Does solubility change with ph for CaBr2, CaCl2, Ca(OH)2 and MgCl2. What pH would you expect to see highest solubility?

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:

Answer:

Question is incomplete.

Answer:

2) 0.109 mol

Explanation:

The density of butan-1-ol is 0.8098g/mL. And its molar mass is: 74.121g/mol.

First, we need to convert volume of butan-1-ol to mass:

10.0mL * (0.8098g / mL) = 8.098g of butan-1-ol

Now, we need to convert these grams to moles using molar mass:

8.098g * (1mol / 74.121g) = 0.109 moles of butan-1-ol

Right answer is:

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: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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Answer:

[tex]\% m/m=0.59\%[/tex]

Explanation:

Hello,

In this case, since the by mass percent is for potassium in this vitamin is:

[tex]\% m/m=\frac{m_K}{m_K+m_W}*100\%[/tex]

Thus, for 3500 mg of potassium that in grams are 3.5, the by mass percent turns out:

[tex]\% m/m=\frac{3.5g}{3.5g+591.5g}*100\%\\\\\% m/m=0.59\%[/tex]

Best regards.

Answer:

C. Mantle

Explanation:

mantle is the inside of the Earth

Answer:

C... i think

Explanation:

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:

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:

evidence you see with your eyes

Explanation:

Answer:

Since elements in a group have the same number of valence electrons, they behave similarly in chemistry. An example would be the alkali metals (excepting hydrogen. Hydrogen is in this group only because it has one valence electron.

Explanation:

because it is

Answer:

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

Explanation:

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

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

plz mark as brainliest!!!!!!!

Explanation:

the atomic radius of ( Sn) is 225pm

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:

.Heat energy can be transferred from one object to another. The transfer or flow due to the difference in temperature between the two objects is called heat.

Explanation:

The transfer of thermal energy is called heat. In this process, thermal energy moves through a substance.  For example, an ice cube has heat energy and so does a glass of lemonade.

Answer:b

Explanation:

Answer:

15 atoms

Explanation:

plz mark as brainliest

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.

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Answer:

your answer is protista

Answer:

Plantae

Explanation:

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

Answer:

See attached picture.

Explanation:

Hello,

In this case, for the given compound, since it is a salt, it contains a cation (positive charge) and an anion (negative charge), thus, since chlorine tends to gain electrons, it is negative whereas the nitrogen-containing side is positive, forming the anion and cation respectively. Moreover, for the drawing of its Lewis structure we must know that the chlorine is likely to interact via its seven valence electrons with nitrogen via its five valence electrons wherein four are bonded with four methyl radicals forming the tetramethylammonium chloride as shown on the attached picture.

We must realize that the nitrogen remain positively charged due to the presence of an extra bond with one methyl group (one carbon bonded to three hydrogens) which allow the formation of the salt.

Regards.

The Lewis structure for compound [tex](CH_3)_4NCl[/tex] is attached in the image below as an attachment.

Lewis  structures are also called as electron dot structures and can be drawn if the molecular formula of a compound is known. It provides information regarding the nature of bond and the position of atoms .

They are also capable of exhibiting the lone pair if any present in a molecule or compound.Lewis defined a base to be an electron pair donor and an acid to be an electron pair acceptor.

Thus, the Lewis structure for compound [tex](CH_3)_4NCl[/tex] is attached in the image below as an attachment.

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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:

They are two different objects and they measure things differntly

Explanation:

Answer:

Which part of the immune system is a physical barrier?

> Skin.

How can individuals in communities prevent the global spread of hepatitis C?

> By avoiding the blood of other people.

A)skin is a physical barrier.

The physical barrier is incorporating the stratum corneum, corneocytes, and lipid layers, as well as the nucleated epidermis.

The skin provides an effective barrier between the organism and the environment, preventing the invasion of pathogens and fending off chemical and physical assaults, as well as the unregulated loss of water and solutes.

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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:

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:

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]