How are carbon nanotubes formed? What are some interesting properties and applications for carbon nanotubes?

Q: How does the Mineral Family- Sulphides are used in everyday life and in Engineering activities?

A: A sulphide mineral is a member of a group of compounds of a metal with sulphur.

Q: Suppose that a semiconductor device is using a 9.79-mg sample of a hypothetical element By, that is…

A: A numerical problem based on mole concept, which is to be accomplished.

Q: One of the following molecules is a solid at room temperature. Which one? Why? a. Br2 b. I2 c. F2 d.…

A: Option b. I2 is the correct optionA element to be solid at room temperature, It must have very…

Q: Name the sodium compound which is used for softening hard water.

A: Sodium carbonate is called as washing soda.  It was removed the temporary and permanent hardness…

Q: 1) What does number of bonding electrons per atom (e/a ratio) means? How does it affect the crystal…

A: Given: We have to tell how the number of bonding electrons per atom affect the crystal structure in…

Q: What are Intermetallic compounds? Give some examples?

A: The definition of Intermetallic compounds with examples has to be given,

Q: 10. Oxygen plays a major role in biological molecules. a role in polarity, bond Explain how oxygen…

A:

Q: Which substances have the lowest melting points: ionic, covalent, or metallic? What does the low…

A: The temperature at which a solid change into a liquid state is known as the melting point. The value…

Q: Why are lithium compounds soluble in organic solvents?

A:

Q: Discuss nanocarbons and its three classes: fullerenes, carbon nanotubes, and graphene.

A: Nanocarbons are carbon-based nanomaterials, and have unique physico-chemical properties.

Q: Some scientists have suggested that life on other planets in the universe may be based on silicon…

A: Given: Some scientists have suggested that life on other planets in the universe may be based on…

Q: Why are nitro compounds commercially used as explosives?

A:

Q: Tom put a piece of butter into the hot iron pan. Which of the following is an example of conduction?…

A: Heat is exchanged between substances in direct contact by conduction, which is the process of…

Q: Briefly explain why steel, an alloy of iron, is usedto build the supporting structure of many…

A: Given: Why steel, an alloy of iron, is used to build the supporting structure of many buildings.

Q: Could sodium carbonate (Na2CO3) be used for the same common uses as sodium bicarbonate (NaHCO3)? Why…

A: The question is based on the concept of chemistry in day to day life. we have to explain the usage…

Q: How can this effect be achieved through CO2 or dry ice? What does LPG stand for? How can a gas be…

A: The process of liquefying a gas, which transforms it from a gas to a liquid, is known as the…

Q: Which may form +1 or +3 ions, depending on the conditions? A) gold  B) postassium C) silicon

A: Transition metal placed between s-block and p-block elements and they are termed as d block…

Q: Suppose that a semiconductor device is using a 10.51-mg sample of a hypothetical element By, that is…

A: Given: Mass of By = 10.51 mg = 0.01051 g                                 (Since 1 g = 1000 mg)…

Q: Suppose that a semiconductor device is using a 11.45-mg sample of a hypothetical element By, that is…

A: Given, Weight of By = 11.45 mg By is doped with 1.22% (by mole) of another hypothetical element Do.…

Q: 18. How do you determine the molecular shape of the portion of the molecule where carbon, whose…

A:

Q: There are two types of carbon nanotube structures. These tubes differ in different structural…

A: Carbon nanotubes:The cylindrical molecules that consists of rolled-up sheets of single-layer carbon…

Q: what is the difference between bonding forces holding compounds together and other attractive…

A: The compound is formed by elements combined in a fixed ratio.

Q: Suppose that a semiconductor device is using a 8.41-mg sample of a hypothetical element By, that is…

A: Atomic mass of hypothetical element By is 33.916 g mol-1 Given mass of By is 8.41 mg  That is…

Q: What is the dot structure for H3O+?

A:

Q: One famous application of nanomaterials are in the cosmetic industry, identify the nanometrials used…

A: Nanomaterials are those material which has at least one of its dimension in nano range, that is…

Q: Suppose that a semiconductor device is using a 9.37-mg sample of a hypothetical element By, that is…

A: Mass of sample = 9.37 mg No of atoms of Do = ?

Q: Which is TRUE regarding the conduction of electricity at regular conditions for metals, nonmetals…

A: Option A is correct answer.

Q: what parts of the earth make up the Lithosphere?

A: lithosphere

Q: Draw a dot and cross diagram to show the arrangement of outer electrons in a molecule of silicon…

A: Dot and cross diagram follow Octet rule in most of the cases. According to this rule atoms tend to…

Q: beads

A: The force of interaction between similar molecules is called cohesion and the force of interaction…

Q: The structure and bonding of carbon dioxide and silicon dioxide both differ from each other. State…

A: Both silicon dioxide and carbon dioxide differ with each other in bonding and structure  silicon…

Q: True or false? SEM can investigate the crystalline structure of an object

A: SEM microscope can be defined as a  microscope that scan the image of an object.

Q: Heating and cooling of iodine, l2. (i) What happened when the iodine was heated in the test-tube?.…

A: (i) The element iodine present as a black-bluish solid at room temperature.  When iodine in the test…

Q: stringent health are needed for- tor materials.

A: one of the most important properties of semiconductor materials is that their conductivity can be…

Q: all about crystal structure of NaCl

A:

Q: What is Plaster of Paris chemically? How is it prepared? List its two important uses ?

A: Plaster of paris is an important compound of calcium. The plaster of paris occurs as a white powder.…

Q: Properties "X" Melting Point (°C) 800 BO 1200 Soluble in water yes no no no по Yes Solid state…

A: Metal are good electrons donors and also they have high melting point and conducts electricity in…

Q: Carbon naturally occurs in two forms: diamond and graphite. Why do these two forms have very…

A: Carbon is an element in periodic table with atomic number 6. It has an unusual property of…

Q: What is the use of evaporating the solution with concentrated sulfuric acid?

A: Evaporation is process by which substance convert from its liquid state to its gaseous state.

Q: State one of the chemical requirements for biomaterials. Explain your answer.

A: Biomaterial is a natural or synthetic material which is used to make devices used to replace a part…

Q: How does the Mineral Family- Halides is used in everyday life and in Engineering activities

A: Answer - Mineral Family- Halides - Halide mineral, any of a group of naturally occurring inorganic…

Q: Consider a lithium atom.  Describe its structure: what are its parts and how are they arranged? You…

A: Lithium, atomic structure C018/3684 Rights Managed 74.5 MB (74.0 MB compressed) 5197 x 5008…

Q: Question 9 Using complete sentences, list the three allotropes of carbon and describe the structure…

A: There are three allotropes of carbon. The structure and properties of each allotrope of carbon is…

Q: What are the reactions involved in producing sulfuric acid from sulfur? Wh is this industry…

A: Sulfur dioxide and oxygen which is passed over a hot catalyst unite to form sulfur trioxide which in…

Q: the structure of

A:

Q: What are the uses of chlorine is it used as refrigerant or explosives, what are the uses?

A: It is used to disinfect water and is part of the sanitation process for sewage and industrial waste.…

Group 14 Elements

The following elements come under group 14 of the periodic table.