Choices: True, False. Select all that are True.
ON2 means that each nitrogen atom is separate from each other (not bonded).
N2 means that each nitrogen atom is bonded to another and they act as a unit.
2N is considered a molecule whereas N2 is not.
2N means that each nitrogen atom is separate from the other (not bonded).
2N means that each nitrogen atom is bonded to another and they act as a unit.

Answer:

Question is incomplete.

Answer:b

Explanation:

Answer:

See attached picture.

Explanation:

Hello,

In this case, the E-Z nomenclature for alkenes is also related with the trans-cis ones, being the Z (zusammen) same as cis and E (entgegen) same as trans, therefore, for the structure of the (E)-2-butenal which has the double bond at the second carbon is shown on the attached picture considering it is an aldehyde with the carbonyl group due to the -al- suffix.

Regards.

Answer:

Explanation:

There are 2 NH4 in the equation therefore just multiply the molarity of the total solution by 2. Aaaaaaaaaaaaaaaaaaaaaaaaaaaand listen to "She Blinded Me With Science" by Thomas Dolby! ;)

Answer:

the nervous system

Explanation:

Answer:

central nervous system

Explanation:The brain and the spinal cord are the central nervous system. The nerves that go through the whole body make up the peripheral nervous system.

Answer:

Molarity indicates the number of moles of solute per liter of solution and is one of the most common units used to measure the concentration of a solution.

Explanation:

Answer:

concentration

Explanation:

Answer:It is a mixture

Explanation:

If it is pure sugar it’s neither but if it has water it is a homogeneous mixture

Mixture are produced by the physical combination of two or more components.  A compound is formed by the chemical bonding of atoms. Sugar water is an example of homogeneous mixture.

Compounds are formed by the combination of atoms or molecules through chemical bonding. There are various kinds or compounds based on the type bonding such as ionic, covalent, metallic etc.

Mixtures are formed by the physical combination of two or more components. However, mixture can be chemically bonded particles. There are two types of mixtures. Homogeneous mixtures are formed by uniform distribution of particles.

Homogenous mixtures appear to be one compound since it have only one phase. Heterogenous mixtures are exhibiting separated phases and the particles are randomly distributed here.

Sugar water is formed by dissolving sugar on water where, the sugar is completely dissolved in water and thus is an example  of homogenous mixture.

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law stating that the pressure of a given mass of an ideal gas is inversely proportional to its volume at a constant temperature

Answer:

Boyle's law is a pressure versus volume relationship. The law was discovered by Robert Boyle in the 17th century. It states the pressure of a fixed amount of a gas is inversely proportional to its volume at a constant temperature.

Explanation:

pressure versus volume relationship

Answer:

C

Explanation:

They are stabil and full of valence electron.

Considering the definition and properties of noble gases, a full valence electron configuration causes the noble gases to be unreactive. (option C)

Noble gases or inert gases are known as the set of chemical elements that constitute group 18 (VIIIA) of the Periodic Table of the elements.

Noble gases have a very low chemical reactivity. This is because they have a complete valence shell that gives them a low tendency to capture or release electrons. For this reason they have also received the name of inert gases or rare gases.

In other words, the electronic configuration of the noble gases is that their outermost shell or valence shell is always complete, without the need to accept or give up electrons. Then they are in a state of maximum stability.

Because all chemical transformations involve valence electrons, noble gases do not participate in chemical reactions to form chemical compounds, since they are very stable on their own.

In summary, a full valence electron configuration causes the noble gases to be unreactive. (option C)

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Answer:

They are two different objects and they measure things differntly

Explanation:

Answer:

[tex]\rho = 2.7g/mL[/tex]

Explanation:

Hello,

In this case, given that the density for a material es defined via its mass and volume:

[tex]\rho =\frac{m}{V}[/tex]

We first need to compute the volume of aluminum in this case, since it comes from the volume of cylinder and the volume of the cylinder with the aluminum:

[tex]V=15.46 mL-10.00mL\\\\V=5.46mL[/tex]

In such a way, the density turns out:

[tex]\rho=\frac{14.74g}{5.46mL}\\ \\\rho = 2.7g/mL[/tex]

Best regards.

Answer:

C. Mantle

Explanation:

mantle is the inside of the Earth

Answer:

C... i think

Explanation:

B

i hope this helped!

None of the above are correct.

Albert Einstein supported the use of radioactive elements for medical diagnostic purposes.

I hope this helps, good luck!

Answer:

75 years

Explanation:

The heart of the person beats 3.1x10⁹ times. As the heartbeat is 79 beat / min. The minutes the person lives are:

3.1x10⁹ beat * (1min / 79beat) = 3.92x10⁷ min.

1 hour are 60 minutes:

3.92x10⁷ min * (1 hour / 60min) = 6.54x10⁵hours

24 hours are 1 day:

6.54x10⁵hours * (1 day / 24h) = 2.725x10⁴ days.

1 year are 365 days:

2.725x10⁴ days * (1 year / 365 days) = 74.6 years.

In whole years are 75 years

Answer:

Meters, kilograms, kelvin, candela, mole, ampere, seconds.

Explanation:

These are the seven different types of measurements in chemistry. Hope it helps!

Answer:

[tex]m=8.7g[/tex]

Explanation:

Hello,

In this case, it is widely known that when measurements with different significant figures are put under mathematical operations, the final result must be displayed with the same amount of significant figures of the shortest measurement, thus, due to the fact that 5.5 g has two significant figures only the result is consequently shown with two significant figures as well as shown down below:

[tex]m=5.5g+2.27g+0.8995g\\\\m=8.6695g[/tex]

By rounding the first six to seven due to the fact that the next six is greater than five, according to rounding rules, the result is:

[tex]m=8.7g[/tex]

Best regards.

Answer:

187.3mL of 2.65M KOH you must add

Explanation:

The pH of the buffer of acetic acid is obtained as follows:

pH = pKa + log [Acetate] / [Acetic Acid]

Where [] could be moles of acetate and acetic acid

Replacing:

5.24 = 4.76 + log [Acetate] / [Acetic Acid]

0.48 = log [Acetate] / [Acetic Acid]

3.01995 = [Acetate] / [Acetic Acid](1)

As concentration of acetic acid is 0.796M and volume is 830mL, the moles of acetic buffer is:

0.830L * (0.796 moles / L) = 0.6607 moles

Thus:

0.6607 moles = [Acetate] + [Acetic Acid] (2)

Replacing (2) in (1):

3.01995 = 0.6607 moles - [Acetic Acid] / [Acetic Acid]

3.01995 [Acetic Acid] = 0.6607 moles - [Acetic Acid]

4.01995 [Acetic Acid] = 0.6607 moles

[Acetic Acid] = 0.16435 moles

[Acetate] = 0.6607 moles - 0.16435 moles = 0.49635 moles

The reaction of acetic acid with KOH to produce Acetate is:

Acetic acid + KOH → Acetate + Water

That means the moles of KOH you add, are the moles of acetate.

To add 0.49635 moles of 2.65M of KOH you need:

0.49635 moles * (1L / 2.65 moles) = 0.1873L =

Answer:

The molar heat capacity at constant volume is 21.62 JK⁻¹mol⁻¹

The molar heat capacity at constant pressure is 29.93 JK⁻¹mol⁻¹

Explanation:

We can calculate the molar heat capacity at constant pressure from

[tex]C_{p,m} = \frac{C_{p} }{n}[/tex]

Where [tex]C_{p,m}[/tex] is the molar heat capacity at constant pressure

[tex]{C_{p} }[/tex] is the heat capacity at constant pressure

and [tex]n[/tex] is the number of moles

Also [tex]{C_{p} }[/tex] is given by

[tex]{C_{p} } = \frac{\Delta H}{\Delta T}[/tex]

Hence,

[tex]C_{p,m} = \frac{C_{p} }{n}[/tex] becomes

[tex]C_{p,m} = \frac{\Delta H }{n \Delta T}[/tex]

From the question,

[tex]\Delta H[/tex] = 229.0 J

[tex]n[/tex] = 3.00 mol

[tex]\Delta T[/tex] = 2.55 K

Hence,

[tex]C_{p,m} = \frac{\Delta H }{n \Delta T}[/tex] becomes

[tex]C_{p,m} = \frac{229.0}{(3.00) (2.55)}[/tex]

[tex]C_{p,m} =[/tex] 29.93 JK⁻¹mol⁻¹

This is the molar heat capacity at constant pressure

For, the molar heat capacity at constant volume,

From the formula

[tex]C_{p,m} = C_{v,m} + R[/tex]

Where [tex]C_{v,m}[/tex] is the molar heat capacity at constant volume

and [tex]R[/tex] is the gas constant ([tex]R[/tex] = 8.314 JK⁻¹mol⁻¹)

Then,

[tex]C_{v,m} = C_{p,m} - R[/tex]

[tex]C_{v,m} = 29.93 - 8.314[/tex]

[tex]C_{v,m} =[/tex] 21.62 JK⁻¹mol⁻¹

This is the molar heat capacity at constant volume

Answer:

15 atoms

Explanation:

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Answer:

your answer is protista

Answer:

Plantae

Explanation:

I think the answer is plantae, beacuse plants are heterotrophs.

Answer:

a. x3 and x4 are the first to agree to two significant figures

b. x4 and x5 are the first to agree to three significant figures

Explanation:

8.30 x 10⁻⁵ = x1(0.100)²

8.30 x 10⁻⁵ = 0.01x1

x1 = 8.30 x 10⁻⁵/0.01 = 0.0083

8.30 x 10⁻⁵ = x2(0.100 + 0.0083)²

8.30 x 10⁻⁵ = (0.01172889)x2

x2 = 8.30 x 10⁻⁵/0.01172889

x2 = 0.007076543475128

8.30 x 10⁻⁵= x3 (0.100 + 0.007076543475128)²

8.30 x 10⁻⁵ = 0.011465386162581)x3

x3 = 8.30 x 10⁻⁵/0.011465386162581

x3 = 0.007239180505832

8.30 x 10⁻⁵ = x4 (0.100 + 0.007239180505832)²

8.30 x 10⁻⁵ = (0.011500241835562) x4

x4 = 8.30 x 10⁻⁵/0.011500241835562

x4 = 0.007217239531723

8.30 x 10⁻⁵ = x5 (0.1 + 0.007217239531723)²

8.30 x 10⁻⁵ = (0.011495536452803) x5

x5 = 8.30 x 10⁻⁵/0.011495536452803

x5 = 0.007220193710904

From the above results;

a. x3 and x4 are the first to agree to two significant figures

b. x4 and x5 are the first to agree to three significant figures

Answer:

The diameter of the hydrogen [tex]\mathbf{d =1.0605 \times 10^{-10}\ m}[/tex]

Explanation:

From the given information:

Using the concept of Bohr's Model, the equation for the angular momentum can be expressed as:

[tex]L = \dfrac{nh}{2 \pi}[/tex]

Where the generic expression for angular momentum is:

L = mvr.

replacing the value of L into the previous equation, we have:

[tex]mvr= \dfrac{nh}{2 \pi}[/tex]

[tex]v= \dfrac{nh}{2 \pi mr}[/tex] ----- (1)

The electron in the hydrogen atom posses an electrostatic force which gives a centripetal force.

[tex]\dfrac{ke^2}{r^2} = \dfrac{mv^2}{r}[/tex]   ----- (2)

replacing the value of v in equation (1) into (2), and taking r as the subject of the formula, we have:

[tex]\dfrac{ke^2}{r} = m (\dfrac{nh}{2 \pi mr})^2[/tex]

[tex]ke^2=\dfrac{n^2h^2}{4 \pi^2 mr}[/tex]

[tex]r =\dfrac{n^2h^2}{4 \pi^2 mke^2}[/tex]

For ground-state n = 1

[tex]h = (6.625 \times 10^{-34} \ J.s)^2[/tex]

[tex]m =( 9.1 \times 10^{-31} \ kg)(9 \times 10^9 \ N .m^2/C^2)[/tex]

[tex]Ke = (1.6 \times 10^{-19} \ C)^2[/tex]

[tex]r =\dfrac{(1)^2(6.625 \times 10^{-34})^2}{4 \pi^2 (9.1 \times 10^{-31} )(9 \times 10^9 ) (1.6 \times 10^{-19})^2}[/tex]

[tex]r =\dfrac{4.3890625 \times 10^{-67}}{8.27720295 \times 10^{-57}}[/tex]

[tex]\mathbf{r = 5.3025 \times 10^{-11} \ m}[/tex]

Therefore, the diameter of hydrogen d = 2r

[tex]\mathbf{d = ( 2 \times 5.3025 \times 10^{-11} \ m})}[/tex]

[tex]\mathbf{d =1.0605 \times 10^{-10}\ m}}[/tex]

Answer:

evidence you see with your eyes

Explanation:

Answer:

D

Explanation:

two different types of elements combine to form an acid

Answer:

A) increasing dispersion interactions

Explanation:

Polarizability allows gases containing atoms or nonpolar molecules (for example,  to condense. In these gases, the most important kind of interaction produces dispersion forces, attractive forces that arise as a result of temporary dipoles induced in atoms or molecules.

Dispersion forces, which are also called London forces, usually increase with molar mass because molecules with larger molar mass tend to have more electrons, and dispersion forces increase in strength with the number of electrons. Furthermore, larger molar mass often means a bigger atom whose electron distribution is more easily disturbed because the outer electrons are less tightly held by the nuclei.

Because the noble gases are all nonpolar molecules, the only attractive intermolecular  forces present are the dispersion forces.

The boiling point of the noble gas increases on moving down the group because of the increase in the dispersion force. Thus, option A is correct.

The noble gas has been consisted of the fully complete octet of the atom and has been less reactive in nature.

On moving down the group, there has been an increase in the number of shells of the atom with the increase in the atomic mass. The bigger molecules tend to have loosely bonded outermost electrons.

In noble gases, the force acting upon the molecule has been the Dispersion force. Since, the noble gas has a complete octet, the energy for removing the electrons and changing the state increase with the increase in the molecular mass.

The only force acting on the noble gases has been the dispersion force, Thus with an increase in the dispersion force, the boiling point increases. Thus, option A is correct.

For more information about the boiling point of the noble gases, refer to the link:

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Answer:

volatile

Explanation:

They are also poor conductors of electricity for they tend to form negative ions by gaining or sharing electrons [to be stable] unlike the metals. Hence, they have high ionization energy and high electronegativity values. In addition, nonmetals are usually volatile, which means that they evaporate easily

Answer:

Explanation:

Oxygen takes up less space as a liquid than as a gas, so engineers can fit more oxygen into the same tank.

Hope this helps

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Answer:

(masa, volumen y temperatura), las cuales miden valores que no sirven en sí para identificar una materia de otra, y otras denominadas Propiedades Características.

Explanation: