Which statement correctly describes the classification of chemical reactions into different categories

Question

Responses:

All reactions fit into a category, and a reaction can fit into only one category.

Not all reactions fit into a category, and some reactions can fit into more than one category.

Not all reactions fit into a category, and a reaction can fit into only one category.

All reactions fit into a category, and some reactions can fit into more than one category.

Answer 1

The correct statement is:

Not all reactions fit into a category, and some reactions can fit into more than one category.

This is because while many chemical reactions can be classified into specific categories (such as synthesis, decomposition, single replacement, double replacement, etc.), there are reactions that may not fit neatly into one category. Additionally, some reactions may exhibit characteristics of multiple categories.

Answer 2

In the decomposition of water, why is twice as much hydrogen as oxygen formed
Responses:

Hydrogen atoms are twice the size of oxygen atoms.

There are two atoms of hydrogen and one atom of oxygen in a water molecule.

Some oxygen gas escapes the reaction, and hydrogen gas is conserved.

Hydrogen gas has two atoms, and oxygen gas has one atom.

Answer 3

The correct response is:

There are two atoms of hydrogen and one atom of oxygen in a water molecule.

This explains why, during the decomposition of water (H₂O) into hydrogen (H₂) and oxygen (O₂) gases, you obtain twice as much hydrogen gas as oxygen gas. Each molecule of water consists of two hydrogen atoms bonded to one oxygen atom, resulting in the formation of two moles of hydrogen for every mole of oxygen produced when water decomposes.

Answer 4

Which component is transferred between substances in an oxygen-reduction reaction
Responses:

oxygen

energy

electrons

protons

Answer 5

In an oxygen-reduction reaction (often referred to as a redox reaction), the component that is transferred between substances is:

electrons.

In these reactions, oxidation involves the loss of electrons, while reduction involves the gain of electrons. The transfer of electrons is what characterizes redox reactions.

Answer 6

In a chemical reaction, substance A transfers electrons to substance B. Which statement is correct
Responses:

Substance B is oxidized and acts as the reducing agent.

Substance A is oxidized and acts as the oxidizing agent.

Substance A is reduced and acts as the reducing agent.

Substance B is reduced and acts as the oxidizing agent.

Answer 7

The correct statement is:

Substance B is reduced and acts as the oxidizing agent.

In a redox reaction, when substance A transfers electrons to substance B, substance A undergoes oxidation (loses electrons) and substance B undergoes reduction (gains electrons). Since substance B gains electrons, it is reduced and acts as the oxidizing agent, which means it facilitates the oxidation of substance A.