How do you number the groups of a periodic table?

Answer: H₂SO₄ is the chemical formula that represents sulfuric acid.

Explanation:

1) H stands for hydrogen and H₂ means that each unit contains two atoms of hydrogen.

2) S stands for sulfur. Since there is not subscript, means each unit contains one atom of sulfur.

3) O stands for oxygen, and O₄ means that each unit has four oxygen atoms.

4) The way the compound is build up is the S atom at the center with two double bonds to each to one atom of O, and two single bonds one to each OH ion.

5) Sulfuric acid is a strong acid, so it dissociates in water and alghough the formula H₂SO₄ is used to represent it, the aqueous solution is formed by ions: HSO₃⁻, H⁺, SO₄²⁻, and OH⁻, as represented by these dissociation equaitons show:

1) H₂SO₄ ⇄H⁺ + HSO₄⁻ first dissociation

2) HSO₄⁻ ⇄ H⁺ + SO₄²⁻ second dissociation

So, H₂SO₄ is one form to represent sulfuric acid.

Final answer:

In an aqueous solution, H₂SO₄ represents sulfuric acid.

Explanation:

In an aqueous solution, H₂SO₄ represents sulfuric acid. Sulfuric acid is a strong diprotic acid that ionizes in two stages. The first stage is essentially complete in an aqueous solution, while the secondary ionization is less complete, resulting in the formation of HSO₄⁻, which is a moderately strong acid.

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Answer: A solid-state component with three layers of semiconductors is a transistor.

Explanation:

A device with the help of which current or voltage is regulated and for electronic signals it acts as a switch or gate is known as a transistor.

A transistor has three layers of semiconductors. Each of these layers are capable of carrying current.

Thus, we can conclude that a solid-state component with three layers of semiconductors is a transistor.

Physical change.

Explanation:

• This is a physical change.

• The reason for escaping pops is the water caught internal parts it's bit.
• Inside the event that the bit is warmed to a tall satisfactory temperature, this water will modify into steam. Due to the troublesome and for the preeminent parcel nonporous shell, the steam has no put to go, coming nearly in a buildup of weight internal parts the bit.
• Once the weight gets tall satisfactory and the temperature comes to around 180 degrees Celsius (355 degrees Fahrenheit), the pops escape from the skillet or bursts and the popcorn is turned internal parts out.

Answer: The correct answer is Option 2.

Explanation:

Covalent bond is defined as the b which is formed by the sharing of electrons between the atoms forming a bond.

Non-polar covalent bond is defined as the bond which is formed when there is no difference in electronegativity between the atoms. When atoms of the same element combine, it results in the formation of non-polar covalent bond. For Example: etc..

For the given options:

• Option 1:  

Hydrogen is the 1st element of the periodic table having electronic configuration

This element needs 1 electron to attain stable electronic configuration and will form single covalent bond with another hydrogen atom.

• Option 2:  

Nitrogen is the 7th element of the periodic table having electronic configuration

This element needs 3 electrons to attain stable electronic configuration and will form triple covalent bond with another nitrogen atom.

• Option 3:  

Oxygen is the 8th element of the periodic table having electronic configuration

This element needs 2 electrons to attain stable electronic configuration and will form double covalent bond with another oxygen atom.

• Option 4:  

Chlorine is the 17th element of the periodic table having electronic configuration

This element needs 1 electron to attain stable electronic configuration and will form single covalent bond with another chlorine atom.

Hence, the correct answer is Option 2.

Answer is: (2) C6H12O(s) and HCl(g).

Covalent bond is bond between nonmetals.

Carbon, hydrogen, chlorine and oxygen are nonmetals.

Hydrogen chloride (HCl) has polar covalent bond between hydrogen and chlorine.

Potassium iodide (KI) and sodium chloride (NaCl) are ionic compounds.

Ionic bond is the electrostatic attraction between oppositely charged ions (cations and anions).

Among the four options, option (2) C6H12O(s) and HCl(g) represent covalent compounds as they consist only of nonmetals.

The question asks which of the given sets of substances are covalent compounds. Covalent compounds are formed when two nonmetals combine. By looking at the given options, option (2) C6H12O(s) and HCl(g) correspond to covalent compounds. C6H12O(s) is glucose, a sugar composed of carbon (C), hydrogen (H), and oxygen (O) - all nonmetals. Likewise, HCl(g) is hydrochloric acid, composed of hydrogen (H), a nonmetal, and Chlorine (Cl), another nonmetal. The other options include substances like KI and NaCl which are ionic compounds, not covalent, because they are formed from a metal and nonmetal.

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The volume of the rock is 7mL. The correct option is c)7ml

From the question,

We are to determine the volume of the rock.

When an object is submerged in a container containing a liquid, the submerged object displaces a volume of liquid equal to the volume of the object.

That is,

Volume of object = Final volume - Initial volume

From the given information,

Initial volume = 40mL

Final volume = 47mL

∴ Volume of the rock = 47mL - 40mL

Volume of the rock = 7mL

Hence, the volume of the rock is 7mL. The correct option is c)7ml

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