Which type of model best represents crystals?


A. ribbon


B. space-fill


C. ball-and-stick


D. Lewis dot

The mass of the chlorophenol  is obtained from the number of moles and the volume of the solution.

Recal that;

Number of moles = concentration of solution * volume of solution

Concentration = 47.0 mM  or 47.0 * 10^-3 M

Volume = 1.00 litre

Number of moles = 47.0 * 10^-3 M * 1.00 litre

Number of moles = 47.0 * 10^-3 moles

Also;

Number of moles = mass/molar mass

mass = Number of moles * molar mass

Mass = 47.0 * 10^-3 moles * 128.6 g/mol

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Mass = 6.0442 g

We can separate out a small sample of the dyes for identification purposes, but not separate the entire mixture by using chromatography.

Chromatography is a technique of separation of mixtures of liquids according to the nature of those liquids.

To get the process started, the mixture is dissolved in a substance called the mobile phase, which carries it through a second substance called the stationary phase.

The different components of the mixture travel through the stationary phase at different speeds, causing them to separate from one another. The nature of the specific mobile and stationary phases determines which substances travel more quickly or slowly, and is how they are separated. These different travel times are termed retention time.

Therefore, We can separate out a small sample of the dyes for identification purposes, but not separate the entire mixture by using chromatography.

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Answer:

Answer is b gravity only

Answer:  36.1%

Explanation:  The molar mass of the complete molecule, CuSO4*5H2O is 249.6 g/mole.  The molar mass of just the water (5H20) is 90 g/mole.  Assume 1 mole of CuSO4*5H2O, the percent water would be:

90g H2O/249.6g CuSO4*5H2O = 0.361 or 36.1%

BH2Cl is a polar compound because the molecule is non-symmetrical.

An ionic bond is usually formed between atoms having a high magnitude of electronegativity difference between them while covalent molecules tend to have a narrower range of electronegativity difference between atoms in the molecule.

In-between the two extremes are the polar covalent bonds which result from a significant electronegativity difference but less than that required for an ionic bond.

The B-Cl bond in BH2Cl is polar and the entire molecule is non-symmetrical hence the BH2Cl is a polar compound.

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Chemists prefer ribbon diagrams because they make the tertiary structure of the protein molecule easier to trace.

A protein molecule can be represented using several kinds of models. The ball and stick models which are common representations for other molecules can also be applied in the case of protein molecules.

However, the ribbon diagrams are preferred by chemists because they make the  tertiary structure of the protein molecule easier to trace. Also, the ribbon diagram shows the overall path and organization of the protein backbone in the protein molecule.

This kind of structure was first introduced by  Jane S. Richardson  around 1981.

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Answer:

Ribbon diagrams look like the name they hold- ribbons. Therefore, they would be a good option if one were to trace or copy the diagram onto another document, etc. Also, they depict protein very well so if a chemist were studying different types of protein he/she would utilize a ribbon diagram.

Explanation:

Answer:

120

Explanation:

Answer:

Ether is the correct answer

Explanation:

It is based.

Answer:

Explanation:

Image result for describe five factors which affect propagation of sound.. please describe in details.​

There are several important factors which affect the propagation of sound: geometric spreading, atmospheric effects, and surface effects. These are discussed separately below. This refers to the spreading of sound energy as a result of the expansion of the wavefronts.

Answer:

The relative reactivity of carboxylic acid derivatives toward nucleophile substitutions is related to the electronegative leaving group's ability to activate the carbonyl. The more electronegative leaving groups withdraw electron density from the carbonyl, thereby increasing its electrophilicity.

Answer:

oxytocin is the answer

Explanation:

oxytocin

Answer:

give me brainliest

Explanation:

The shielding effect sometimes referred to as atomic shielding or electron shielding describes the attraction between an electron and the nucleus in any atom with more than one electron. The shielding effect sometimes referred to as atomic shielding or electron shielding describes the attraction between an electron and the nucleus in any atom with more than one electron.

Answer:

The shielding effect can be defined as a reduction in the effective nuclear charge on the electron cloud

Explanation:

i am not sure but i hope it will help you

Explanation:

Magnesium chloride = MgCl₂

aluminum nitrate= Al(NO₃)₃

ammonium sulfate=( NH₄)₂SO₄

Answer:

HCl(g) + H₂O(l) -> Cl⁻(aq) + H₃O⁺(aq)

Explanation:

Usually when we have HCl in a lab, it's already dissolved in water. It's just HCl(aq). If we want to look at adding pure HCl, that'll be a gas. We should note that HCl is a strong acid that will break apart completely. One might not say that this is a chemical reaction so much as a dissociation. Strong acids are proton donors and form hydronium cations in aqueous solution.

The balanced equation for the ionization of hydrochloric acid (HCl) in water, forming hydronium ions (H₃O⁺) and chloride ions (Cl⁻) is:

HCl(aq) + H₂O(l) → H₃O+(aq) + Cl⁻(aq). The symbol for hydrochloric acid is HCl. H₂O stands for water. The hydronium ion, or H₃O+, is created when the acid HCl gives a proton (H+) to a water molecule.

The chloride ion, which is what's left of the HCl molecule after it's been ionized, is denoted by the symbol Cl-.

The reaction can move both in the forward (ionization) and backward (recombination) directions, according to the double arrow ().

Thus, The balanced equation for the ionization of hydrochloric acid (HCl) in water, forming hydronium ions (H₃O⁺) and chloride ions (Cl⁻).

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Answer:

here is the answer

Explanation:

Diffusion is a process of passive transport in which molecules move from an area of higher concentration to one of lower concentration.

Answer:

Look in explanation

Explanation:

I have shown the Lewis diagram as well as the square and sphere representation.

Answer:

3.55e-7

Explanation:

Answer:

a. 1 mole O2

b. 2 moles H2O

Explanation:

a. 2 moles H2 x [tex]\frac{1 mole O2}{2 moles H2}[/tex] = 1 mole O2

B. 2 moles H2 x [tex]\frac{2 moles H2O}{2 moles H2}[/tex] = 2 moles H20

Answer:

OPTION B .

AS THEY WILL PRODUCE CO,CO2 WHICH WILL MAKE AIR POLLUED AS WELL AS RISE THE TEMPERATURE

Answer:

Gas

Explanation:

Do not put any sub- stance into the flame unless specifically instructed to do so. Never reach over an exposed flame. Light gas (or alcohol) burners only as instructed by the teacher.

Answer:

This is not a true solution because the colloidal dispersion is not completely homogeneous, and it does not have uniform properties throughout.

Explanation:

hope i helped

Conversion from one unit to another requires the use of a conversion factor.

We are required in the problem to express our result in the form; a x 10^b

To convert from μm to m, the conversion factor to use is [tex]1 * 10^-6[/tex]

So;

1 μm = [tex]1 * 10^-6[/tex] m

0.16 μm =  0.16 μm * [tex]1 * 10^-6[/tex] m/1 μm

= [tex]1.60 * 10^-7[/tex] m

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Answer:

[tex]Fe_2O_3[/tex]

Explanation:

The formula of Rust is Fe2O3 and also known as ferric oxide or iron oxide

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OAmalOHopeO

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Answer:Dating Using Radioactive Decay

The best-known techniques for radioactive dating are radiocarbon dating, potassium-argon dating and uranium-lead dating.

After one half-life has elapsed, one half of the atoms of the nuclide in question will have decayed into a “daughter” nuclide.

Explanation:d

Answer:

Solvus: A solvus is a line or surface on a phase diagram which separates a homogeneous solid solution from a field of several phases which may form by exsolution or incongruent melting.

Eutectic: Relating to or denoting a mixture of substances that melts and freezes at a single temperature that is lower than the melting points of the separate constituents or of any other mixture of them.

Eutectoid: relating to or denoting an alloy which has a minimum transformation temperature between a solid solution and a simple mixture of metals.

Peritectic: A peritectic reaction is a reaction where a solid phase and liquid phase will together form a second solid phase at a particular temperature and composition.

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Answer:

1.5055×10²⁴

Explanation:

................................

The volume of NaOH required is 0.08 dm³

To solve this question, we'll begin by writing the balanced equation for the reaction between H₂SO₄ and NaOH. This is illustrated below:

H₂SO₄ + 2NaOH —> Na₂SO₄ + 2H₂O

From the balanced equation above,

Mole ratio of the acid, H₂SO₄ [tex](n_{A}) = 1[/tex]

Mole ratio of the base, NaOH [tex](n_{B}) = 2[/tex]

Next, we shall determine the volume of NaOH required to react with H₂SO₄. This can be obtained as follow:

Molarity of the base, NaOH [tex](M_{B}) = 0.505 M[/tex]

Volume of the acid, H₂SO₄ [tex](V_{A}) = 40 mL[/tex]

Molarity of the acid, H₂SO₄ [tex](M_{A}) = 0.505 M[/tex]

[tex]\frac{M_{A} * V_{A}}{M_{B} * V_{B}} = \frac{n_{A}}{n_{B}}\\\\\frac{0.505 * 40}{0.505 *V_{B}} = \frac{1}{2}\\\\\frac{20.2}{0.505 *V_{B}} = \frac{1}{2}[/tex]

Cross multiply

[tex]0.505 * V_{B} = 20.2 * 2\\0.505 * V_{B} = 40.4[/tex]

Divide both side by 0.505

[tex]V_{B} = \frac{40.4}{0.505}\\\\V_{B} = 80 mL[/tex]

Finally, we shall convert 80 mL to dm³. This can be obtained as follow:

[tex]1000 mL = 1 dm^{3}\\\\Therefore,\\\\80 mL = \frac{80 mL * 1dm^{3}}{1000 mL}\\\\80 mL = 0.08dm^{3}[/tex]

Therefore, the volume of NaOH required is 0.08 dm³

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