Atoms of which pair of elements will form ionic bonds in a compound?

Dalton's atomic theory was proposed by John Dalton in 1803. It states that elements are made up of indivisible atoms, atoms of the same element are identical, and atoms cannot be created or destroyed.

Dalton proposed that the concept of atoms might be used to explain the laws of definite proportions and the conservation of mass. In his theory, atoms—which he described as "solid, massy, hard, impenetrable, moving particle(s),"—are the minuscule, indivisible units that make up all matter.

It is significant to highlight that Dalton had no knowledge of the potential existence of interior structure in atoms because he lacked the tools necessary to observe or perform further experiments on individual atoms. In a molecular modeling kit, where the various components are represented by spheres of various sizes and hues, we may imagine Dalton's atom as a component. We now know that atoms are not solid spheres, despite the fact that this paradigm is useful in some situations.

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Answer:

50km per hour.

Part of the speed, distance, time triangle.

To get speed, just divide distance by time. 150/3=50

Answer:

hydrogen bonds

Explanation:

this is because the type of bonding occurs between electropositive forces.

Water molecules have a polarity, which allows them to be electrically attracted to other water molecules and other polar molecules by Hydrogen bonds.

Hydrogen Bond

Between a hydrogen (H) atom that is covalently bonded to a more electronegative "donor" atom or group and another electronegative atom bearing a lone pair of electrons—the hydrogen bond acceptor—a hydrogen bond (or H-bond) forms (Ac). The second-row elements fluorine, oxygen, and nitrogen are the most common donor and acceptor atoms (F).

It may take place either intramolecularly or intermolecularly (between different molecules) (occurring among parts of the same molecule). The energy of a hydrogen bond can range from 1 to 40 kcal/mol and is influenced by the shape, surroundings, and nature of the particular donor and acceptor atoms.

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Answer:

b

Explanation:

false,

sodium has a vigorous reaction with water.

This can be observed by putting a piece of sodium in water,

it moves swiftly across the surface of water and reacts violently.

answer:

protein i think

explanation:

protein has a long chain of amino acids

Answer:

B. lipid

Explanation:

Got it right.

The number of moles of a substance is calculated from the given weight of the substance and its molecular mass by using the formula:

No. of moles = \(\frac{Mass of substance in grams}{Molecular mass of substance}\)

Molecular mass of Na₂SO₄.10H₂O is calculated to be

(23×2)+32+(16×4)+(10×18) = 46+32+64+180 = 322 g/mol

Thus, for 483g of Na₂SO₄.10H₂O, the number of moles would be

= \(\frac{322}{483}\) = 0.67 mol

For every 1 mole of Na₂SO₄.10H₂O, there are 2 moles of Na⁺ and 1 mole of SO₄²⁻.

Thus, 0.67 moles of Na₂SO₄.10H₂O will have 0.67×2= 1.34 moles of Na⁺ and 0.67 moles of SO₄²⁻.

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Answer:

The picture below is an example of a food chain.

Explanation:

The bug (can't tell which one by the picture) eats the grass, the frog eats the bug, the snake eats the frog, and the eagle eats the snake.

PbF2, BaF2 and CaF2

due to the fact that lead has a higher value of solubility product,

lead fluoride will precipitate first

Answer:

Explanation:

Accelerate:

A linear particle accelerator at the GSI Helmholtz Centre for Heavy Ion Research in Darmstadt, Germany, accelerates a beam of ionized titanium down a 400-foot tube at more than 67 million miles per hour—10 percent of the speed of light.

Collide:

For five months, the ionized titanium beam smashed into a target studded with berkelium atoms. Scientists predict that once every few billion impacts, a titanium atom, which has 22 protons, collided with the target at just the right speed and position to fuse with a berkelium atom, which has 97 protons, creating a new atom with 119 protons.

Separate

The newly formed superheavy atoms are more massive and move much more slowly—only 2 percent of the speed of light—than the ionized titanium. They also respond differently to a magnetic field. Using powerful magnets, scientists can steer element 119 away from the titanium and toward a detector.

Detect

Atoms of element 119 embed themselves in a silicon detector. The new element is radioactive, and while it is in the detector, it gives off alpha particles—two protons and two neutrons—in a predictable fashion. The detector registers these decays, which scientists use to prove the existence of the new element.

Answer:

-8 m/s^2

Explanation:

The formula for acceleration is:

a= v^2 - v^1/t

a= acceleration

v^2- final velocity which in this case would be 0 since the jet comes to a stop.

v^1= original velocity which is 80 m/s.

t=time or 10s

Substitute the letters for the numbers and you get this:

a= 0 - 80/10

0 - 80= -80

-80 divided by 10 is -8.

Hope this helps! :)

The concentration of the nickel ion is 0.20 M

Using the Nernst equation, we can write as follows;

Ecell= E0 cell-0.0592/n logQ

Ecell=0.03-0.0592/2 log[Cu^2+]/[Ni^2+]

0.03=0.03-0.0296 log 0.20M/[Ni^2+]

0=log 0.20M/[Ni^2+]

10^0=1=0.20M/[Ni^2+]

[Ni^2+]=0.20 M

So the concentration of [Ni^2+] is 0.20 M

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we have obtained expressions for z1 and z2 in terms of z0, c1, and c2. We can now use these expressions to compute z2 given an arbitrary z0, c1, and c2, z1 = (c1 + z0)/√2 + i(c1 - z0)/√2,  z2 = (c2 + z1)/√2 + i(c2 - z1)/√2.

Let's denote the complex numbers as follows:

c1: the center of the first rotation.

c2: the center of the second rotation.

z0: the initial complex number.

z1: the result of rotating z0 around c1 by π/4 counter-clockwise.

z2: the result of rotating z1 around c2 by π/4 counter-clockwise.

To perform these rotations, we use the following formulas:

To rotate a complex number z around a center c by an angle θ counter-clockwise, we can use the formula: z' = c + (z - c) * e²(iθ), where i is the imaginary unit and e²(iθ) is the complex exponential function.

Using these formulas, we can calculate z1 and z2 as follows:

z1 = c1 + (z0 - c1) * e²(iπ/4)

z2 = c2 + (z1 - c2) * e²(iπ/4)

To simplify these expressions, we can use the fact that e²(iπ/4) = 1/√2 + i/√2, which gives us:

z1 = (c1 + z0)/√2 + i(c1 - z0)/√2

z2 = (c2 + z1)/√2 + i(c2 - z1)/√2.

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A. The limiting reactant is NH₃

B. The mass of NO formed is 44.1 g

C. The mass of H₂O formed is 39.7 g

First, we shall determine the mass in 4 moles of O₂. Details below:

Mole = mass / molar mass

4 = Mass of O₂ / 32

Cross multiply

Mass of O₂ = 4 × 32

Mass of O₂ = 138 g

Finally, we shall determine the limiting reactant. Details below:

4NH₃ + 5O₂ -> 4NO + 6H₂O

From the balanced equation above,

68 g of NH₃ reacted with 160 g of O₂

Therefore,

25 g of NH₃ will react with = (25 × 160) / 68 = 58.8 g of O₂

From the above calculation, we can see that only 58.8 g of O₂ out of 138 g is needed to react with 25 g NH₃.

Thus, the limiting reactant is NH₃

The mass of NO formed can be obtained as illustrated below:

4NH₃ + 5O₂ -> 4NO + 6H₂O

From the balanced equation above,

68 g of NH₃ reacted to produce 120 g of NO

Therefore,

25 g of NH₃ will react to produce = (25 × 120) / 68 = 44.1 g of NO

Thus, the mass of NO formed is 44.1 g

The mass of H₂O formed can be obtained as illustrated below:

4NH₃ + 5O₂ -> 4NO + 6H₂O

From the balanced equation above,

68 g of NH₃ reacted to produce 108 g of H₂O

Therefore,

25 g of NH₃ will react to produce = (25 × 108) / 68 = 39.7 g of H₂O

Thus, the mass of H₂O formed is 39.7 g

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Answer:

Hi! Think of it like this:

You and your family are going to go on a vaction for the holidays, to south america or somewhere else. You´re near the equator so it will be warm. If you were to move there, you might pull out the swimsiutes because most of the time, its useally warm and sunny. They dont really get cold weather. They will have a nice and warm christmas.

Answer:

the answer is 383.0

hope it is helpful

i) The abbreviations provide information about specific amino acid residues in the enzyme's binding site. The abbreviations represent the amino acid residues and their corresponding positions in the protein sequence. For example, Trp 289 refers to tryptophan at position 289, Arg 310 refers to arginine at position 310, and so on.

ii) The main intermolecular interactions between the ligand and the enzyme can include hydrogen bonding, electrostatic interactions, van der Waals interactions, and potentially hydrophobic interactions.

iii) Since the diagram provided does not specify the positions of the atoms involved in hydrogen bonding with the water molecule, it is not possible to draw the full structure of the water molecule and identify the specific atoms involved in hydrogen bonding.

iv) Whether the enzyme is appropriate for molecular docking depends on several factors, including the availability and accuracy of the enzyme's three-dimensional structure, the understanding of the binding site, and the nature of the ligands being docked.

i) The abbreviations given, such as Trp 289, Arg 310, Arg 215, Asn 159, Trp 82, Gin 77, Ser 79, and Asp 267, provide information about specific amino acid residues in the enzyme's binding site. These abbreviations represent the amino acid residues and their corresponding positions in the protein sequence. This information helps identify the amino acids involved in the binding interaction with the small molecule inhibitor.

ii) The main intermolecular interactions between the ligand and the enzyme can include hydrogen bonding, where hydrogen atoms from the ligand interact with electronegative atoms in the enzyme; electrostatic interactions, which involve interactions between charged or polar groups; van der Waals interactions, which are attractive forces between nonpolar groups; and potentially hydrophobic interactions, where nonpolar groups exclude water molecules from the binding site.

iii) The provided diagram does not indicate the specific positions or atoms involved in hydrogen bonding with the water molecule. Therefore, it is not possible to accurately draw the full structure of the water molecule and identify the specific atoms participating in hydrogen bonding.

iv) The suitability of an enzyme for molecular docking depends on various factors. These include the availability and accuracy of the enzyme's three-dimensional structure, the understanding of the binding site, and the characteristics of the ligands being docked. Without further information about the enzyme and the specific requirements and goals of the molecular docking, it is not possible to determine if the enzyme is appropriate for molecular docking.

The provided information gives the amino acid residues involved in the enzyme's binding site, but the specific atoms involved in hydrogen bonding with the water molecule cannot be determined from the given diagram. The suitability of the enzyme for molecular docking requires additional information and analysis.

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Answer:

Both objects are in physical contact with each other

Explanation:

Conduction refers to the flow of heat from one object to another when the both objects are in contact with each other.

Hence, before heat can flow from one object to another, the two objects must be in contact with each other. This is a key requirement before conduction can take place.

The answer is 1.3 x 10^-5 for the Ka of propanoic acid.

To solve this problem, we can use the relationship between the pH, the concentration of the acid, and the acid dissociation constant (Ka).

First, we need to find the concentration of propanoic acid in the solution. We know that 0.100 moles of propanoic acid are dissolved in 1.00 L of solution, so the concentration is:

concentration = 0.100 mol / 1.00 L = 0.100 M

Next, we can use the Ka value to set up an expression for the acid dissociation reaction:

HC3H5O2 + H2O ⇌ C3H5O2- + H3O+

The Ka expression for this reaction is:

Ka = [C3H5O2-][H3O+] / [HC3H5O2]

We can assume that the concentration of C3H5O2- is equal to the concentration of H3O+, since they are produced in a 1:1 ratio. Let's call this concentration x. Then the concentration of HC3H5O2 will be (0.100 - x), since some of the acid has dissociated.

Substituting these values into the Ka expression and solving for x gives:

Ka = x^2 / (0.100 - x) = 1.3 x 10^-5
x = 1.47 x 10^-3 M

Now we can use the definition of pH to find the pH of the solution:

pH = -log[H3O+] = -log(x) = -log(1.47 x 10^-3) = 2.832

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Hence, the correct option is D) C5H7O3.

Nicotine is an addictive substance that is found in cigarettes.

The chemical formula for nicotine is C10H14O6.

To determine the empirical formula, one must find the smallest whole-number ratio of the atoms present. For that, we need to divide the subscripts by their greatest common divisor which in this case is 2.

According to the question, the chemical formula of nicotine is C10​H14​O6​.We need to determine its empirical formula.

To do this, we divide each subscript by their greatest common divisor which is 2 in this case.C10H14O6→C5H7O3Therefore, the empirical formula of Nicotine is C5H7O3.

Hence, the correct option is D) C5H7O3.

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Answer:

0.1 L

Explanation:

M₁ × V₁ = M₂ × V₂

10M × V₁ = 1M × 1L

V₁ = 0.1 L

I hope this helps :)

The molar dilution can be used to estimate the molarity or the volume. 0.1 L of 10 M solution is required to make 1 M of solution.

A dilution factor of the molar concentration is used to calculate the molar concentration or the volume needed to make the diluted solution from the stock.

Given,

M₁ = 10 M

V₁ = ?

M₂ = 1 M

V₂ = 1 L

The volume is calculated as:

M₁ V₁ = M₂ V₂

10 V = 1 × 1

V = 1 ÷ 10

= 0.1 L

Therefore, 0.1 L of the 10 M solution is needed.

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Explanation:

i have done

see the picture

and please mark me brainiest

The refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

To calculate the kilowatt-hours (kWh) of electric energy used by the refrigerator in 30 days, we need to multiply the power rating by the total running time.

Given:

Power rating of the refrigerator = 500 W

Running time per day = 12 hours

Number of days = 30

First, we need to convert the power rating from watts to kilowatts:

Power rating = 500 W / 1000 = 0.5 kW

Next, we calculate the total energy used in kilowatt-hours (kWh) over the 30-day period:

Energy used = Power rating × Running time × Number of days

Energy used = 0.5 kW × 12 hours/day × 30 days

Energy used = 180 kWh

Therefore, the refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

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Answer:

Electrons

Explanation:

Because the nucleas is In the middle and the Electrons surround it

The reaction that has been shown in the table above is a double replacement reaction, and each compound has the same set of ions. Option D

Another word that we can use for reaction is what we call a chemical change. We know that a chemical change is the kind of change that will lead to the formation of a new product. It is an irreversible process as we can not be able to get back the reactants again.

We should note that there are various types of reactions. In a single  replacement reaction, you would notice that there is only one substance that reacts and causes a change while in the double replacement reaction, the anions that are in the compounds that underwent the reaction would just exchange anion partners and we would have two ionic products.

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Answer:

Phosphorous

Explanation:

Although elements such as gold, silver, tin, copper, lead and mercury have been known since antiquity, the first scientific discovery of an element occurred in 1649 when Hennig Brand discovered phosphorous.

For a real gas to approach the properties of an ideal gas, the pressure should be low, the attraction between the molecules should be high, and temperature should be high.

Ideal gas conditions are:

         PV =nRT

The real gas conditions are:

       (P +αn²) (V - nb) = nRT

             V²

Thus, real gases behave ideally at high temperatures and low pressures.

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Answer:

This would give us Helium 4.

Explanation:

Lithium7 has 3 protons, 4 neutrons and 3 electrons.

Removing  1 Proton 1 electron and 2 neutrons would form an element with

2 protons 2 electrons and 2 neutrons.

This is Helium 4.