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Answer:

The amount of sodium chloride.

Explanation:

This is because an independent/manipulated control is something that is changed or controlled by the experimenter. Jax has control over the change of sodium, therefore the answer is the amount of sodium chloride.

I took the test and got this answer right btw. Good luck everyone :)

Answer:

They are just two....Ca and OH

Explanation:

one substance

+one substance=balanced of chemical equation

Answer:

0.51

Explanation:

i got it wrong multiple times just for this to be the answer.

listening to mitski while crying over this science goodluck

Answer:

One Lone Pair. (I think)

Explanation:

Answer: This means that the color of light with a higher frequency will have a lower wavelength and valence electron energy level.

Explanation:

Selectivity is relatively easy to alter, with mobile phase composition and stationary phase being the primary means of adjustment. The hydrophobicity, polarity and nature of the chosen stationary phase all play a crucial role in analyte interaction and directly affect the selectivity of a separation.

In chromatography, it is important to select a good stationary phase so as to ensure proper separation of components.

Chromatography is a separation technique which is generally used for separating substances based on their solubilities. The technique makes use of two phases the mobile phase and the stationary phase.

The components are separated from each other based on their solubility in the mobile phase. Component which is least soluble does not travel along the mobile phase while component which is highly soluble travels with the mobile phase.

The difference in the solubility of the components is measured with the reference to the solvent front and is expressed in terms of Rf value.Chromatography finds application in forensics, separation of organic compounds,etc.

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El agua se purifica a partir de un proceso de filtrado. Las características que evidencian el filtrado incluyen pH normal, color cristalino, ausencia de metales pesados y/o microorganismos, etc.

Las características que permiten determinar si el agua ha sido correctamente filtrada incluyen:

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Answer:

It has a high electrical conductivity, caused by dissociation through protonating itself, a process known as autoprotolysis. The comparable equilibrium constant for water, Kw is 10−14, a factor of 1010 (10 billion) smaller.

Plasma is one of the four common states of matter. A plasma is an electrically charged gas. In a plasma, some electrons have been stripped away from their atoms.

Explanation:

Plasma is one of the states of matter that are electrons stripped from the nucleus

Answer:

Elements in the same period have the same (number of electron shells)

Answer:

D. The ratio of the substances coefficients equals the ratio of their numbers of moles.

Answer:

[tex](b) \: apparent \: magnitude \\ \\ [/tex]

Explanation:

Astronomers define star brightness in terms of apparent magnitude — how bright the star appears from Earth — and absolute magnitude — how bright the star appears at a standard distance of 32.6 light-years, or 10 parsecs.

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The measurement of a star depends on the distance of the star from earth

is Apparent magnitude.

The apparent magnitude of a star is how bright the star appears in the sky

from the earth. The apparent magnitude of a star depends on two main

factors known as:

These factors help to accurately determine the brightness of stars in the

solar system.

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Answer:  Count only the electrons in the highest shell s and p orbitals when determining valence.

Explanation:  I'm glad you asked this question.  It is often not well explained.   The term valence electrons is assigned to only the electrons in an element's highest energy level.  These reside only in the s and p orbitals, and not the d or f, as I'll explain later.  The s orbital can hold 2 electrons and the p can hold 6.  Potassium, K, has an s orbital in its highest energy shell, 4.  It contains only 1 electron, so it has a valency of 1.  

Calcium, Ca, has 2 in its highest energy level: 4s^2, so it has a valency of 2.   Moving to the right, the element scandium, Sc, add another electron, but it goes into the 3d orbital.  3d is in the 3rd energy shell, so it is not counted as a valence electron.  Only after we move further right, to gallium, Ga, do we start adding electrons to the 4th energy level again - the 4p orbitals can accept up to 6 electrons.  Ga has 3 valence electrons - 2 in the 4s and 1 in the 4p.  Oxygen has 2 in the 2s and 4 in the 4p orbitals, for a total of 6.  It is close to having a comple outer shell (2 in the 2s and 6 in the 2p).  Just 2 more electrons would fill both the 2s and 2p orbitals for a total of 8 valence electrons, a stable configuration (the same configuration as thje stable gas Neon).

Answer:

option B it was captured by earth's gravity

Explanation:

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2Al+6HCl ->2AlCl3+3H2      .nAl=m/M=13,5/27=0,5(mol) =>nH2=0,5.3/2=0,75(mol)....VH2=n.22,4=0,75.22,4=16,8(lít)...

Answer:

8

Explanation:

Hope this helps you :)

The atomic number of fluorine is 9.

The charge number of an atomic nucleus is known as the atomic number or nuclear charge number of a chemical element. It will be is equal to the proton number of every atom of that element, for ordinary nuclei. Atomic number helps to getting information of elements with the aid of periodic table.

Atomic number = count of proton

It is known that the atomic number of fluorine is 9 . therefore, the answer will be atomic number.

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Answer:

The 1st and 2nd ones on the top

Explanation:

Hope this helps:)

Answer:

good morning I am going home with 6

Washing clothes

linking a brake pedal to the brake pads at the wheels of a car

dissolving sugar

painting a wall

Explanation:

Ionic solutions are known to be electrolytes due to the presence of free ions. Covalent solutions are non-electrolytes hence the decrease the conductivity of the ionic solutions.

Electrolytes are solutions that conduct electricity. The charge carriers in solution are ions. These ions are mobile. Covalent substances are molecular in nature. They do not contain ions hence they do not give ions when dissolved in water.

The conductivity of ionic solutions owes to the presence of ions in solution. The higher the concentration of ions in solution, the greater the conductivity of the solution. When covalent substances are mixed with ionic solutions, the concentration of ions decreases and the conductivity of the solution decreases.

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Based on the trend of electronegativities values of the elements Be, Mg, Ca, and, Sr within their group (increasing from bottom to top), the atoms of the element Sr will have the least attraction for an electron.  

We need to remember that electronegativity indicates the affinity or attraction of an element for an electron. Hence, the higher the electronegativity, the higher the attraction of that element for an electron.  

The values of electronegativities of the given elements are the following:

Be = 1.57

Mg = 1.31

Ca = 1.0

Sr = 0.95

We can see that the increasing trend of electronegativities in this group is from the bottom to the top, having the Sr with the lowest electronegativity value and the Be with the highest.  

This trend is related to atomic size, the larger the atomic size, the lower the electronegativity because the electron in the outermost shell will feel less attraction towards the nucleus of an atom. In a group of the periodic table, the size of an atom will increase from top to bottom.          

Therefore, according to the said above, the atoms of the Sr will have the least attraction for an electron (it has the lower electronegativity value).

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Answer:

lattices

Explanation:

Ionic compounds are crystalline solids under normal conditions, have high melting points, and form lattices at the macroscopic level. Almost all of these solids dissolve in water and conduct electricity when dissolved. These substances are known as electrolytes because they can conduct electricity when in solution.

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Answer:

0.027

Explanation:

the beginning of each word (milli) just means a thousand.

take both number 27s and divide by 1000

it should be 0.027 for both.

you can also just ppretend there is a decimal place after 27 and move it to the left 3 spaces

Answer:

there is no following so sorry

Answer:

12

Explanation:

6 moles multiplied 2 atoms of O2

That gives 12 atoms

Answer:

When excited electrons fall back to the ground state, they release energy in the form of photons of light. These photons of light create the colors observed in a line-emission spectrum.

Explanation: