Define the term ''pH' stand for?

Answers

Answer 1

Answer: PH tells us how acidic or alkali a solution is.

Answer 2

Answer: The Term pH stands for: Power of Hydrogen!

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the frog population in the Amazon basin varied. every 500 years there was a mutational change leading to speciation. in between the population remained the same with no observable changes. What pattern of macroevlution determined this change?

Answers

The frog population in the Amazon basin varied. Every 500 years there was a mutational change leading to speciation. In between the population remainedthe same with no observable changes. The pattern of macroevolution is that there is a change in species orientation and adaptation to change

Which substance is a binary acid

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It is knownthat acids compounds contains hydrogen and produces hydrogen ion in water. A binaryacid however is an acid that have two elements, one of the element has ahydrogen attached to it. Examples of binary acids are hydrogen fluoride (HF),hydrogen bromide (HBr) and hydrogen sulfide (H2S). In naming a binary acid, ithas two rules; one, as pure compounds and two, as acid solutions. For purecompounds, start with the name ‘hydrogen’ and end the anion name with ‘-ide’. Foracidic compounds, start with ‘hydro-‘, end the anion with ‘-ic’ and add ‘acid’.

Which process is exothermic?(1) boiling of water
(2) melting of copper
(3) condensation of ethanol vapor
(4) sublimation of iodine

Answers

Answer:

The correct answer is option 3.

Explanation:

Condensationof ethanol vapors is an exothermic process. This is because particles in gaseous has highest energy . Some of this energy gets released when these particles or ethanol vapors condenses into a liquid state where they have less amount of energy in comparison to gaseous state.

$C_2H_5OH(g)\rightarrow C_2H_5OH(l) + Heat$

As we know that exothermic reaction are those reaction in which heat is released into the surroundings.

Where as the other options are example of an endothermic reaction.where heat is absorbed from the surroundings.

Hence, the correct answer is option 3.

8. why the partial negative charge occurs in a molecule of water?

Answers

Answer:

Explanation:

The partial negative charge in a water molecule occurs because of differences in electronegativity between the atoms involved. A water molecule (H2O) consists of two hydrogen atoms and one oxygen atom. Oxygen is significantly more electronegative than hydrogen, which means it has a stronger attraction for electrons.

In a covalent bond between hydrogen and oxygen, such as in a water molecule, electrons are shared between the two atoms. However, because oxygen is more electronegative, it pulls the shared electrons closer to itself, creating an uneven distribution of electron density. This results in the oxygen atom having a partial negative charge (δ-) and the hydrogen atoms having partial positive charges (δ+).

The electronegativity difference between hydrogen and oxygen causes the electrons in the covalent bonds to spend more time around the oxygen atom, making it partially negatively charged. This partial negative charge on the oxygen atom and the partial positive charges on the hydrogen atoms give water its polar nature. This polarity plays a crucial role in various chemical and physical properties of water, such as its ability to form hydrogen bonds, its high surface tension, and its unique solvent properties.

Elements have been discovered with up to how many energy levels

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20 because each row has 20 columns

Which balanced equation represents a fusion reaction?

Answers

Fusion reaction is a type of nuclear reaction where two or more nuclei combine or collide to form an element with a higher atomic number. This happens when the collision is in a very high speed. In this process, some of the matter of the fusing nuclei is converted to photons.

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