part A Choose the correct orbital diagram for titanium. A.[Ar] 1 111.11 4s 3d B.[Ar] 111 4s 3d C.[Ar] | 11 111 4s 3d D.[Ar] 12 4s 3d Submit Request Answer

In order to secure reliable sources of rubber, tin, rice, scrap iron and liquid fuel, japan decided it must both seize much of southeast asia and attack united states pacific bases in hawaii and elsewhere

When first created, natural rubber, also known as caoutchouc or India rubber, is made of polymers of the organic compound isoprene, along with water and trace amounts of other organic compounds. The top two producers of rubber are Thailand and Indonesia. Elastomers are a category for different types of polyisoprene that are used as natural rubbers. At the moment, rubber is mostly obtained from rubber trees or other sources as latex. Making incisions in the bark and collecting the fluid in vessels is a process known as "tapping," which removes the latex, a sticky, milky colloid. The rubber created from the refined latex is then ready for industrial processing. Latex is allowed to coagulate in the collection cup in major areas.

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All tissues consist of two main components: cells and extracellular matrix, consisting of a gelatinous substance called ground substance and numerous different protein fibers.

Answer:

sulfur is bigger than oxygen because the number of protons that are present in oxygen is 8, while the total number of protons of sulfur is 16 this clearly states that the size of sulfur is lager because of the higher number of protons and more filled orbitals.

The Solubility cannot be calculated.

Solubility indicates the maximum amount of a substance that can be dissolved in a solvent at a certain temperature. Such a solution is called saturated. Divide the mass of the compound by the mass of the solvent and multiply by 100g to calculate the solubility in g/100g.

The solubility of ionic solutes does not always increase with increasing temperature. In exothermic solution reactions, solubility can decrease with increasing temperature. The number of moles of solute dissolved in a given volume of solution does not represent the solubility of the solution. They dissolve more readily and solubility increases with increasing temperature.

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When 3.45 L of a 0.35 M H₃PO₄  to be diluted to a volume of 10.00 L, The concentration of H₃PO₄ resulted is 0.1207 M

The concentration of H₃PO₄  can be calculated as follows:

Dilution is the process of reducing the concentration of a solute in solution, usually by simply mixing the solute with more solvent by adding water to the solution.

The formula (M1V1=M2V2) represents the dilution formula in chemistry.

M1V1=M2V2

3.45 L x 0.35 M = M2 X 10.00 L

M2 =  3.45 L x 0.35 M

                10.00 L

M2 = 0.1207 M

Therefore, when 3.45 L of a 0.35 M H₃PO₄  to be diluted to a volume of 10.00 L, The concentration of H₃PO₄ resulted is 0.1207 M

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To determine the number of atoms of each element we need to multiply stoichiometry that is written in front of the molecule to the number that is written on the foot of the element. Hence, the balanced chemical equation for the reduction of nitrate ion to gaseous nitrogen dioxide in acidic aqueous solution is NO₂ (g) + H₂O (l) → NO³⁻ (aq) + 2H⁺ + e⁻.

Balanced chemical equation

Balanced equation is defined as the reaction where the number of atoms of each species is same on reactant and product side. In balanced equation mass can neither be destroyed nor be created.

The skeletal equation can be written as:

NO₂ (g) + H₂O (l) → NO³⁻ (aq) + 2H⁺ + e⁻.

The number atoms of N on reactant and product side is 1 so N is balanced.

The number of atoms of H is 2 on reactant and on product side it is 2. So, H is balanced.

The number of atoms of O is 3 on reactant and on product side it is 3. So, O is balanced.

Hence, the balanced chemical equation for the reduction of nitrate ion to gaseous nitrogen dioxide in acidic aqueous solution is:

NO₂ (g) + H₂O (l) → NO³⁻ (aq) + 2H⁺ + e⁻

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Acids include hydrochloric acid (HCl) and bases include sodium hydroxide (NaOH). As a result, when they combine, they have a neutralization reaction that produces water and sodium chloride.

The pH rises to about 7 as a result of neutralization, which happens when a base and a base combine. It is a useful technique that is applied in daily life, for example when lime is added to acid soils to treat and relieve indigestion. Furthermore, neutralization results in an alkali's pH dropping to about seven.

Taking a base balances out our stomach's excess acid. Due to the formic acid in the ant sting, it can be painful. Using wet baking soda, which really is basic in nature, we can counteract this acid impact and lessen the agony brought on by the sting.

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Answer:

if an element has atomic number of 15 then the atom has 15 electrons also.

Option (b)

Explanation:

remember the atomic number of an element is also the number of protons of that element, we know that protons have a positive charge, neutrons have no charge and electrons have a negative charge.

we also know that an element is atomically neutral, meaning it overall has no charge, this is because the positive proton attracts a negative electron and hence their charges cancel off.

this is why in all elements, the atomic number(proton number) will always be equal to the electron number.

Note the neutron number cannot be predicted this way, as far as I know, the neutron purpose is mainly to add Mass to the atom so that it can be more stable, though often times the neutron number is similar to the proton number also. You're not required to learn off atomic masses as far as I know because it will be given to you in the exams

The initial pressure in the 50.0L bulb is 2.75 atm.

According to Boyle's law in a constant temperature, the volume of a gas is inversely proportional to its pressure.  

V ∝ 1/P  

PV = constant.

It is given to us, Initial volume(V) = 250L and Final volume(V') = 50.0 L

Say final pressure is P', that implies initial pressure P = P'- 2.20

Now, according to the concept of Boyle's law, PV = P'V'

⇒P' = PV/V'

⇒P' = (P'-2.20)*250 / 50

⇒P' = 2.75 atm

So, the initial pressure in the 50.0L bulb is 2.75 atm.

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The balanced chemical equation for the combustion reaction of heptane is:

[tex]C_7H_16+11O_2\longrightarrow 7CO_2+8H_2O[/tex]

The chemical equation in which the number of atoms of each type of element is equal on the reactant, as well as the product side of the equation, is known as a balanced chemical equation.

From the law of conservation of mass, the total mass of the elements on either side of the equation must be equal in a balanced chemical equation.

Given the combustion reaction of heptane can be represented as:

[tex]C_7H_16+11O_2\longrightarrow 7CO_2+8H_2O[/tex]

Therefore, the coefficients required to balance the chemical equation are 1, 11, 7, and 8.

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The Lewis structure of the compound is shown in the image attached to this answer.

We know that the Lewis structure shows us what a compound looks like. The two parts of the Lewis structure would include the symbol of the element as well as the electron dots that can be used to show the number of valence electrons. This is why we call the Lewis structire the Lewis dot structure of a compound.

We can see that the compound here has an amine group as well as a carboxylic group and the Lewis structure would tell us the number of electron pairs that we have on the valence shell of  each of the atoms.

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Answer: 0.2 g

Explanation:

The product of the reaction is m-nitrobenzaldehyde, option B.

M-nitrobenzaldehyde, also known as meta-nitrobenzaldehyde is an organic aromatic compound that contains a nitro-group which is meta substituted to an aldehyde. It is soluble in water at 2.34 mg/ml and a temperature of 25° C. It is also soluble in ethanol, benzene and slightly in ether. M-nitrobenzaldehyde production process is prepared by nitration.

The carboxylic group is meta directing and has an ortho-para deactivating group therefore, during nitration of benzaldehyde, meta position gains an attachment from the nitro group forming m-nitrobenzaldehyde as product.

The full question is:

Predict the major product for the reaction shown.

a. o-cyanonitrobenzene & p-cyanonitrobenzene

b. m-nitrobenzaldehyde

c. o-cyanonitrobenzenesulphonic acid & p-cyanonitrobenzenesulphonic  acid

d. m-cyanonitrobenzenesulphonic acid

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For the combustion of 1 mole of diamond at room temperature, the standard entropy change is 6.22 J/K mol.

The reaction is given as :

C (diamond)  + O₂   ----->  CO₂

At room temperature the value of S°  is given as follows :

carbon, C = 2.38 J / Kmol

oxygen, O₂ = 205.2 J/Kmol

carbon dioxide, CO₂ = 213.8 J/Kmol

The standard entropy change is given as :

ΔS° = ∑S° product  - ∑ S° reactant

ΔS° = ( 213.8 ) - ( 2.38 + 205.2)

ΔS° = 213.8 - 207.58

ΔS° = 6.22  J / K mol

The standard entropy change for the combustion of 1 mole of diamond at room temperature is 6.22  J / K mol.

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If in a gas the volume is held constant and the temperature increases, pressure exerted by the gas also increases.

Ideal gas law

The gas law which relates the macroscopic properties of ideal gases is known as ideal gas law. A gas is known as an ideal gas when its particles (a) do not attract or repel one another and (b) take up no space (have no volume). The ideal gas law equation is given as the following,

(PV = nRT)

Where,

P is pressure

V is volume

R is the universal gas constant

T is the temperature and

n is the number of moles

As we can see from the equation that T is directly proportional to P so when V is kept constant and T increases P also increases.

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A science teacher adds water to a strong acid for use in the lab with students. this makes the concentration weaker, because the amount of solute per volume of solvent decreases.

What is meant by concentration of the solution?

There are two components in an aqueous solution: the solute and the solvent. You must be familiar with these two fundamental terminology for solution concentration. The amount of solute in the solution must always be recorded. The quantity of a solute in a solvent is what we refer to in chemistry as the concentration of a solution. We refer to a solution as being concentrated when there is more solute present. Conversely, we refer to a solution as being diluted when it contains more solvent.

There are various methods of expressing the concentration of a solution. You will usually see Chemists working with the number of moles. Pharmacists will use percentage concentrations instead of the number of moles.

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The membrane is not associated with any movement of the na or k across the cell membrane Because the concentration of Na+ is higher outside the cell than inside the cell by a factor of 10.

4A.

Initiated by Influx od Na+

When a nerve is stimulated, Na ions enter in to the axon increasing the positive ions inside the axon. This causes reversal of the potential across the membrane. This is called depolarization which travels alsong the length of the neuron. Such a potential difference carried is called action potential. So, it all srats with influx of Na ions.

4B.

Cells of Macula densa are located in the afferent arteriole.

The above is not the right statement. Macula densa are the modified epithelial cells present in the walls of the distal convoluted tubule. It is not present in the walls of the afferent arteriole. Macula densa is sensitive to Na ion concentration. Low Na ions stimulate the juxta glomerulus to release Reinn which increases the blood pressure in blood vessels.

4C.

It represents the driving pressure for blood flow.

Normal blood pressure is 120/80 mm Hg. Where 120 is systolic pressure and 80 is diastolic pressure. The mean arterial pressure indicates the over all blood flow int he cardiac cycle so that the amount of nutrients reaching a tissue can be estimated. It is the average blood pressure in the cardiac cycle in an individual.

4 D

Arteriole diameter.

When the diameter of arteriole increases, there is more blood flowing in to capillaries with force. Because of increased pressure in arterioles, the capillary blood pressure will also increase. Decrease in colloidal osmotic pressure will decrease blood pressure. Interstitial cell albumin levles will not affect the blood pressure in blood vessels. Less arteriole resistance, blood pressure will reduce.

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The molecular formula of the Allicin is, C₁₈H₃₀S₆O₃ and the empirical formula is C₆H₁₀S₂O

the molecular formula can be calculated as follows:

If a percentage is provided, we will assume that the entire mass is 100 grams.

As a result, each element's mass is equal to the percentage indicated.

C weighs 44.4 g.

H weighs 6.21 g.

S weighs 39.5 g.

O's mass is 9.86 g.

C has a molar mass of 12 g/mole.

H has a molar mass of 1 g/mole.

S has a molar mass of 32 g/mole.

O has a molar mass of 16 g/mole.

first, convert given masses into moles.

Moles of C =      mass C       =    44.4 g      = 3.7 moles

                    molar mass C       12 g/mole.

Moles of H =      mass H       =    6.21 g.      = 6.21 moles

                      molar mass           1 g/mole.

Moles of S =      mass S       =    39.5 g.      = 1.23 moles

                      molar mass          32 g/mole.

Moles of O =        mass O       =    9.86 g.      = 0.62 moles

                      molar mass          16 g/mole.

then we find the mole ratio by divide each value of moles by the smallest number of moles calculated.

For C = 3.7 moles = 5.96 ≈ 6

           0.62 moles

For H = 6.21  moles = 10.01≈ 10

           0.62 moles

For S = 1.23 moles = 1.98 ≈ 2

           0.62 moles

For O = 0.62 moles = 1

             0.62 moles

The ratio of C : H : S : O = 6 : 10 : 2 : 1

The Empirical formula is C₆H₁₀S₂O

The empirical formula weight = 6(12) + 10(1) + 2(32) + 1(16) = 162 gram/eq

Now we have to calculate the molecular formula of the compound.

Formula used :

n= molecular formula = 486 =3

    empirical formula     162

Molecular formula = (C₆H₁₀S₂O)₃ =C₁₈H₃₀S₆O₃

Therefore, the molecular of the compound is, C₁₈H₃₀S₆O₃

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Social engineering types of infiltration techniques does one open up to by posting sensitive personal information and details about one's workplace on social networking sites.

What is the which means social engineering?

Social engineering is an assault vector that is predicated closely on human interplay and frequently includes manipulating human beings into breaking regular safety techniques and satisfactory practices to benefit unauthorized get entry to systems, networks or bodily places or for economic benefit.

Is social engineering a cybercrime?

Social engineering is a manipulation approach that exploits human blunders to benefit personal information, get right of entry to, or valuables. In cybercrime, these “human hacking” scams generally tend to trap unsuspecting customers into exposing data, spreading malware infections, or giving get right of entry to constrained systems.

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The equation to use Hfusion to calculate the energy needed to melt a mass of solid is Grams solid × mol/g × H fusion

what is Hfusion?

The heat of fusion is the amount of heat required to turn 1 g of solid into a liquid without causing a change in temperature.

1Kg×1/H fusion ×g/mol solid

Numerous everyday household products have been produced using the heat of fusion technique, which has numerous other uses. Melting ice into water is the most typical application of the heat of fusion. Manufacturing is where you'll find the great majority of instances of heat of fusion in use. The following examples have been in use for many centuries and are still refined today. Heat of fusion is a necessary step in the production of things such as coins, glass, forged metal, and household goods made from blow-molded plastic.

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Taking into account the definition of calorimetry, the amount of energy needed to raise the temperature is 29,191.25 J.

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is defined as the amount of heat that a body absorbs or releases without changes in its physical state (phase change). In other words, when heat added or removed from a substance causes a temperature change in it without affecting its molecular structure, it is called sensible heat.

The expression that allows to calculate heat exchanges is:

Q = c× m× ΔT

where:

In this case, you know:

Replacing in the definition of sensible heat:

Q= 24.2 J/Kmol× 9.65 moles× 125°K

Solving:

Q= 29,191.25 J

Finally, the amount of energy needed is 29,191.25 J.

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The molar solubility of SrF₂ in 1.3 x 10⁻² M of NaF is = 2.544 x 10⁻⁵ M

The primary distinction between molar solubility and product solubility constant is that the former refers to the rate of dissolution of a substance per liter of a solution, while the latter refers to the dissolving of a solid in an aqueous solution.

We have, Ksp expression for the SrF₂ = 4.3×10⁻⁹

Ksp = [Sr²⁺] [F⁻]²

4.3 x 10⁻⁹ = (x) × (1.3 x 10⁻²)²

or, x = (4.3 x 10⁻⁹) / (1.3 x10⁻²)² M

or, x = 2.544 x 10⁻⁵ M

Molar solubility of SrF₂ in 1.3 x 10⁻² M of NaF is = 2.544 x 10⁻⁵ M.

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Equations 1 & 2, Equations 2&3, and Equations 1&3 illustrate a favorable energetic coupling in a cell.

What is the non-spontaneous reaction?
A nonspontaneous reaction is one that under the specified conditions, does not favour the formation of products. A reaction needs to be endothermic, accompanied by the a drop in entropy, or both to qualify as nonspontaneous. The majority of the gases that make up our atmosphere are a combination of nitrogen and oxygen.

If G is positive, the reaction is not spontaneous and will need external energy. The reaction seems to be spontaneous and will happen on its own if G is negative.

Coupling of reactions-
Equations 1 and 2-
∆G1=-7kcal/mol, ∆G2=-14.8kcal/mol
∆G total= -21.8kcal/mol( favourable reaction)
Equation 2&3-
∆G2=-14.8kcal/mol, ∆G3=+3.3kcal/mol
∆G total=-11.5kcal/mol(favourable)
Equations 3 and 4-
∆G3=+3.3kcal/mol, ∆G4= +7kcal/mol
∆G total=+10.3kcal/mol(unfavorable)
Equations 1 and 4-
∆G1=-7kcal/mol, ∆G4=+7kcal/mol
∆G total= 0(reaction will be in equilibrium)
Equations 1 and 3-
∆G total=(-7+3.3)kcal/mol
=-4.3 kcal/mol(favorable)

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There are two molecular orbitals are needed to form one bonding molecular orbital and one anti-bonding molecular orbital.

Bond orbitals Electrons that spend most of their time between the nuclei of two atoms are placed in bonding orbitals, and electrons that spend most of their time outside the nuclei of two atoms are placed in anti-bonding orbitals.

Adding up the same number of atomic orbitals gives the same number of molecular orbitals. Two atomic orbitals combine to form two molecular orbitals. An anti-bonding orbital is essentially the opposite of a bonding orbital. They form when atomic orbitals combine in ways that lead to almost destructive interference.

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Ionic bonding is expected in KF because in it one is metal and one is non-metal which is essential to form an ionic bond.

What is Ionic bonding?

Ionic bonding is a kind of chemical bonding that includes the electrostatic attraction among oppositely charged ions, or among two atoms with sharply different electronegativities, and is the number one interplay taking place in ionic compounds. It is one of the primary styles of bonding alongside with covalent bonding and metal bonding. Ions are atoms (or organizations of atoms) with an electrostatic charge. Atoms that advantage electrons make negatively charged ions (called anions). Atoms that lose electrons make undoubtedly charged ions (called cations). This switch of electrons is thought as electrovalence in assessment to covalence.

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Pyruvate is produced by the reaction of a glycolysis. The multienzyme complex catalyzes the oxidative of pyruvate to yield carbon dioxide and acetyl coa. Its reaction is given as

Pyruvate+CoA+NAD⁺→acetyl CoA+NADH+H⁺+CO₂

Acetyl CoA→Citric acid cycle

Glycolysis process is defined as the conversion of a glucose(C₆H₁₂O₆) into the pyruvate(CH₃COCO₂H). In the glycolysis reaction, high energy ATP molecules and reduced nicotinamide adenine dinucleotide is created. The series of ten enzyme-catalyzed process makes up glycolysis.

One of the metabolic route which does not require is glycolysis(In anaerobic conditon, pyruvate is converted to lactic acid). It is occurred in various species, which tells us that it is old metabolic route.

Therefore, the glycolysis reaction produces pyruvate and its complete reaction is

Pyruvate+CoA+NAD⁺→acetyl CoA+NADH+H⁺+CO₂

Acetyl CoA→Citric acid cycle

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Answer:

A fire could cause an increase in evaporation of water from surface water near the fire.

Explanation:

Answer:

Explanation:

Wildfires can compromise water quality both during active burning and for months and years after the fire has been extinguished. Burned watersheds are prone to increased flooding and erosion, which can negatively affect water-supply reservoirs, water quality, and drinking-water treatment processes.

Wildfires can have immediate and long term effects on rivers, lakes, and streams. After burning vegetation, the ground's soil becomes hydrophobic and is unable to absorb any water. This creates what is known as stormwater runoff. Stormwater runoff is rainflow that travels over the surface of the ground.

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The Glycolysis produces pyruvate.

What is pyruvate?

Pyruvate is a three-carbon molecule which is the end product of glycolysis, the first step in the breakdown of glucose for energy. It is also the starting point for the Krebs cycle, the second stage of cellular respiration. Pyruvate is formed from the cleavage of the six-carbon sugar molecule, glucose, and is then further oxidized to form acetyl-CoA and enter the Krebs cycle. The enzymes responsible for pyruvate production are known as pyruvate kinases and are found in most eukaryotic cells. Pyruvate is an important molecule in the production of energy within the cell, as it acts as both a source of energy and a precursor to other metabolic pathways. Additionally, pyruvate is involved in the synthesis of fatty acids, amino acids, and other biomolecules. Pyruvate is also used in the fermentation process to produce lactic acid and ethanol.

The pyruvate dehydrogenase (PDH) enzyme is part of the multienzyme PDC, which catalyzes the physiologically irreversible decarboxylation of pyruvate to acetyl-CoA and is often referred to as a 'gatekeeper' in the oxidation of carbohydrate.

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The orbital diagram of the eight electron atom is shown in the image attached.

The Hund's rule states that the electrons that are found in atom must be filled singly first before pairing can occur. In this case we are dealing with an atom that has a total of eight electrons.

In looking at the orbital diagram, we are going to observe that the five orbitals would first be filed then we would now start to pair the orbitals until we fill in all of the eight electrons as shown in the image attached.

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Answer:

We have an electron that has six electrons, and there are two electrons that singly occupy the 2p orbitals. According to Hund's rule, electrons arise singly in an atom before pairing occurs.

Explanation: