Answer:
The answer to your question is b. Mg is being oxidized and c. Mg is the
reducing agent.
Explanation:
Reduction is the gain of electrons
Oxidation is the loss of electrons
Reducing agent is the element that oxidizes itself and reduces another element.
Oxidizing agent is the element the reduces itself and oxidizes another element.
In this reaction:
Magnesium loses electrons so it is being oxidized and it is the reducing agent.
I believe the answer is d
In the given equations for chemical reaction, The Equation No. 2 represents an endothermic chemical reaction.
<h3>What is an Endothermic Chemical Reaction ?</h3>
A reaction which uses energy for the formation of products is known as endothermic reaction.
In the Given Equations,
Equation no. 2 shows the uses of energy with reactants at right hand side which accounts the involvement of energy for the formation of product.
Hence, Equation 2 is a Endothermic chemical reaction.
Learn more about endothermic reaction here ;
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Answer:
Hg
Explanation:
We are given information about the unknown element, and using each characteristic, we can narrow down the possible elements until we have just one possibility left.
Conducts electricity: This means that the element has to be a metal, or a semi-metal, because non-metals cannot conduct electricity.
Forming chloride and oxide ions: When it is seen that it forms chloride and oxide ions in the form of XCl₂ and XO, it can be seen that this element has an ionic charge of +2. This narrows it down to the elements in <u>Group 2.</u>
Liquid at room temperature: This is tricky, because we realize that there are no elements in group 2 that are liquid at room temperature. So hence we can look at groups 3 to 12, and see if there are any liquid metals with an ionic charge of +2.
Taking all this information into account, we can see that the only element it can be is mercury (Hg).
Answer:
a) Molecular crystal
b) Molecular crystal
c) Molecular crystal
d) Ionic crystal
e) Metallic crystal
f) Covalent crystal
g) Ionic crystal
h) Metallic crystal
Explanation:
The bonds between the elements can be classified as ionic, covalent or metallic. The ionic bonds happen between a metal and a nonmetal, where the metal donates electrons and the nonmetal gain the electrons, forming ions. When this occurs, the solid formed is called ionic crystals, such as KBr and LiCl.
When the bond is between nonmetals, its called a covalent bond, and the nonmetals share pair of electrons. When a solid is formed, it can be called as covalent crystals or molecular crystals. The molecular crystals are formed by a determined number of electrons such as CO₂, Br₂ and S₈. On the other hand, the covalent crystals are polymolecular, such as the silica, SiO₂.
When metals do bonds between them, the bond is called a metallic bond, which can happen between atoms of the same element or different elements. The solid formed is called metallic crystal, such as Mg, and Cr.
