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Anonymous
Anonymous
Asked: January 20, 2022Category: Chemistry

Why are metallic compounds solid at room temperature?

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    Anonymous
    Added an answer on January 20, 2022 at 12:52 pm

    The metallic elements are solid at room temperature because they have a high energy level. Metals conduct heat and electricity well, which is one of the properties that makes them useful in construction. They also tend to be malleable, meaning they can easily be molded into products. All metallic coRead more

    The metallic elements are solid at room temperature because they have a high energy level.

    Metals conduct heat and electricity well, which is one of the properties that makes them useful in construction.

    They also tend to be malleable, meaning they can easily be molded into products. All metallic compounds contain metals (such as iron, nickel, cobalt), and some contain other elements such as oxygen or sulfur.

    The main reason that metals are solid at room temperature is that the electrons in the metal atoms can move freely around. This is called metallic bonding, and it allows for electrical conductivity.

    The metallic bond also makes them malleable (i.e., capable of being bent into different shapes).

    Other reasons that metals are solid at room temperature include the following: The atoms in a metal are tightly packed together.

    During melting, heat is required to separate the atoms and rearrange them into new positions.

    This requires energy because it takes work to push or pull objects apart. The added heat also makes the electrons move faster, which increases the metal’s energy level. Solid metals are very hard.

    It takes a lot of heat to melt them, and even more, heat to evaporate them (that is, change from solid to gas).

    These processes require a great deal of energy because they involve releasing heat that is stored in solid metal.

    When a liquid is heated, the molecules move faster and their atoms become more spread out.

    The opposite happens when they cool down; the molecules slow down and come closer together again to form solids.

    In metallic compounds, there are so many electrons that it takes an enormous amount of energy to move them to a place where they can be absorbed by other atoms.

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Anonymous
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Anonymous
Asked: October 11, 2021Category: Chemistry

Proteins differ from one another because

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  1. Expert Verified
    CrazyMan Guru
    Added an answer on November 21, 2021 at 1:03 pm

    Proteins differ from one another because the sequence of amino acids in the polypeptide chain differs from protein to protein. The sequence of amino acids in a given protein is determined by the order and type of nucleotides in its genetic code. [adinserter block="7"] Proteins may be simple or complRead more

    Proteins differ from one another because the sequence of amino acids in the polypeptide chain differs from protein to protein. The sequence of amino acids in a given protein is determined by the order and type of nucleotides in its genetic code.

    Proteins may be simple or complex. Some proteins are single polypeptides made of several hundred amino acids, whereas others have thousands of subunits—polypeptides that are themselves chains consisting of 20 to 100 amino acids.

    Proteins with large numbers of subunits are often globular, spherical structures called oligomeric proteins.

    Some oligomeric proteins have thousands of subunits. Many of these complex, multisubunit protein molecules are enzymes that catalyze a chemical reaction in one step and then split up into their component polypeptides to repeat the process when another molecule is available for catalysis.

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Anonymous
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Anonymous
Asked: October 11, 2021Category: Chemistry

Tertiary structure is NOT directly dependent on

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    CrazyMan Guru
    Added an answer on November 21, 2021 at 1:06 pm

    Tertiary structure is not directly dependent on peptide bonds. Peptide bonds are covalent bonds that form between two amino acids. [adinserter block="7"] They are formed when the carboxyl group of one amino acid is attached to the amine group on another, through a condensation reaction. This happensRead more

    Tertiary structure is not directly dependent on peptide bonds. Peptide bonds are covalent bonds that form between two amino acids.

    They are formed when the carboxyl group of one amino acid is attached to the amine group on another, through a condensation reaction. This happens during protein synthesis (translation) and results in the formation of polypeptides.

    Tertiary structure is dependent on the peptide bonds of the protein. However, it does not depend on any particular one or set of bond(s). It depends upon all amino acids in their entirety and how they are arranged in 3D space.

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Anonymous
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Anonymous
Asked: October 10, 2021Category: Chemistry

Removal of carbon particles from air involves the principle of

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  1. Expert Verified
    CrazyMan Guru
    Added an answer on November 21, 2021 at 1:09 pm

    Removal of carbon particles from air involves the principle of Electrophoresis. Electrophoresis is a process in which charged particles move under the influence of an electric field. These particles are moved according to their charge and mass. [adinserter block="7"] For example, when you rub your hRead more

    Removal of carbon particles from air involves the principle of Electrophoresis. Electrophoresis is a process in which charged particles move under the influence of an electric field. These particles are moved according to their charge and mass.

    For example, when you rub your hand on velvet fabric, you can observe that all dust particles fall off due to electrostatic force between the dust particle and the fabric.

    This is because all the dust particles are negatively charged while velvet fabric is positively charged.

    The adsorption process involves applying a positive charge to the carbon nanoparticles in order to pull them toward an electrode.

    A negatively charged counter electrode helps by pulling back on the carbon particles, moving them against their own electric field, and forcing them out of the filter.

    The process is repeated thousands of times, with the carbon particles getting smaller and smaller as they pass through more filters. The clean air that comes through is then ready to be inhaled by people or used in industrial processes.

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Anonymous
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Anonymous
Asked: October 10, 2021Category: Chemistry

Which choice best describes the polarity of BrF5?

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  1. Expert Verified
    CrazyMan Guru
    Added an answer on November 21, 2021 at 1:18 pm

    Polar bonds or polar molecules best describe the polarity of BrF5. [adinserter block="7"] What is polarity? The polarity of a molecule is its ability to dissolve in water. Polar molecules are soluble in water, while non-polar molecules are insoluble in water. Water has polar properties because it coRead more

    Polar bonds or polar molecules best describe the polarity of BrF5.

    What is polarity?

    The polarity of a molecule is its ability to dissolve in water. Polar molecules are soluble in water, while non–polar molecules are insoluble in water.

    Water has polar properties because it contains both positive and negative charges (or electrons) that attract opposite charges on the opposite side of the molecule.

    The polar molecule dissolves in water because the polarity of the molecule fits with that of the water.

    Explain the polarity of BrF5

    BrF5 has five fluorine atoms, each with one electron in its outer shell. The lone pairs of electrons on the fluorine atoms are not assigned to any particular molecule but instead form a bond between all of the fluorines.

    This makes BrF5 a polar molecule because it contains significantly more electrons than protons, which are positive charges. The polar molecule dissolves in water because water has positively and negatively charged areas that hold the molecules together.

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aalan
Anonymous
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Anonymous
Asked: October 10, 2021Category: Chemistry

All phosphorus atoms have the same

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  1. Expert Verified
    CrazyMan Guru
    Added an answer on November 21, 2021 at 1:24 pm

    All phosphorus atoms have the same atomic number. [adinserter block="7"] Explanation The atomic number is always equal to the number of protons in an atom, and the electrons surrounding the nucleus have no effect on this. Phosphorus atoms all have 15 protons, so they must also all have 15 electronsRead more

    All phosphorus atoms have the same atomic number.

    Explanation

    The atomic number is always equal to the number of protons in an atom, and the electrons surrounding the nucleus have no effect on this.

    Phosphorus atoms all have 15 protons, so they must also all have 15 electrons around them. In addition, each of these electrons will be negatively charged (because of the electron‘s attraction to the positive nucleus), and they will all occupy different energy levels.

    Therefore, phosphorus atoms have 15 protons and 15 electrons. The number of neutrons is irrelevant; there are no neutrons present in elemental phosphorus. If we take two phosphorus atoms (P–32) as an example, they will have 15 protons and 30 electrons.

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Anonymous
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Anonymous
Asked: October 10, 2021Category: Chemistry

In hydrolysis reactions compounds react with

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  1. Expert Verified
    CrazyMan Guru
    Added an answer on November 21, 2021 at 1:29 pm

    In hydrolysis reactions, compounds react with water, causing decomposition. [adinserter block="7"] What is Hydrolysis? Hydrolysis is the decomposition of a substance in water. This process occurs when an acid or base reacts with water, forming another substance and releasing heat energy. For exampleRead more

    In hydrolysis reactions, compounds react with water, causing decomposition.

    What is Hydrolysis?

    Hydrolysis is the decomposition of a substance in water. This process occurs when an acid or base reacts with water, forming another substance and releasing heat energy.

    For example, salt (sodium chloride) will react with water to form sodium hydroxide and hydrogen gas:

    NaCl + H 2 O → NaOH + H 2

    The salt breaks down into its base and acid components, which then combine to form sodium hydroxide (lye) and hydrogen gas.

    Explanation: Hydrolysis reactions involve the cleavage of a chemical bond by the addition of water. It usually involves an ester, amide, or carbonic acid (or its derivatives) and is industrially very important as it is involved in saponification (the breakdown of fats into soap).

    Compounds react with water to form hydrogen ions and the compound in its ionized (or hydrated) state. Examples – Sodium bisulfate, or sodium hydrogen sulfite reacts with water by giving sodium ions and sulfuric acid esters.

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Anonymous
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Anonymous
Asked: October 10, 2021Category: Chemistry

Reactions that require CO2 take place in

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  1. Mighty Ashish Guru
    Added an answer on October 10, 2021 at 11:41 am

    Explanation: Option A is the correct answer!!! Reactions that require CO2 take place in the Calvin cycle alone.

    Explanation:

    Option A is the correct answer!!!

    Reactions that require CO2 take place in the Calvin cycle alone.

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Anonymous
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Anonymous
Asked: October 10, 2021Category: Chemistry

A ‘breath test’ used by traffic police to check drunken driving uses ____?

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  1. Mighty Ashish Guru
    Added an answer on October 10, 2021 at 10:23 am

    Explanation: It a test to check the presence of alcohol in a person's blood & carried out on samples of breath provided by the person. It is done with the help of filter paper made of Potassium dichromate-sulfuric acid.

    Explanation:

    It a test to check the presence of alcohol in a person’s blood & carried out on samples of breath provided by the person.

    It is done with the help of filter paper made of Potassium dichromate-sulfuric acid.

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Anonymous
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Anonymous
Asked: October 10, 2021Category: Chemistry

How many electrons are there in Na+

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  1. Mighty Ashish Guru
    Added an answer on October 10, 2021 at 10:07 am

    Explanation: There are 10 electrons present in Na+. The atom of sodium has 11 electrons, 11 protons along with 12 neutrons, but Na+ contains one less electron, 11 protons along with 12 neutrons, as the ion has lost 1 electron.

    Explanation:

    There are 10 electrons present in Na+. The atom of sodium has 11 electrons, 11 protons along with 12 neutrons, but Na+ contains one less electron, 11 protons along with 12 neutrons, as the ion has lost 1 electron.

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