Answer:
D. poor conductors of electricity.
Explanation:
Answer:
The oxidation number of iron changes from 2+ to 0.
10 electrons are transferred in the reaction.
Explanation:
Step 1: Write the balanced redox reaction
5 Fe²⁺ + 2 Mn²⁺ + 8 H₂O ⇒ 2 MnO₄⁻ + 5 Fe + 16 H⁺
Step 2: identify both half-reactions
Reduction: 5 Fe²⁺ + 10 e⁻ ⇒ 5 Fe
Oxidation: 2 Mn²⁺ + 8 H₂O ⇒ 2 MnO₄⁻ + 16 H⁺ + 10 e⁻
Step 3: Identify the oxidation state change of iron
Iron changes from Fe²⁺ to Fe, that is, the oxidation number changes from 2+ to 0.
Step 4: Determine how many electrons are transferred in the reaction?
According to both balanced half-reactions, 10 electrons are transferred in the reaction.
Answer:
According to conservation of matter, there should be equal amounts of all elements on both the reactant and product side.
Reactant:
1 Ca
1 C
1 O
Product:
1 Ca
1 C
3 O
Therefore, your friend is right because the law of conservation of matter is not followed in this chemical equation.
Explanation:
(2)
Answer:
Water is a unique molecule and thus consists of unique properties. It is considered polar because of its charges and its bent shape. The two oxygen are negative and the hydrogen is positive. This creates two poles, making the molecule polar. This is an example of polar covalent chemical bonding.
Sodium chloride, methane gas and water
