atoms of nonmetallic elements form covalent bonds, but they can also form ionic bonds. how is this possible? group of answer choices this happens when one of the bonded nonmetallic elements has a strong electronegativity. an ionic bond results when a nonmetallic elements loses an electron to a metallic element. it happens when one of the nonmetallic elements loses an electron to become a positive ion. an ionic bond results when a nonmetallic elements gains an electron from a metallic element.

Answer:

318.749g

Explanation:

The find the mass,

We use this formula

Number of mole = mass/ molar mass

Since number of mole = 3.25mol

Let the number of mass be x

The molar mass of H2SO4

H - 1.00784 * 2= 2.01568

S - 32.065

O - 15.999 * 4 = 63.996

Note there are 2 moles of H and 4 moles of O and 1 mole of S

Molar mass of H2SO4 = 2.01568 + 32.065 + 63.996

= 98.07668g/mol

Number of mole= 3.25mol

3.25 = x / 98.07668

x = 3.25 * 98.07668

x= 318.749g

Hence, the number of mass is 318.749g

Hope it will help you.

The united stated chemical industry produces more sulfuric acid, in terms of mass, than any other chemical. The mass of 3.25 moles of sulfuric acid is 318.749g.

The term molar mass is defined as the ratio between the mass and the amount of substance of any sample of said compound. A mole of any substance is 6.022 × 10²³ molecules.

The find the mass,

We use this formula given as follows:

Number of mole = mass / molar mass

So number of mole = 3.25mol

Let the number of mass be x

The molar mass of H2SO4

H - 1.00784  × 2 = 2.01568

S - 32.065

O - 15.999 × 4 = 63.996

Molar mass of H2SO4

= 2.01568 + 32.065 + 63.996

= 98.07668g/mol

Number of mole = 3.25mol

3.25 = x / 98.07668

x = 3.25 × 98.07668

x = 318.749g

Thus, The united stated chemical industry produces more sulfuric acid, in terms of mass, than any other chemical. The mass of 3.25 moles of sulfuric acid is 318.749g.

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The cube root of a number is the reverse of the cube of a number and it can be found by prime factorization method. The cube root of 8000 is 20.

Prime Factorization is the finding which prime numbers multiply together to make the original number. A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number.

Prime factorization of 8000 is 2 × 2 × 2 × 2 × 2 × 2 × 5 × 5 × 5

Simplifying the above expression: \(2^{6}\) * \(5^{3}\)

Simplifying further: \(20^{3}\)

Therefore, the cube root of 8000 by prime factorization is (2 × 2 × 2 × 2 × 2 × 2 × 5 × 5 × 5)1/3 = 20.

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The principle of faunal succession is a key concept in the study of prehistoric life and the age of sedimentary rocks. It is based on the idea that the fossilized remains of different species of animals and plants found in sedimentary rocks can be used to infer the relative age of the rocks and the conditions that existed when they were formed.

The principle of faunal succession states that over time, the species of animals and plants that lived in a particular area changed and evolved. As a result, the fossilized remains of different species found in sedimentary rocks can be used to infer the relative age of the rocks.

This principle is based on the idea that the fossil record is a record of the evolution of life on Earth. In addition, the principle of faunal succession also provides insight into the ancient environment and climate. For example, the presence of certain types of fossils, such as coral reefs or tropical plants, may indicate that the area was once a warm, shallow sea.

In all, the principle of faunal succession is a powerful tool that connects prehistoric life to the age of sedimentary rocks. By studying the fossilized remains of different species found in sedimentary rocks, scientists can infer the relative age of the rocks and the conditions that existed when they were formed.

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Empirical formula tells us the relative ratios of different atoms in a compound.

The chemical formula for a compound obtained by composition analysis is always the empirical formula.

How to calculate Empirical formula:

Linalyl acetate (bergamot oil):

              Carbon               Hydrogen                  Oxygen

                73.41 %                   10.29 %                  16.30 %

             73.41 / 12               10.29 / 1                   16.30 / 16

               6.11                          10.29                        1.01

            6.11 / 1.01                10.29 / 1.01                1.01 / 1.01

                 6                            10                                1

          Empirical formula : C₆H₁₀O

Thus we can conclude that empirical formula of linalyl acetate is  C₆H₁₀O

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The empirical formula for Linalyl acetate expresses the relative proportions of different atoms in a compound.

Linalyl acetate is a phytochemical found in a variety of flowers and spice plants. It is an important component of bergamot and lavender essential oils. It is the linalool acetate ester, and the two are frequently found together.

Hence, the empirical formula describes the relative proportions of different atoms in a compound. The chemical formula for a compound obtained through composition analysis is always the empirical formula.

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The number of moles of NaF that will be produced from 3moles of Na is 3 moles.

Stoichiometry is the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).

According to this question, sodium reacts with fluorine as follows:

2Na+ F₂ → 2NaF

Based on the above equation, 2 moles of Na will produce 2 moles of NaF

This means that 3 moles of Na will produce 3 moles of NaF.

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Option  D. Zn(s) → Zn2+(aq) + 2e and Ni2+(aq) + 2e → Ni(s)

The emf of a half-cell, with respect to the standard hydrogen electrode, is called the reduction potential. The emf for the Mg-Zn cell described would be: E=Eo(red) (Zn) - Eo(red) (Mg) = -0.76 - (-2.38) = 1.62V if the solutions are 1.0 M.

A half-cell reaction is either an oxidation reaction in which electrons are lost or a reduction reaction in which electrons are gained. The reactions occur in an electrochemical cell in which the electrons are lost at the anode through oxidation and consumed at the cathode where the reduction occurs.

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Rutherford's gold foil experiment proved that an atom is mostly empty space with a tiny, dense, positively-charged nucleus.

Rutherford's gold foil experiment is defined as the positive-charged alpha particles struck a piece of gold foil. Most alpha particles passed through unharmed it has been observed that electrons are revolving around the nucleus.

Rutherford reasoned that the mass of the atom was distributed across the atom if Thomson's model was accurate.

Thus, Rutherford's gold foil experiment proved that an atom is mostly empty space with a tiny, dense, positively-charged nucleus.

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Answer:

Increasing your concentration of negative ions is a very important way to improve your health for a variety of reasons. They work to increase serotonin levels in your body, which improves mood and balances your mental health, helping combat depression and anxiety.

Explanation:

The two uses of dry ice include the following:

This is defined as a solid form of carbon dioxide and doesn't have a liquid state under normal atmospheric pressure. This is therefore the reason why it undergoes sublimation which involves the direct conversion of the solid phase to the gas phase.

Dry ice is used as a cooling agent in the preservation of substances via refrigeration etc and is also used in agriculture to speed up the growth of plants.

This is because plants need carbon dioxide for their photosynthetic activities and the aforementioned are therefore the appropriate uses of dry ice.

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Answer: Gamma Rays

Explanation:

The waves with the highest frequency are Gamma Rays. These electromagnetic waves travel at a very high speed. Best of Luck to you!

Answer: Answer:

Explanation:

Apparent magnitude does not take into account the fact that not all stars are the same distance from Earth.

Apparent magnitude is only on a comparative scale that determines how bright a star looks from a theoretical distance of 32 light-years from Earth. Therefore, the correct option is option D.

Any large, gaseous celestial body that is capable of producing its own light and illuminates through radiation. Only a very small portion of the tens of milliards of milliards of stars that make up the observable cosmos are readily visible to the eye.

When measuring the brightness of a star, what is a limitation of using apparent magnitude rather than absolute brightness. Apparent magnitude is only on a comparative scale that determines how bright a star looks from a theoretical distance of 32 light-years from Earth.

Therefore, the correct option is option D.

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Answer:

they have shape.

they have volume.

they occupy space.

Answer:69.8

Explanation:

Answer:

Nitrogen is an inert gas — meaning it doesn't chemically react with other gases — and it isn't toxic. But breathing pure nitrogen is deadly. That's because the gas displaces oxygen in the lungs. Unconsciousness can occur within one or two breaths, according to the U.S. Chemical Safety and Hazard Investigation Board.

Answer:

because it is an insert gas and it is very dangerous for ear and our nose

The nuclear product of radioactive decay is called the daughter nuclide.

True

Radioactivity is a phenomenon in which particles such as alpha, beta and gamma rays are emitted from unstable atomic nuclei. This is due to the fact that the nucleus is unstable and requires a rearrangement of its protons and neutrons. Radioactive isotopes can be found in nature, or they can be artificially created. Radioactivity has many useful applications, such as medical imaging, cancer treatments, smoke detectors, and nuclear energy. It also has some potential dangers, such as radiation exposure and the risk of nuclear disasters.

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The greatest amount of a solute that may dissolve in a specific amount of solvent is known as a substance's solubility; this quantity depends on the chemical makeup of both the solute and the solvent as well as on

Temperature and pressure are the two direct variables that impact solubility. Pressure solely influences the solubility of gases, but temperature affects the solubility of both solids and gases.

The four main elements that influence a gas' solubility in a liquid are listed below. Size, chemical reactivity, pressure, and temperature between the liquid and gas. Typically, as the pressure rises, the gas becomes more soluble.

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A substance's solubility is the maximum amount of that substance that may dissolved in a given amount of solvent; this amount relies on the chemical composition of both the solvent and solute as well as on

Temperature and pressure are the two direct variables that impact solubility. Temperature has an impact here on soluble including both solids and gases, but pressure only affects the gas's solubility.

The below is a list of the four primary factors that affect a gas' soluble in a liquid. Temperature, pressure, size, and chemical reactivity here between liquid and gas Usually, the gas gets more soluble as the pressure increases.

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Answer:

all

Explanation:

because they all are someone related to climate change

Answer:

your awnser would be expanding glaciers.

Explanation:

have a nice day hope this helps

Answer:nope nope

Explanation:just no

The vapor pressure at 298K of a 20% solution of KNO3 is approximately 2.56 kPa after using Raoult's law.

To determine the vapor pressure of a 20% solution of KNO3 at 298K, we need to consider the concept of colligative properties, specifically the lowering of vapor pressure caused by the presence of a solute.

The vapor pressure of a solution is lower than that of the pure solvent due to the solute particles occupying space at the surface, reducing the number of solvent molecules able to escape into the vapor phase. This reduction in vapor pressure is described by Raoult's law.

Raoult's law states that the vapor pressure of a solvent in a solution is equal to the mole fraction of the solvent multiplied by the vapor pressure of the pure solvent. In this case, the solvent is water.

Given that the vapor pressure of water at 298K is 3.2 kPa, we can calculate the vapor pressure of the 20% KNO3 solution as follows:

1. Determine the mole fraction of water:

In a 20% solution by mass, the remaining 80% is water. So, the mole fraction of water (Xw) is 0.8.

2. Apply Raoult's law:

P = Xw * Pw

P = 0.8 * 3.2 kPa

P ≈ 2.56 kPa

The presence of KNO3 in the solution reduces the vapor pressure compared to pure water, demonstrating the colligative property of lowering the vapor pressure due to the dissolved solute.

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I think the answer is A. I know it's Planet X.

Answer:

A. Exactly 1.55 ounces

Answer:

It's a metaphor. It's comparing Jordan and their emotions to a tornado

Answer:

1. An incline plane is a flat plan put at a positive angle with the ground (assuming the ground is horizontal)

2. Work equals force times distance. And since the hypotenuse of a triangle (the ramp) is longer than the opposite side (equivalent to lifting an object vertically), the increased distance decreases the force needed to do a certain amount of work.

3. We usually use incline planes to elevate large objects.  Since it takes less force to move certain things up inclines rather than picking them up, it is much simpler to move an object up an incline.

4. You could decrease the force by making the plane's angle with the ground smaller.

5. I don't know; I wasn't in your class :)

6. Ramps, wheelchair entrances, inclined rooves etc.

7. No. A plane has to be relatively flat; therefore stairs are neither a plane, nor an inclined plane.

The pH of the solution after the addition of 15.0 ml of KOH is 1.28.

In the given problem, we have been provided with the volume of HBr (hydrogen bromide) solution and its concentration.

We have been also provided with the concentration and volume of KOH (potassium hydroxide) solution.

We need to calculate the pH of the solution after the addition of 15.0 ml of KOH.

Let’s begin the calculation process-

1. Write down the balanced chemical equation of HBr and KOH-

HBr + KOH → KBr + H2O

2. To Calculate the number of moles of HBr-

We know that, Number of moles = Concentration x VolumeNumber of moles of HBr = 0.15 x 50/1000= 0.0075 moles of HBr

3. To Calculate the number of moles of KOH-

Number of moles of KOH = Concentration x VolumeNumber of moles of KOH = 0.25 x 15/1000= 0.00375 moles of KOH

4. To Calculate the number of moles of HBr left after the reaction-

Number of moles of HBr left = Number of moles of HBr – Number of moles of KOHNumber of moles of HBr left = 0.0075 - 0.00375= 0.00375 moles of HBr

5. To Calculate the concentration of HBr-

Concentration of HBr = Number of moles / VolumeConcentration of HBr = 0.00375 / 50/1000= 0.075 M

6. To Calculate the concentration of OH-

Number of moles of KOH = Concentration x Volume

Number of moles of KOH = 0.25 x 15/1000= 0.00375 moles of KOH

Concentration of KOH = Number of moles / Volume

Concentration of KOH = 0.00375 / 65/1000= 0.0577 M

Concentration of OH- = Concentration of KOH= 0.0577 M

7. To Calculate the concentration of H+

Using the formula of pH = -log[H+], we can get

[H+] = 10-pHLet pH = x[H+] = 10-x

From the balanced chemical equation, we know that 1 mole of HBr will give 1 mole of H+ and 1 mole of KOH will give 1 mole of OH-.

As the moles of KOH is less than the moles of HBr, KOH is the limiting reagent.

Now, using the formula of neutralization reaction, we can write-Volume of HBr x Concentration of HBr = Volume of KOH x Concentration of KOH50/1000 x 0.075 = 15/1000 x 0.0577Volume of HBr = 0.06 L

Now, H+ ion concentration can be calculated as-H+ ion concentration = KOH concentration – HBr concentration= 0.0577 – (0.075 x 0.015 / 0.06)= 0.0519 M

8. To Calculate pH of the solution-

We know that, pH = -log[H+]= -log(0.0519)= 1.28

Hence, the pH of the solution after the addition of 15.0 ml of KOH is 1.28.

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Answer:

Metallic Bonding

Explanation:

Metallic Bonding

In metallic bonds, the valence electrons from the s and p orbitals of the interacting metal atoms delocalize. That is to say, instead of orbiting their respective metal atoms, they form a “sea” of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions.

23.01% is the mass percent water in MgSO\(_4\)• 2 H\(_2\)O. The term "mass percentage" describes the proportion.

One approach to indicate the concentration of such a dissolved component in a solution is by mass percentage. The term "mass percentage" describes the proportion of a compound's mass to the overall mass of a solution.

Calculate the mass percent concentration, for instance, of a solution made by combining 6 g of sodium bicarbonate (NaHCO3) and 10 g of sodium chloride (NaCl) in 120 g of water.

mass percent = (mass of water/mass of MgSO\(_4\)• 2 H\(_2\)O)×100

mass percent =( 36/156.39)×100

                     =23.01%

Therefore, 23.01% is the mass percent water in MgSO\(_4\)• 2 H\(_2\)O.

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(a)

pH = 4.77

; (b)

[

H

3

O

+

]

=

1.00

×

10

-4

l

mol/dm

3

; (c)

[

A

-

]

=

0.16 mol⋅dm

-3

Explanation:

(a) pH of aspirin solution

Let's write the chemical equation as

m

m

m

m

m

m

m

m

l

HA

m

+

m

H

2

O

⇌

H

3

O

+

m

+

m

l

A

-

I/mol⋅dm

-3

:

m

m

0.05

m

m

m

m

m

m

m

m

l

0

m

m

m

m

m

l

l

0

C/mol⋅dm

-3

:

m

m

l

-

x

m

m

m

m

m

m

m

m

+

x

m

l

m

m

m

l

+

x

E/mol⋅dm

-3

:

m

0.05 -

l

x

m

m

m

m

m

m

m

l

x

m

m

x

m

m

m

x

K

a

=

[

H

3

O

+

]

[

A

-

]

[

HA

]

=

x

2

0.05 -

l

x

=

3.27

×

10

-4

Check for negligibility

0.05

3.27

×

10

-4

=

153

<

400

∴

x

is not less than 5 % of the initial concentration of

[

HA

]

.

We cannot ignore it in comparison with 0.05, so we must solve a quadratic.

Then

x

2

0.05

−

x

=

3.27

×

10

-4

x

2

=

3.27

×

10

-4

(

0.05

−

x

)

=

1.635

×

10

-5

−

3.27

×

10

-4

x

x

2

+

3.27

×

10

-4

x

−

1.635

×

10

-5

=

0

x

=

1.68

×

10

-5

[

H

3

O

+

]

=

x

l

mol/L

=

1.68

×

10

-5

l

mol/L

pH

=

-log

[

H

3

O

+

]

=

-log

(

1.68

×

10

-5

)

=

4.77

(b)

[

H

3

O

+

]

at pH 4

[

H

3

O

+

]

=

10

-pH

l

mol/L

=

1.00

×

10

-4

l

mol/L

(c) Concentration of

A

-

in the buffer

We can now use the Henderson-Hasselbalch equation to calculate the

[

A

-

]

.

pH

=

p

K

a

+

log

(

[

A

-

]

[

HA

]

)

4.00

=

−

log

(

3.27

×

10

-4

)

+

log

(

[

A

-

]

0.05

)

=

3.49

+

log

(

[

A

-

]

0.05

)

log

(

[

A

-

]

0.05

)

=

4.00 - 3.49

=

0.51

[

A

-

]

0.05

=

10

0.51

=

3.24

[

A

-

]

=

0.05

×

3.24

=

0.16

The concentration of

A

-

in the buffer is 0.16 mol/L.

hope this helps :)

The equilibrium constant of this reaction is 1.80×10-5

Given data,

pH of solution = 2.873

Number of moles of acetic acid (m) = 0.05 moles

Volume of water (V) =  500 mL = 0.5L

So, concentration (C) = m/V in lit = 0.05/0.5 = 0.1 M

Equilibrium constant ( K ) = \([CH_{3} COO-]\)×\([H+_{} ]\)/\([CH_{3} COOH]\)

Since, acetic acid is weak acid,

So, Equilibrium constant ( K ) = \([H+]^{2}\)/\([CH_{3} COOH]\)   ....(i)

As the pH = 2.873, the \([H+_{} ]\) is antilog of -2.873 or 1.34×10-3 M.

Putting the value of concentration of \(H+_{}\) and \(acetic_{} acid\) in equation (i).

Equilibrium constant ( K ) = 1.80×10-5

The acid which is partially dissociates into ions on dissolving in aqueous solution is called weak acid.

Example: \(acetic_{} acid\).

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