CHEMISTRY HIGH SCHOOL

Which of the following elements has the largest electronegativity?Fluorine (F)
Bromine (Br)
Lithium (LI)
Calcium (Ca)

Answers

Answer 1

Answer:

Answer:

FLUORINE

Explanation:

It has 5 electrons In Its 2P shell!

Answer 2

Answer:

Answer:

Fluorine

Explanation:

because it has a score of 4.0 which is the highest possible

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In the combustion of hydrocarbon, carbon monoxide is formed. What has occured?

Answers

An incomplete combustion happened in the combustion of a hydrocarbon where carbon monoxide is produced. It happens when there is not enough oxygen to combust the hydrocarbon. The opposite is the complete combustion where CO2 and H2O is formed.

Answer: This is an incomplete combustion reaction.

Explanation:

Combustion reaction is defined as the reaction in which a hydrocarbon produces carbon dioxide gas and water molecule when reacted with oxygen gas. General equation for this reaction is:

$\text{Hydrocarbon}+O_2(g)\rightarrow CO_2(g)+H_2O(l)$

Incomplete combustion is also a reaction between oxygen and hydrocarbon in which the products obtained are carbon monoxide, water and carbon. This type of combustion happens when there is insufficient supply of oxygen gas. General equation for this reaction is:

$\text{Hydrocarbon}+O_2(g)\rightarrow CO(g)+H_2O(l)+C(s)$

Hence, the hydrocarbon is undergoing an incomplete combustion reaction.

Which compound has both ionic and covalent bonds?
(1) CO2 (3) NaI
(2) CH3OH (4) Na2CO3

Answers

The compound that has both ionic and covalent bonds is $\boxed{{\mathbf{4}}{\mathbf{.}}{\text{ }}{\mathbf{N}}{{\mathbf{a}}_{\mathbf{2}}}{\mathbf{C}}{{\mathbf{O}}_{\mathbf{3}}}}$ .

Further explanation:

The periodic properties are characteristics that are associated with the different elements found in the periodic table. The origin of different properties is the difference in the atomic structure of the different elements.

For a systematic study of the chemical and physical properties of different elements, they are placed in certain columns called groups and horizontal rows called periods. The rows of the table called periods and have metals on the left and non-metals on the right. The columns also called groups contains elements with similar chemical properties.

The ionic bond is a chemical bond between two atoms in which one atom donates its electron to another atom. While covalent bonds involve sharing of electrons between two atoms and reach a more stable electron configuration.

Compounds made from two elements can either have an ionic or covalent bond.

(i) If a compound is made between metal and a non-metal then the bond will be ionic.

(ii)If a compound is made between two non-metals then the bond will be covalent.

(1) In ${\mathbf{C}}{{\mathbf{O}}_{\mathbf{2}}}$ , oxygen(O) and carbon(C) are nonmetals. They form a covalent compound, and bond present in ${\mathbf{C}}{{\mathbf{O}}_{\mathbf{2}}}$ will be covalent bond.

(2) In NaI, sodium (Na) is metal and iodine (I) is a nonmetal. They will form an ionic compound, and bond present NaI will be ionic.

(3) In ${\mathbf{C}}{{\mathbf{H}}_{\mathbf{3}}}{\mathbf{OH}}$ , carbon(C) hydrogen(H) and oxygen(O) all are nonmetal atoms they will form a covalent compound, and bond present in will be covalent.

(4) In ${\mathbf{N}}{{\mathbf{a}}_{\mathbf{2}}}{\mathbf{C}}{{\mathbf{O}}_{\mathbf{3}}}$ , sodium(Na) is metal, carbon(C) and oxygen(O) are nonmetals atoms. The bond form between sodium and carbon will be ionic. Also, the bond formed between carbon and oxygen is covalent as both carbon and oxygen are nonmetals. Therefore, ${\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}$ has both covalent and ionic bond.

Hence the correct option is 4.

Learn more:

1. Calculate number of solutes: brainly.com/question/8054051.

2. How many moles of Cl are there in 8 moles of CCl4: brainly.com/question/2094744

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Chemical bonding.

Keywords: Ionic bond, covalent bond, metal, nonmetal, NaI, CO2, Na2CO3, and CH3OH.

Final answer:

Na2CO3 (sodium carbonate) contains both ionic and covalent bonds.

Explanation:

The compound with both ionic and covalent bonds is Na2CO3 (sodium carbonate).

Na2CO3 contains ionic and covalent bonds because it is formed from the reaction between a metal (sodium) and a polyatomic ion (carbonate). The bonds between the sodium and oxygen atoms in the carbonate ion are ionic, while the bonds within the carbonate ion (between carbon and oxygen) are covalent.

Learn more about ionic and covalent bonds here:

brainly.com/question/14509196

#SPJ6

1) This method is a technique used in separating a less-dense substance from a denser one. A. Evaporation. B. Decantation. C. Picking. D. All of the above. 2) What will happen to the less-dense substance of mixtures if you separate them using decantation method? A. Remain the same. B. It will become solid. C. It will evaporate. D. It will float up. 3) In the process of decantation, the mixture is left: A. Behind. B. Undisturbed. C. Removed. D. None of the above. 4) How can the decantation method be useful in everyday life? A. It helps us to become more productive. B. It gives us satisfaction in our everyday living. C. It's just an ordinary technique. D. It helps us to make our everyday living more efficient and easier.

Answers

Answer:

1. B Decantation. 2. D 3. B

Explanation:

This method is often used when dealing with mixtures of liquids or immiscible liquids with different densities

2. This is because the denser substance sinks to the bottom due to its higher density, while the less dense substance remains on the surface. It allows for the separation of the two substances based on their density.

3. The mixture is left undisturbed after the less dense substance has been poured off. This allows the denser substance to settle at the bottom while the lighter substance remains on top

4. It's a handy method for separating substances based on their density For example, if you have a mixture of oil and water, you can use decantation to separate the two. By letting the mixture sit undisturbed, the oil, being less dense, will float to the top, allowing you to carefully pour it off and separate it from the water.

Write a balanced equation for the reaction of NaCH3COO (also written as NaC2H3O2) and HCl.

Answers

The balanced equation is as follows:

$\boxed{{\text{NaC}}{{\text{H}}_3}{\text{COO}}+{\text{HCl}}\to{\text{NaCl}}+{\text{C}}{{\text{H}}_3}{\text{COOH}}}$

Further Explanation:

The chemical reaction that contains equal number of atoms of the different elements in the reactant as well as in the product side is known as balanced chemical reaction. The chemical equation is required to be balanced to follow the Law of the conservation of mass.

Displacement reactions:

These reactions are also known as replacement or metathesis reactions. These types of reactions occur when one of the reactant is replaced by the other one. Usually the more reactive element displaces the less reactive element. Both metals and non-metals can take part in displacement reactions.

Such reactions are generally expressed as follows:

${\text{A}}+{\text{B}}-{\text{C}}\to{\text{A}}-{\text{C}}+{\text{B}}$

Examples of displacement reactions are as follows:

(a) The reaction between copper metal and silver nitrate to form silver metal and copper nitrate as:

${\text{Cu}}+{\text{AgN}}{{\text{O}}_3}\to{\text{Ag}}+{\text{Cu}}{\left({{\text{N}}{{\text{O}}_3}}\right)_2}$

(b) The reaction between chlorine gas and potassium bromide to form potassium chloride and bromine gas as:

${\text{C}}{{\text{l}}_2}+{\text{KBr}}\to{\text{B}}{{\text{r}}_2}+{\text{KCl}}$

The steps to balance a chemical reaction are as follows:

Step1: Complete the reaction and write the unbalanced symbol equation.

In the displacement reaction, sodium acetate $\left({{\text{NaC}}{{\text{H}}_3}{\text{COO}}}\right)$ reacts with hydrochloric acid $\left({{\text{HCl}}}\right)$ to form NaCl and ${\text{C}}{{\text{H}}_3}{\text{COOH}}$ . The physical state of ${\text{NaC}}{{\text{H}}_3}{\text{COO}}$ , HCl, NaCl and ${\text{C}}{{\text{H}}_3}{\text{COOH}}$ is aqueous. The unbalanced chemical equation is as follows:

${\text{NaC}}{{\text{H}}_3}{\text{COO}}+{\text{HCl}}\to{\text{NaCl}}+{\text{C}}{{\text{H}}_3}{\text{COOH}}$

Step2: Then we write the number of atoms of all the different elements that are present in a chemical reaction in the reactant side and product side separately.

• On reactant side,

Number of sodium atom is 1.

Number of carbon atoms is 2.

Number of oxygen atoms is 2.

Number of hydrogen atom is 4

Number of chlorine atoms is 1.

• On product side,

Number of sodium atom is 1.

Number of carbon atoms is 2.

Number of oxygen atoms is 2.

Number of hydrogen atom is 4.

Number of chlorine atoms is 1.

Step3: Initially, we try to balance the number of other atoms of elements except for carbon, oxygen, and hydrogen by multiplying with some number on any side.

Sodium and chlorine atoms are balanced on both sides. Now the reaction is,

${\text{NaC}}{{\text{H}}_3}{\text{COO}}+{\text{HCl}}\to{\text{NaCl}}+{\text{C}}{{\text{H}}_3}{\text{COOH}}$

Step 4: After this, we balance the number of atoms of carbon and then hydrogen atom followed by oxygen atoms.

Carbon, hydrogen, and oxygen atoms are balanced on both sides. Now the reaction is,

${\text{NaC}}{{\text{H}}_3}{\text{COO}}+{\text{HCl}}\to{\text{NaCl}}+{\text{C}}{{\text{H}}_3}{\text{COOH}}$

Step5: Finally, we check the number of atoms of each element on both the sides. If the number is same then the chemical equation is balanced.

The balanced chemical equation is as follows:

${\text{NaC}}{{\text{H}}_3}{\text{COO}}+{\text{HCl}}\to{\text{NaCl}}+{\text{C}}{{\text{H}}_3}{\text{COOH}}$

Learn more:

1. Balanced chemical equation: brainly.com/question/1405182

2. Number of covalent bonds does nitrogen formed with its unpaired: brainly.com/question/5974553

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Chemical reaction and equation

Keywords: Balancing, displacement reaction, NaCl, CH3COOH, CH3COO, NaCH3COO, HCl, atoms, oxygen, carbon, hydrogen, chlorine.

The balance chemical equation is:

NaCH₃COO + HCl → NaCl + HCH₃COO

Make

Ventifacts are created by a process of erosion called A. deflation. B. flow. C. abrasion. D. creep.

Answers

Ventifacts are created by a process of erosion called.
(D.)Abrasion

C. abrasion (by windblown particles)

Simple chem question - please help!Given the equation: N2 +2O2 → 2NO2, what mass of oxygen is required to react completely with 7g of nitrogen?

A) 8 g
B) 16 g
C) 32 g
D) 64 g

Answers

Molar mass O₂ = 32.0 g/mol and N₂ = 28.0 g/mol

N₂ +2 O₂ → 2 NO₂

28.0 g -------> 32.0 * 2
7 g ----------> ?

Mass of O₂ = 7 * 32.0 * 2 / 28.0

Mass of O₂ = 448 / 28.0

= 16 g of O₂

Answer B

hope this helps!

Answer:

guy above is right

Explanation:

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