Answer:
Molecular Crystal
Explanation:
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(1) chemical energy → electrical energy
(2) electrical energy → chemical energy
(3) light energy → heat energy
(4) light energy → chemical energy
Answer:
(2) electrical energy -> chemical energy
Explanation:
Castle learning
An oxidation reaction involves the loss of electrons or an increase in the oxidation state of an element. Options B, C, and D represent oxidation reactions, while option A does not.
Let's analyze the given options:
A. AuCl₄⁻ → AuCl₂⁻
In this reaction, the gold atom goes from a +3 oxidation state (AuCl₄⁻) to a +1 oxidation state (AuCl₂⁻). This means the gold atom gains two electrons, indicating a reduction rather than oxidation. Therefore, option A is not an oxidation reaction.
B. Mn⁷⁺ → Mn²⁺
In this reaction, the manganese atom goes from a +7 oxidation state to a +2 oxidation state. This indicates a decrease in the oxidation state, which means the manganese atom gains electrons. Therefore, option B represents an oxidation reaction.
C. Co³⁺ → Co²⁺
In this reaction, the cobalt atom goes from a +3 oxidation state to a +2 oxidation state. Similar to option B, this indicates a decrease in the oxidation state, representing an oxidation reaction.
D. Cl₂ → ClO₃⁻
In this reaction, the chlorine molecule (Cl₂) is converted to a chlorate ion (ClO₃⁻). Here, the chlorine atom undergoes an increase in oxidation state, changing from an oxidation state of 0 in Cl₂ to an oxidation state of +5 in ClO₃⁻. This indicates the loss of electrons by chlorine, making option D an oxidation reaction.
Therefore, options B, C, and D represent oxidation reactions, while option A does not.
Learn more about oxidation reaction from the link given below.
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Answer:
22.4 L methane reacts with 44.8L of oxygen to give 44.8L of CO
2 and 22.4 L of water
Explanation:
From the balanced reaction: One mole(or 1 molecule or 16 g) of CH
4
reacts with 2 moles (or 2 molecules or 64 g) of oxygen to give one mole (or 1 molecule or 44 g) of CO
2
and 2 mole (or 2 molecules or 36 g) of water.
For the gaseous system at STP:
22.4 L methane reacts with 44.8 L of oxygen to give 22.4 L of CO
2
and 44.8 L of water.
and 2 mole (or 2 molecules or 36 g) of water.
For the gaseous system at STP:
22.4 L methane reacts with 44.8 L of oxygen to give 22.4 L of CO
2
and 44.8 L of water.
Answer:
H3AsO4 → As2O5 + H2O
Explanation:
The first equation is balanced:
H3AsO4 → As2O5 + H2O
Here's a breakdown of the balanced equation:
Reactants:
H3AsO4: 3 hydrogen atoms, 1 arsenic atom, and 4 oxygen atoms
Products:
As2O5: 2 arsenic atoms and 5 oxygen atoms
H2O: 2 hydrogen atoms and 1 oxygen atom
As you can see, the number of atoms of each element is the same on both sides of the equation. This means that the equation is balanced.