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#1
#1
If two atoms have a difference in electronegativity < 1.7, will they share or transfer electrons?
They will share their electrons
Balance the following equation: \(CH_{4}+O_{2}→CO_{2}+H_{2}O\)
\(CH_{4}+2O_{2}\ →CO_{2}+2H_{2}O\)
What is the name of a bond between a metal and a nonmetal?
An ionic bond
What is the difference between synthesis and decomposition?
Synthesis (A+B → AB) combines multiple reactants into one complex product, while decomposition (AB → A+B) breaks one complex reactant into simpler parts.
What is a covalent bond?
A bond between two atoms who share their electrons with each other.
What is the difference between a subscript and coefficient in a chemical equation?
True or False. If the difference of electronegativity of two atoms is greater than 0.5, it is a nonpolar covalent bond.
False, it is a polar covalent bond.
What is the difference between single-displacement and double-displacement chemical reactions?
In a single-displacement reaction (A+BC [rightarrow] AC+B), one element replaces another in a compound. In a double-displacement reaction (AB + CD [rightarrow] AD+CB), the ions of two different compounds switch places to form two entirely new compounds.
What is bond length?
It is the distance between two nuclei at the point of minimum energy.
What are chemical symbols for the physical state of liquids and aqueous solutions? Describe their physical states.
A liquid (l) has a definite volume but no fixed shape, meaning it takes the shape of its container. T An aqueous state (aq) describes a mixture where a solute (like salt or sugar) is dispersed throughout a solvent (water).
What is electronegativity?
The ability of an atom to attract shared electrons.
What is a solvent and solute?
A solute is the substance that gets dissolved, while a solvent is the substance that does the dissolving.
True or False. Electrons are more attracted to an atom with a higher electronegativity.
True
Frost formed on the outside of the beaker holding the reacting substances. What type of chemical reaction is this?
Endothermic reaction.
What is polarity?
It is the separation of charges.
Why is it important to show chemical reactions in a balanced form?
A balanced chemical equation ensures that the Law of Conservation of Mass is upheld.
Which elements do covalent bonds tend to form from?
A.Non-metals and metalloids
B.Metals and metalloids
C.Non-metals and metals
D.Just metals
A. Non-metals and metalloids
What is an endergonic reaction?
An endergonic reaction is a process that absorbs energy, meaning it requires an ongoing input of energy to occur and it is non-spontaneous.
Would atoms from two nonmetal or metalloids with a nearly equal number of electrons form a polar covalent bond?
No, it would be a nonpolar covalent bond, because the number of electrons is very similar.
What is the difference between an endergonic reaction and an endothermic reaction?
Endothermic reactions specifically absorb heat. Endergonic reactions absorb free energy when energy is fed to them.
Are electrons shared evenly during polar covalent bonds?
No, they are shared unevenly.
What is the meaning of the term ‘precipitate’ in chemical reactions?
An insoluble solid that forms when two ionic compounds in solution are combined.
What is an inhibitor? What is it opposite to?
An inhibitor in chemistry is a substance that slows down, delays, or completely stops a chemical reaction; Catalyst.
The following is a chemical equation:{AgNO}_{3}(aq)+{NaCl}(aq)→{AgCl}(s)+\text{NaNO}_{3}(aq)\)
What type of reaction is this? Why?
This is a double-displacement reaction. The two reacting ionic compounds "swap" partners. The silver from the first compound pairs with the chloride from the second, while the sodium pairs with the nitrate.
What is an exergonic reaction?
An exergonic reaction is a chemical process that releases energy, making it spontaneous.