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

Answers

Answer 1

Answer:

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.

Answer 2

Answer:

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

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Which of the following is an exothermic reaction?A.) dissolving sugar in water

B.) melting ice

C.) condensing steam

D.) dissolving ammonium nitrate in water

Answers

Answer:

C.) condensing steam

Explanation:

Exothermic reactions are chemical reaction which energy is released to the environment in the form of heat . The overall energy of the reactant is greater than the energy of the product. The higher in energy of the reactant causes a release of heat to the environment. In exothermic reactions, enthalpy change is usually negative and is accompanied by the loss of energy in the form of heat or light.

Condensation is the change of water vapor to liquid . The conversion is an exothermic reaction as energy is release to the environment in the form of heat. The water vapor molecules has higher energy than liquid. The changes of water vapor to liquid causes a loss in energy of the water vapor. As the water vapor loss more energy, heat is been release to the surrounding.

All other reaction are endothermic in which heat is absorb from the environment except for condensation of steam.

The event that is an example of an exothermic reaction is condensing steam. The answer is letter C. An exothermic reaction is one in which there is a release of heat during the reaction. Dissolving sugar in water, melting ice and dissolving ammonium nitrate in water are all examples of an endothermic reaction.

Which sample of HCl(aq) contains the greatest number of moles of solute particles?(1) 1.0 L of 2.0 M HCl(aq)
(2) 2.0 L of 2.0 M HCl(aq)
(3) 3.0 L of 0.50 M HCl(aq)
(4) 4.0 L of 0.50 M HCl(aq)

Answers

The answer is (2) 2.0 L of 2.0 M HCl (aq). The number of moles of solute particles equals to the volume multiply the concentration of the solution. After the calculation, you can get the right answer.

Answer:

Explanation:

Insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. A bottle contains 525 mL of insulin at a concentration of 50.0 mg/mL . What is the total mass of insulin in the bottle?

Answers

26.25 ? I am not sure about my answer ;;-;;

The dopamine molecule has an intermediate hydrophobicity. Edit the dopamine molecule so that it is more hydrophobic.

Answers

You should edit the dopamine molecule by tampering with its polar groups. Polar groups affect chemical's physical properties including hydrophobicity.

Which atom in the ground state has a partially filled second electron shell?hydrogen atom
lithium atom
potassium atom
sodium atom

Answers

The atoms having partially filled shells have orbitals with electrons half or less than the number of electrons that can be accomodated in it. The atom which has a partially filled second electron shell in the ground state is lithium.

What is lithium?

Lithium is 3rd element in periodic table and thus having 3 electrons in it. The main shell electronic configuration of lithium is written as K=2, L=1. Thus the second shell L has only one electron and it is said to be partially filled.

The element hydrogen is having only one electron located in the K shell and it have o more shells which are filled.

The elements sodium and potassium are first group elements sodium with 11 electrons and potassium atom with 19 electrons. Both are having 3 main shells and one electron in the last shell. Thus their second shell is completely filled.

Hence, the atom which have partially filled second electron shell in the ground state among the following is lithium. Thus, option B is correct.

To find more about lithium, refer the link below;

brainly.com/question/27642226

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Atoms have electrons filled in energy shells.
1. H - hydrogen atom has one electron in the First energy shell. Therefore hydrogen has a partially filled first energy shell

2.Li - Li electron configuration is 2,1
The outermost energy shell is the second energy shell in which there is only one electron
Therefore the second energy shell is partially filled. This is the correct answer

3. K - electron configuration is 2,8,8,1
The outermost energy shell is the fourth energy shell which is partially filled. The second energy shell is completely filled

4.Na - electron configuration is 2,8,1
The outermost energy shell is the third energy shell which is partially filled
Second energy shell is completely filled

From the given options Li is the only element with a partially filled second energy shell
Answer is Li

Please help me with this question number 22

Answers

If I remember correctly 1 Cal (capital C) is equal to 1000 cal (lower case c) where Cal is used in nutrition since 1 cal is actually relatively small. If I am write about that, the answer should be 138Cal (nutritional calories) equals 138000cal. Therefore I think the answer is 138000cal.

I hope this helps. Let me know in the comments if anything is unclear.

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