Which combination of elements would most likely form an ionic compound?

A sodium and fluorine

B. carbon and chlorine

C. hydrogen and oxygen

D. silicon and sulfur

The empiric molecular formula of this compound when an unknown hydrocarbon is subjected to elemental analysis  is C4H9

C = 100.00 - 16.76 = 83.24% if H = 16.76%.

each percentage value by the corresponding atomic mass

H = 16.76/1 = 16.76

C = 83.24/12 = 6.94

Divide by a lesser number.

Remove fraction and multiply by 4 H = 9.64

C = 4 H = 16.76/6.94

= 2.41

C = 6.94/6.94 = 1

Empirical equation: C4H9

Octane, or (C4H9)2 (the hydrocarbon), could be the substance.

By calculating the number of moles of each element from its mass, empirical formulas are generated using empirically measured element masses. Obtaining subscripts for a possible empirical formula by dividing the molar amount of each element by its smallest molar amount.

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The combination of beads should the student use for  the model :2 green, 3 blue and 12 yellow

In the chemical formula of a compound there are numbers:

1. The number indicates the number of atoms written after the element symbol

2. The number after the parentheses represents the number multiplied by the number of atoms in parentheses.

3. The number before the chemical formula shows the number of molecules behind it, which is usually used in equations

To calculate the beads needed to make a model, we must count the number of atoms of the Al₂(SO₄)₃ molecule

In the Al₂ (SO₄) ₃ molecule there are 3 atoms : Al, S, and O

So the combination of beads

2 green(for Al), 3 blue(for S) and 12 yellow(for O)

Answer:

2 blue, 3 yellow, and 12 green

Explanation:

Answer:

This could be guanidinopropionate.  A drawing of the structure is attached.

Explanation:

There are other possible structures with this formula.  The one shown in the attached diagram is one possibility.  It is named, unfortunately, guanidinopropionate.  

Answer:

this is what i know

Explanation:

Molecules or ions of a solute spread throughout the water molecules

The methyl group is toluene is not on meta position. The methyl group is electron releasing group.

In case of toluene, the methyl group connected to the ring, will increase the electron density at ortho and para positions via way of means of resonance with out converting some thing on the meta position. Thus the attacking reagent at once assaults on the electron wealthy site , accordingly the methyl institution is ortho directing. you may effortlessly apprehend the motion of electrons via way of means of following the route of arrows in structures. There isn't any shape wherein the electrons may be visible on meta position.

The resonating structures of toluene is attached below.

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Answer:

false

Explanation:

no, waste products in lab can't be poured down the sink because sometime cimicals can be harmfully and can damage the sink

Answer:

False

Explanation:

Your teacher has a designated area for getting rid of chemicals especially potentially hazardous chemicals

Answer:

b

Explanation:

This means that it takes more energy or heat to increase water's temperature than it does for most other substances. The specific heat of water is greater than that of dry soil, therefore water both absorbs and releases heat more slowly than land.

Explanation:

pH= –log¹⁰[H+]

0.50= –log¹⁰[H+]

log¹⁰[H+]=0.50

take the antilog of 0.50

[H+]= 3.16moldm-³

Answer:

0.086

Explanation:

got it on acellus

The mass of the dry solute recovered from the given data is 0.086 g.  Option C

To determine the mass of the dry solute recovered, we need to subtract the mass of the boat from the mass of the boat with the dry solute.

Given the data provided:

Boat Mass: 0.730 g

Boat + Solution: 0.929 g

Boat + Dry: 0.816 g

To find the mass of the dry solute, we subtract the boat mass from the boat + dry mass:

Mass of Dry Solute = (Boat + Dry) - (Boat Mass)

Mass of Dry Solute = 0.816 g - 0.730 g

Mass of Dry Solute = 0.086 g

Therefore, the correct answer is c) 0.086 g.

The mass of the dry solute recovered from the given data is 0.086 g. It is important to note that the mass of the dry solute is obtained by subtracting the mass of the boat from the mass of the boat with the dry solute, as the boat mass represents the weight of the empty boat or container used in the experiment.

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Answer:

What is a noble gas electron configuration?

A noble gas electron configuration is a configuration that completes the Octet Rule of achieving 8 valence electrons.

Atoms always behave in ways to achieve stability and as you probably know, Noble Gases are the most stable. Their configuration, with a full valence electron shell (8 electrons, when you add both the S & P sublevels together, this is why it’s called the Octet), is therefore desirable. This means metals on the far left of the table will lose electrons to achieve this noble gas configuration and nonmetals on the right will gain electrons (generally speaking).

For example; take Argon. Its electron configuration is 1s^2 2s^2 2p^6 3s^2 3p^6, meaning it has 8 valence electrons. Then, take Chlorine. It has the electron configuration 1s^2 2s^2 2p^6 3s^2 3p^5, meaning it has 7 valence electrons so it’s a very unhappy camper. It typically gains an electron to achieve the 8 valence electrons Argon has (even using the same configuration of 1s^2 2s^2 2p^6 3s^2 3p^6) because it’s Mega jealous of Argon’ s stability. Side note: this is why chlorine typically has a -1 charge!

In summary, an atom achieving a “Noble Gas configuration” is the same as saying an atom fulfilling the Octet Rule. Both mean that there are 8 valence electrons (electrons in shell furthest from nucleus). This is a stable form many atoms seek to achieve (of course, what’s a good rule in chemistry if there aren’t exceptions!).

In terms of strength, NaOH (sodium hydroxide) is considered the strongest base.  So, the correct answer is Option A.

This is because it is a strong electrolyte and dissociates completely in water to produce hydroxide ions (OH-). This results in a high concentration of hydroxide ions and a high pH value, making it a strong alkaline substance.

Mg(OH)2 (magnesium hydroxide) is also considered a strong base, but not as strong as NaOH. It dissociates partially in water, producing hydroxide ions, but not as many as NaOH.

NH4OH (ammonium hydroxide) is a weak base, as it only partially dissociates in water, producing hydroxide ions. The concentration of hydroxide ions is not as high as NaOH, making it less alkaline and weaker in terms of strength.

So, the correct answer is Option A.

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When an acid is added to an alkaline solution such as ammonia, the pH of the solution decreases. This is because hydrogen ions, which are acidic, are added to the solution. The pH of the solution is calculated using the formula pH = -log[H+].Given information:Initial volume of ammonia solution = 20.00 mLInitial concentration of ammonia solution = 0.1000 MVolume of HCl added = 6.07 mL Concentration of HCl solution = 0.2000 M1.

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Answer:

C. Neither accurate nor precise

Explanation:

Thus the results are neither accurate nor precise.

l = 0 → s = 2 electrons, l = 1 → p = 6 electrons, l = 2 → d = 10 electrons, l= 3 → f = 14 electrons.

The smallest elemental component of an atom, the electron has a negative charge. The smallest elemental component of an atom, the electron has a negative charge. In a negative ion, there are an adequate amounts of both electrons and protons.

According to the subatomic particles, the orbit region of space has a higher likelihood of harboring an electron. It is impossible to simultaneously detect the electron's location and velocity (uncertainty principle). Therefore, the theory establishes five electron density to represent one electron, making it simple to recognize it:

→n is the principal quantum number and identify the shell where the electron is.It ranges from 1 to 7, and the consonants K, L, m actually, N, O, P, etc Q stand in for it;

→l is the azimuthal quantum number and identify the subshell (or sublevel) where the electron is. The consonants s, p, d, or f stand in for it, which ranges from 0 to 3;

→ml is the magnetic quantum number, and it represents the orbital. It varies from -l to +l, passing by 0. There can be at least two electrons in each orbital;

→ms is the spin number and represents the spin of the electrons. The range is +1/2 to -1/2.

The sublevel s (l = 0) only has one orbital, enabling it to have at least two electrons; the subarea p (l = 1) has three orbitals, so it can and has at least six electrons; the subarea d (l = 2) has five orbitals, so it can would have had at least ten electrons; and the basement level f (l = 3) has seven orbitals, enabling it to have at least fourteen electrons.

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Answer:

There is an increase in nuclear charge.

is the lightest essential particle that makes up an atom and has the least possible charge in terms of negative electricity.

is a subatomic particle with a positive electrical charge that, together with neutrons, forms the nucleus of atoms.

is a massive particle with no electrical charge. It is a baryon made up of two down quarks and one up quark.

Molarity of the solution is 5.8M

        moles of solute (n) = 1.45      

        Volume of solution (V) = 250 ml

Molarity of a solution is defined as the number of moles of the solute dissolved per litre of the solution. It is represented as M . Thus a solution, which contains one gram mole of the the solution dissolved per litre of the solution is regarded as .

M = n of solute  / Vol (L)

    =  \(\frac{1.45 * 1000}{100 * 250}\) = 5.8 M

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Answer:

Explanation:Given;

applied force, F = 8000 N

time of force application, t = 15 s

Work done is given as the product of force and displacement. Since the car is unable to move, then the displacement is zero and the work done is zero.

Work done = Force x displacement

Work done = 8000 N x 0

Work done = 0

Therefore, the work done is zero.

The reaction given below can be represented as follows:`

H2PO4– + H2O ⇋ H3O+ + HPO42–

`Base–conjugate acid pair:` H2PO4–` and `HPO42–`

A Brønsted-Lowry acid-base reaction involves the transfer of a proton from one substance to another.

In this reaction, H2PO4– acts as an acid, donating a proton to water.

This produces the conjugate base of H2PO4–, HPO42–, and the conjugate acid of water, H3O+.

A base-conjugate acid pair is defined as two substances that differ only in the presence or absence of a single proton.

In this reaction, the base H2PO4– loses a proton to form its conjugate acid, HPO42–.

Therefore, `H2PO4–` and `HPO42–` is the base–conjugate acid pair.

The term "base-conjugate acid pair" refers to two species with the following characteristics:

They are both conjugates.

They differ by one hydrogen ion.

The dissociation of an acid (HA) results in the formation of a conjugate base (A−) and a hydrogen ion (H+). HA is called an acid, while A− is called a conjugate base.

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The hydrogen ion concentration in a blood sample with a pH of 7.30, as measured by a pH meter, is approximately \(5.01 x 10^(-8) M\). This value indicates a slightly acidic blood sample, which may be outside the typical range for healthy individuals.

The pH is a measure of the hydrogen ion concentration (H+) in a solution. The pH scale ranges from 0 to 14, with a pH of 7 being neutral. The formula to calculate hydrogen ion concentration from pH is:
\(H+ = 10^(-pH)\)

In the context of a blood sample, a pH meter is used to measure the pH of the blood. The pH of healthy human blood typically falls within the range of 7.35 to 7.45, with a pH of 7.30 indicating slightly acidic blood.

Using the given pH value of 7.30, we can calculate the hydrogen ion concentration as follows: \(H+ = 10^(-7.30)\), \(H+ ≈ 5.01 x 10^(-8) M (molar)\)

This means that the blood sample has a hydrogen ion concentration of 4.47 x 10^-8 mol/L. It's worth noting that even small changes in pH can have significant effects on biological systems, including enzyme activity and protein structure. The normal pH range of human blood is tightly regulated between 7.35 and 7.45,

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The statements which is true about the reactants from the given simulation above is: It involves the breaking of chemical bonds.

The correct answer choice is option c

For a chemical reaction to occur, the bond between the reacting substances breaks either by covalent or electrovalent bonding in order to form new substance.

So therefore, reactants usually break chemical bonds duringchemical reaction.

Complete question:

A chemical reaction causes the chemical compositions of substances to change. Reactants are substances that enter into a reaction, and products are substances produced by the reaction

Which of the following are the reactants for this simulation? Select all that apply

a. A chemical reaction results to formation of new bonds

b. A chemical reaction involves the formation of new substance.

c. It involves the breaking of chemical bonds

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Answer:

lower th

Explanation:

Pb{Cl}_{2})$ is an inorganic

answer:

lower the temperature so the lead chloride settles out of solution

compound which is a white solid under ambient conditions. It is one of the most important lead-based

reagents. It is poorly soluble in water. And it is insoluble in cold water. Sodium chloride is ssolble at all temperature

so lower the temperature

The relationship between absorbance and energy is the minimum energy for photoactivation (Ea) is to the wavelengths of the peak absorbance.

The Absorbance will be related to the amount of the substance in the solution, therefore it can be used to the quantitatively determination of the amount of the substance that will be present. The shorter the wavelength, the greater the energy.

The Absorbance can be defined as the logarithm of the ratio of the incident to the transmitted radiant power through the sample. Energy of the absorption can be defined, the surface below the load displacement curve. The  minimum energy for photoactivation to wavelengths of the peak absorbance.

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Emerging scientific ideas are new theories or ideas that are gaining attention in the scientific community, but have not yet been fully accepted or confirmed.

Emerging ideas refer to the new and innovative ideas or theories that have yet to gain full scientific acceptance. While a scientific consensus is a view or theory that has been universally accepted and confirmed by multiple experiments or research, an emerging scientific idea is a new and unproven theory or idea that is gaining attention in the scientific community. These emerging ideas may also be referred to as scientific hypotheses. In contrast to scientific consensus, emerging scientific ideas have not yet been subjected to rigorous testing and confirmation.

They are generally proposed to explain new observations or experimental results, which have not yet been fully understood or explained by established scientific theories. Emerging scientific ideas can have the potential to challenge the current scientific consensus. If an emerging scientific idea is found to be valid, it can ultimately lead to the establishment of a new scientific consensus. For example, the emerging scientific idea of the Higgs boson particle led to the discovery of a new field in particle physics, which is now an established scientific consensus.

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Answer:

A. They insulate the bears and allow them to blend in with their environment

Answer:

This statement is correct

Explanation:

Water is made up of 2 hydrogen atoms and 1 oxygen atom while salt is made up of 1 atom of sodium and 1 atom of chloride

:)

Answer:

The molarity is 0.4 \(\frac{moles}{liter}\)

Explanation:

The Molarity (M) or Molar Concentration is a concentration unit that indicates the number of moles of the solute per liter of solution. In other words, molarity is defined as the number of moles of solute that are dissolved in a given volume.

The Molarity of a solution is determined by the expression:

\(Molarity (M)=\frac{number of moles of solute}{volume}\)

Molarity is expressed in units (\(\frac{moles}{liter}\)).

In this case:

Replacing:

\(Molarity (M)=\frac{0.2 moles}{0.5 L}\)

Molarity= 0.4 \(\frac{moles}{liter}\)

The molarity is 0.4 \(\frac{moles}{liter}\)

"To insure proper operation of an oxygen cylinder regulator, make sure no oil residue is present" is true because oil residue can compromise the functioning of an oxygen cylinder regulator.

Explanation: It is true that to ensure proper operation of an oxygen cylinder regulator, it is important to make sure that no oil residue is present. Oxygen cylinders contain highly concentrated oxygen that can react violently with oil or grease, leading to combustion or explosions. Oil residue can contaminate the regulator and pose a significant safety risk.

Therefore, it is crucial to keep oxygen cylinders and their regulators free from any oil or grease to maintain safe and proper functioning.

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The weight of fat is 24.27 pounds of a 74 kg athletes.

15% by mass means 15 g of fat is present in 100g of mass.

Convert kg into grams

1 kg = 1000 gram

74 kg = 74000 g

Now,

Mass of body = \(\frac{74000 g \times 15\ g}{100}\)

                      = 740 × 15

                      = 11100 g

Convert g into kg

11100 g = 11.1 g

Convert kg into pounds

1 kg = 2.205 pounds

11.1 kg = 11.1 × 2.205

          = 24.47 pounds

Thus from above conclusion we can say that the weight of fat is 24.27 pounds of a 74 kg athletes.

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