Classify each living thing of bacteria Please hurry

True. Unit cells in polymers are generally more complicated than metals and ceramics because polymers have molecular arrangements instead of atomic arrangements.

In metals and ceramics, the structure is primarily based on closely packed arrays of atoms, resulting in relatively simple unit cells. These unit cells can be described using simple geometric shapes like cubes or spheres, as atoms are the fundamental building blocks.

However, polymers are composed of long chains or networks of repeating molecular units. The molecular arrangements in polymers can be more complex and varied compared to the closely packed atomic arrangements in metals and ceramics. The repeating units in polymers can have different conformations, orientations, and arrangements, leading to more intricate and diverse unit cells.

Due to the molecular nature of polymers, their unit cells are often irregular or have a higher degree of complexity, reflecting the varied arrangements of the polymer chains. Therefore, the statement that unit cells in polymers are usually more complicated than metals and ceramics due to molecular arrangements is true.

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The students reported is that the Atom must have the same number of protons and neutrons.

An atom is a particle of being counted that uniquely defines a chemical element. An atom consists of a principal nucleus that is surrounded with the aid of one or more negatively charged electrons. The nucleus is undoubtedly charged and carries one or greater exceedingly heavy particles known as protons and neutrons.

The neutron is a subatomic particle, symbol n or n⁰, which has a neutral charge, and a mass barely extra than that of a proton. Protons and neutrons represent the nuclei of atoms.

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Answer:

0.638 moles in 63.8g of calcium carbonate

Explanation:

This suggests that the unknown starting material is likely an organic compound containing a carboxylic acid functional group.

Compound is a combination of two or more elements which are chemically bonded together. Compounds can exist in both organic and inorganic forms, and are formed when atoms of different elements combine to form molecules. Inorganic compounds are generally composed of metal and non-metal elements, while organic compounds are composed of only carbon and hydrogen atoms. Compounds can also be classified according to their physical state, such as solid, liquid, or gas. Compounds are important in many areas of science, such as chemistry, physics, and biology, and play an essential role in the production of many products, including medicines, plastics, and fuels.

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Answer:

The electrons surrounding an atom are located in regions around the nucleus

Brainliest?

Energy levels (also called electron shells) are fixed distances from the nucleus of an atom where electrons may be found.

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Answer:

energy

Explanation:

it is required energy to remove an electron from an atom

When a thermal energy is applied to a container of gas the volume of the gas will increase

Heating a gas makes its atoms and molecules move faster and that way increases the kinetic energy of the particles causing the gas expansion and the increase of its volume and pressure.

Otherwise when the thermal energy is removed, the atoms or molecules start to move slower and become denser until the substance condenses.

It is the energy possessed by a body due to its relative motion. It is usually expressed in Joules (J).

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Answer: Copper (I) Carbide

Explanation:

Copper is a polyatomic ion, meaning it has multiple charges. Carbon has an outer shell consisting of 4 valence electrons so it can either add or lose 4 electrons so it’s charge can be -4 or +4. As said Copper has multiple charges but they are positive, so in this case Cu4 would be 4 +1 charges compared to C which would be -4. Therefore this is a 4:1 ratio, meaning Cu4C is Copper (I) Carbide

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Answer:

The answer is option C.

They identify what phase the substances are in.

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Solution

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Precautions with Potentiometer:

1. emf of the cell connecting in primary circuit must be more than or equal to the emf of the cell of secondary circuit otherwise zero deflection can not be obtained.

2. All the high potential points or positive terminals should be connected at A

3. Balancing length should be calculated from A

4. Area of cross-section of the wire should be uniform otherwise potential gradient will not be constant.

5. Current should not be passing through potentiometer wire for a long time otherwise this will heat up the wire and will changes its resistance and hence potential gradient will also changed.

Answer:

Muscle cell

Explanation:

An example of a specialized cell would be a muscle cell, which allows muscles to contract. A specialized cell has a specific function.

Answer: muscle cell

Explanation: muscle cell

Answer:

–1

Explanation:

The electronic configuration of the neutral atom is given below:

2 8 7

From the electronic configuration of the neutral atom, we can see that the atom has 7 electrons in it's outermost shell. This implies that the element needs 1 more electron to complete it's octet configuration.

Therefore the charge on the ion of the element will be –1 indicating that the atom has received 1 electron to complete it's octet configuration.

Answer:

Explanation:

Average Atomic mass of any element =[ ∑ Abundance* mass of element] /100

                                                                = 10*20 +11*80 /100

                                                                = .........

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In the case of the equilibrium reaction provided, if the concentration of Co(H2O)2+ is increased, the reaction will shift to the right in order to consume the excess Co(H2O)2+ and produce more CoCl2 and H2O.

Conversely, if the concentration of CoCl2 is increased, the reaction will shift to the left in order to consume the excess CoCl2 and produce more Co(H2O)2+ and Cl- ions.

According to Le Chatelier's principle, a change in concentration of one or more of the reactants or products of a chemical reaction at equilibrium will cause a shift in the equilibrium position to counteract the change and re-establish equilibrium.

Specifically, if the concentration of one of the reactants is increased, the reaction will shift in the direction that consumes that reactant in order to restore equilibrium.

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Answer:

With a short life cycle, greenhouse gas fixation ability, and high lipid production capacity, we use cyanobacteria as an efficient biofuel platform. Carbon dioxide released by the burning of fossil fuel and industrial emissions can be captured and used by these organisms efficiently.

Explanation:

What do cyanobacteria use for energy production?

oxygenic photosynthesis

They commonly obtain their energy through oxygenic photosynthesis, which produces the oxygen gas in the atmosphere of Earth. The name cyanobacteria comes from their color (Greek: κυανός, romanized: kyanós, lit.

The number of molecules in 37.93g of magnesium nitrate will be : 0.2568 mol * 6.022x10^23 molecules/mol = 1.55x10^24 molecules.

To determine the number of molecules in a 37.93 gram sample of magnesium nitrate, you would need to know the molar mass of the compound. Magnesium nitrate has a molar mass of 148.31 g/mol.

we can use the formula:

Number of moles = mass (in grams) / molar mass (in g/mol)

Number of moles = 37.93 g / 148.31 g/mol = 0.2568 mol Avogadro's number (6.022x10^23) is the number of atoms, ions, or molecules in one mole of a substance. Therefore, the number of molecules in 37.93g of magnesium nitrate will be : 0.2568 mol * 6.022x10^23 molecules/mol = 1.55x10^24 molecules.

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The heat of solution (qsoln) for the neutralization reaction between nh3 and hcl can be calculated using the heat of neutralization equation: qsoln = -qrxn/moles of solute. The reaction between nh3 and hcl is an exothermic reaction, meaning it releases heat. The balanced chemical equation for the reaction is:

NH3 (aq) + HCl (aq) → NH4Cl (aq)

To calculate qsoln, we need to know the amount of heat released (qrxn) and the number of moles of solute. The heat of neutralization for this reaction is -51.4 kJ/mol. This means that for every mole of NH3 and HCl that react, 51.4 kJ of heat are released. To determine the number of moles of solute, we need to know the amount of NH3 and HCl present in the reaction.

Let's say we have 100 mL of a 0.1 M NH3 solution and we add 50 mL of a 0.1 M HCl solution to it. The total volume of the solution is 150 mL, and the total number of moles of NH3 and HCl is:

moles of NH3 = (0.1 mol/L) x (0.1 L) = 0.01 moles
moles of HCl = (0.1 mol/L) x (0.05 L) = 0.005 moles

The limiting reactant is HCl, so we can use its moles to calculate qsoln:

qsoln = -qrxn/moles of solute
qsoln = -(-51.4 kJ/mol)/(0.005 mol)
qsoln = 10,280 kJ/mol

Therefore, the heat of solution (qsoln) for the neutralization reaction between NH3 and HCl is 10,280 kJ/mol.

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Answer:

Explanation:

V1= 600.0 mL

T1= 293 K

V2 unknown

T2= 333K

Charles law V1*T2=V2*T1

where V1 and T1 are the initial volume and temperature. V2 and T2 are the final temperature and volume.

V2=(V1*T2)/T1 = ( 600.0*333)/293= 682 mL (with significant figures)(681.911 mL before signifcant figures.)

The formation of large molecules from small repeating units is known as a polymerization reaction.

It is a fundamental process in which monomers, which are the individual building blocks, undergo chemical reactions to form a polymer chain.

Through this reaction, monomers are joined together by covalent bonds to create a complex, three-dimensional structure.

Polymerization reactions can occur through different mechanisms, such as addition polymerization and condensation polymerization, depending on the nature of the monomers involved.

The resulting polymers can have a wide range of properties and applications, making polymerization a crucial process in various fields, including materials science, chemistry, and biology.

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Ranking ions from largest to smallest:

Na^+ (11 protons), Mg^2+ (12 protons), F^- (9 protons), O^2- (8 protons), Al^3+ (13 protons)

The given isoelectronic series in order of decreasing radius, from largest to smallest. The given ions have the same number of electrons, but different numbers of protons, which affect the radius of the ion. The more protons an ion has, the greater the attraction between the nucleus and the electrons, which leads to a smaller radius. Therefore, to arrange the ions in order of decreasing radius, we need to consider the number of protons in each ion.

In this case, the ion with the fewest protons is Al^3+ with 13 protons, which will have the smallest radius. The largest ion will be the one with the least attractive force on the electrons. That would be Na^+ with 11 protons. Between these two, we have Mg^2+ with 12 protons, which will have a larger radius than Al^3+ but a smaller radius than Na^+. The two anions, F^- and O^2-, have fewer protons than the cations and are thus larger. Therefore, the order of decreasing radius from largest to smallest is:
Na^+ (11 protons), Mg^2+ (12 protons), F^- (9 protons), O^2- (8 protons), Al^3+ (13 protons)

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To determine the number of moles of hydrogen needed to crack one mole of the long saturated hydrocarbon chain (C40H82), we can analyze the reactants and products involved in the cracking reaction.

The cracking reaction is given as: C40H82 -> 3 C8H18 + n C2H6. From the equation, we can see that one mole of the long hydrocarbon chain (C40H82) produces three moles of octane (C8H18) and n moles of ethane (C2H6). Since the cracking process involves breaking the carbon-carbon bonds and forming new carbon-hydrogen bonds, the number of hydrogen atoms in the products should remain the same as in the reactant.

The long hydrocarbon chain (C40H82) contains 82 hydrogen atoms, and the products, 3 moles of octane (C8H18), contain (3 moles) * (18 hydrogen atoms/mole) = 54 hydrogen atoms. Therefore, the number of moles of hydrogen needed for cracking one mole of the long hydrocarbon chain can be calculated as: Number of moles of hydrogen = 82 - 54 = 28 moles. Hence, 28 moles of hydrogen are required to crack one mole of the long saturated hydrocarbon chain (C40H82).

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Because of their differing nuclear charges, and as a result of shielding by inner electron shells, the different atoms of the periodic table have different affinities for nearby electrons.

The electron affinity is the potential energy change of the atom when an electron is added to a neutral gaseous atom to form a negative ion. So the more negative the electron affinity the more favourable the electron addition process is.

Not all elements form stable negative ions in which case the electron affinity is zero or even positive.

Electron affinity depends on the nuclear charge of an atom.

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Answer:

if we're talking about beryllium then the answer should be 2 because it wants to move 2 spaces back (losing electrons) to become a Nobel gas so the answer is 2+  

Explanation:

it has 2 valence electrons YW :)    

Answer: Mg + FeS ——> Fe + MgS

Explanation: Explain

If an ice cube is melting, its shape and state of matter changes from solid to liquid, while its chemical composition remains the same. Hence, it is a physical change.

When an ice cube melts, only the physical property of the ice cube changes. No new substances are formed, and the chemical composition of the ice does not change, making it a physical change.

A physical change occurs only the physical properties of the substance like colour, shape, density and solubility changes. It is easily reversible. The melted ice can easily be re-frozen back to its solid state. Also, the melting process does not produce any new chemical substance.

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Oxalic acid is a colorless, crystalline, organic compound belonging to the family of carboxylic acids. It is a strong dicarboxylic acid, with the molecular formula \(H2C2O4\).

Given the volume of oxalic acid (h2c2o4) = 50mL

the concentration of oxalic acid = 0.080M

1. Calculate the moles of \(H2C2O4\) needed for the solution:

Moles of \(H2C2O4\) = (50.0 mL x 0.080 M) / 1000 mL = 0.004 moles

2. Calculate the mass of \(H2C2O4\) needed for the solution:

Mass of \(H2C2O4\) = 0.004 moles x 90.03 g/mol = 0.3609 g

3. Place 0.3609 g of \(H2C2O4\) into a beaker and add 50.0 mL of distilled water.

4. Stir the solution to dissolve the \(H2C2O4\).

5. If necessary, add more distilled water to make sure all of the oxalic acid has dissolved.

6. Measure the final volume of the solution and calculate the molarity:

Molarity = (0.004 moles x 1000 mL) / Final Volume (mL)

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The mass of PbI2 produced from a trace amount of 630mL of 0.268M KI solution is 39.2 g.

The equation of the reaction is; 2KI(aq)+Pb(NO3)2(aq) → PbI2(s) + 2KNO3(aq)​

From the question, number of moles of KI = 630/1000 L × 0.268M = 0.169 moles

Now;

2 moles of KI is required to precipitate 1 mole of PbI2

0.169 moles of KI is required to precipitate 0.169 moles × 1 mole/2 moles

= 0.085 moles

Mass of PbI2 = Number of moles of PbI2 × Molar mass

Mass of PbI2 = 0.085 moles × 461.01 g/mol

Mass of PbI2 = 39.2 g

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The sulfur atom in sulfuric acid is bonded to four oxygen atoms, which means there are four bonds attached to the sulfur atom.

The Lewis structure of sulfuric acid, H₂SO₄, can be determined by following these steps:

1. Start by counting the total number of valence electrons for each atom in the molecule. Hydrogen (H) has 1 valence electron, oxygen (O) has 6 valence electrons, and sulfur (S) has 6 valence electrons. Multiply the number of oxygen atoms by their valence electrons to get the total valence electrons for oxygen in the molecule.

2. Place the atoms in a skeletal structure, with the central atom (sulfur) in the middle and the other atoms (hydrogen and oxygen) around it. Connect the atoms with single bonds.

3. Distribute the remaining valence electrons around the atoms to satisfy the octet rule (except for hydrogen, which only needs 2 electrons). The octet rule states that atoms tend to gain, lose, or share electrons in order to achieve a stable electron configuration with 8 valence electrons.

4. If there are any remaining valence electrons, place them as lone pairs on the central atom (sulfur) to satisfy its octet.

In the case of sulfuric acid, the Lewis structure would look like this:

     O
   //
H - S - O
   \\
     O

The sulfur atom in sulfuric acid is bonded to four oxygen atoms, which means there are four bonds attached to the sulfur atom.

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