

I think the best statement to fill the blank is that "can be desalinized and used for drinking". The said statement seems the most appropriate one because the pH of saltwater is not 10 but approximately between 7.6 to 8.4. Also, saltwater is not found in glaciers, ice caps and aquifers instead it is freshwater.

Answer:

Explanation:

can be desalinized and used for drinking

The regions within an electron cloud where electrons are located are called orbitals

electron levels

orbits

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Answers

The answer would be Orbital.

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