What does the formation of yellow color in the tube mean? What events lead to the formation of the yellow color?

Answer:

Explanation:

1 mol of anything is 6.02 * 10^23 atoms (in this case)

x mol of 3.01 * 10^22

Set up the proportion

1/x = 6.02*10^23 / 3.01 * 10^22                 Cross multiply

x*6.02 * 10^23 = 1 * 3.01 * 10^22               Divide by 6.02*10^23

x = 3.01 * 10^22 / 6.02*10^23

x = 1/(2 * 10)

x = 1/20 mol

x = 0.05 mol

The differences in the solubility between the two solvents that can be used to separate compounds liquid-liquid extraction is that some compounds will dissolve in one solvent and some compounds will dissolve in the other solvent.

The difference in the solubility of the compounds will help in the separating the solution that some of the compounds will dissolve in one solvent and the some of the compounds will dissolve in the other solvent. This is the method of separating the compounds in the mixture that  become separated into the two groups.

Two compounds that will have the different solubilities in the solvent can be separated from the each other by the Fractional Crystallization.

To learn more about solubility here

https://brainly.com/question/25798049

#SPJ4

Answer:

Sorry I want to help but I dont know the answer

It is known that Colligative property is directly proportional to molality or concentration. More the concentration more will be the elevation in boiling point or depression in freezing point. 0.15 m NaCl will have the lowest freezing point among all other given options.

Also colligative property depends on the number of particles as well.

the decreasing order of freezing point depression as follows:

0.15 m NaCl  > 0.20 m C₁₂H₂₂O₁₁  > 0.10 m HCl >  0.050 m CaCl₂ > 0.050 m CH₃COOH

Thus, 0.15 m NaCl will have the lowest freezing point.

[Note: 0.15 m NaCl = 0.30 m particle concentration (NaCl dissociate into two ions)

0.20 m C₁₂H₂₂O₁₁ = 0.20 m particle concentration (no dissociation of this molecule)

0.10 m HCl = 0.20 m particle concentration(HCl dissociate into two ions)

0.05 m CaCl₂ = 0.15 m particle concentration (CaCl dissociate into 3 ions)

0.05 m CH₃COOH = 0.10 m particle concentration (CH3COOH dissociate into two ions)

Learn more about freezing point from the link given below.

https://brainly.com/question/3121416

#SPJ4

Answer:

Ar(Mg)=24g

Ar(Cl)=35,5 and Cl2=35,5×2=71g

m=24g+71g=95g

(1) The volume of reconstituted solution is 5 mL. Option B is correct. (2)The amount of penicillin needed is 0.5 mL. Option A is correct. (3)Total 4 Mini-Bags o cover 24 hours of treatment. Option D is correct. (4)Total, 15 ml. will be needed to drawn up for one dose. Option D is correct. (5)The required amount of heparin solution is 8 mL. Option D is correct.

To calculate the volume of reconstituted solution needed to provide the 500 mg dose of ampicillin, we can use the formula;

Volume (mL) = Dose (mg) / Concentration (mg/mL)

Dose = 500 mg

Concentration = 100 mg/mL

Volume (mL) = 500 mg / 100 mg/mL

= 5 mL

Hence. B. is the correct option.

To calculate the amount of penicillin needed to provide the prescribed dose for each 50-mL MiniBag, we can use the ratio:

Prescribed dose : Total amount in the vial = Volume drawn up : Volume of the vial

Prescribed dose = 500,000 units

Total amount in the vial = 5,000,000 units

Volume of the vial = 20 mL

Volume drawn up = (Prescribed dose / Total amount in the vial) × Volume of the vial

Volume drawn up = (500,000 units / 5,000,000 units) × 20 mL

Volume drawn up = 0.1 mL

Hence, A. is the correct option.

To cover 24 hours of treatment, you would provide the number of MiniBags required to administer the prescribed dose every 6 hours:

24 hours / 6 hours = 4 MiniBags

Hence, D. is the correct option.

The required dose is 12 mg, and the available concentration is 4 mg/5 mL. We can use the ratio;

Dose : Concentration = Volume drawn up : Total volume

Dose = 12 mg

Concentration = 4 mg/5 mL

Volume drawn up = (Dose / Concentration)  ×  Total volume

Volume drawn up = (12 mg / 4 mg/5 mL)  ×  5 mL

Volume drawn up = 15 mL

Hence, D. is the correct option.

The required amount of heparin solution to be injected into the D5W 1000-mL bag can be calculated using the ratio:

Amount to be injected : Concentration = Volume drawn up : Total volume

Amount to be injected = 40,000 units

Concentration = 10,000 units/mL

Volume drawn up = (Amount to be injected / Concentration)  ×  Total volume

Volume drawn up = (40,000 units / 10,000 units/mL)  ×  2 mL

Volume drawn up = 8 mL

Hence, D. is the correct option.

To know more about heparin solution here

https://brainly.com/question/29799469

#SPJ4

Answer:

The energy of a ruby laser that produces red light with a wavelength of 5.00 × 10^-7 m is 3.98 × 10^-19 J.

Explanation:

The energy of a photon is given by the formula E = hf where h is Planck’s constant and f is the frequency of the photon. The frequency of the photon can be calculated using the formula f = c/λ where c is the speed of light and λ is the wavelength of the photon.

Substituting the given values, we get:

f = c/λ = 3.00 × 10^8 m/s / 5.00 × 10^-7 m = 6.00 × 10^14 Hz

E = hf = (6.626 × 10^-34 J s) × (6.00 × 10^14 Hz) = 3.98 × 10^-19 J

Therefore, the energy of a ruby laser that produces red light with a wavelength of 5.00 × 10^-7 m is 3.98 × 10^-19 J.

Hello again!! :)

The reaction of methyl iodide with sodium azide, NaN₃, proceeds by an SN2 mechanism. The effect of doubling the concentration of NaN₃ on the rate of the reaction is the rate increases by a factor of 2. The correct answer is C.

The alkyl halide is attacked by the nucleophile as the SN2 mechanism. as a partial bond is formed involving the nucleophile and carbon atom. Halide and carbon's bond partially dissolves. A transition is created where there are five bonds around the carbon atom. The product is created when the leaving group, which is a halide, removes the electrons from the C-X link and departs the molecule.

R-X + Nu⁻ → Nu 

--R--X → Nu-R + X⁻ 

Since a transition state that contains both a nucleophile and a substrate is used for the nucleophilic substitution. It was discovered that the concentration of the substrate and the nucleophile both affect the rate of the reaction.

Rate = k [substrate] [nucleophile]

Since sodium azide is the nucleophilic species and methyl iodide is the substrate,

Rate = k[CH₃I][NaN₃]

both the reactants take part in the reaction and the rate law for the reaction. As a concentration of NaN₃ is doubled, the new rate becomes,

Rate' = k[CH₃I][2 NaN₃]

        = 2 k[CH₃I][NaN₃]

        = 2 Rate

Learn more about SN2 mechanism at https://brainly.com/question/29561608

#SPJ4

The electron configuration of a potassium atom at ground state is 1s²2s²2p⁶3s²3p⁶4s¹. Therefore, option D is correct.

The electron configuration of an element can be explained as electrons being occupied in different energy levels of an atom of a specific element. In the electron configuration, the electrons are usually written as a superscript of atomic subshells. For example, the electron configuration of Helium can be represented as 1s²2s².

The sequence of completely filled subshells similar to neighboring the electronic configuration of a noble gas is represented by square brackets. The principal quantum number (n) will be used to denote the maximum number of electrons in an electron shell.

The total number of electrons occupied in the given electronic configuration  1s²2s²2p⁶3s²3p⁶4s¹  is 19. The atomic number of potassium is 19 therefore it is the configuration of potassium.

Learn more about electronic configuration, here:

brainly.com/question/5624100

#SPJ4

To produce CO2 (g), the necessary chemicals are a carbonate (such as sodium bicarbonate or calcium carbonate) and an acid (such as vinegar or hydrochloric acid). The net ionic equation would be: H+ (aq) + CO32- (aq) → CO2 (g) + H2O (l) or 2H+ (aq) + CO32- (aq) → CO2 (g) + H2O (l)

Based on your lab procedure, the necessary chemicals to produce CO2 (g) are typically a carbonate or bicarbonate salt, such as sodium carbonate (Na2CO3) or sodium bicarbonate (NaHCO3), and an acid, such as hydrochloric acid (HCl).

The net ionic equation for the generation of CO2 (g) using sodium bicarbonate (NaHCO3) and hydrochloric acid (HCl) is as follows:

HCO3- (aq) + H+ (aq) → CO2 (g) + H2O (l)

This equation represents the reaction between bicarbonate ions and hydrogen ions to produce carbon dioxide gas and water.

More on CO2 production: https://brainly.com/question/31519674

#SPJ11

Hydrogen Bonding is the strongest of the intermolecular forces because it is the attraction of the positively charged end of one molecule to the negatively charged end of another molecule.

Molecules are the smallest particles of matter that have all of the chemical properties of an element or compound. They are made up of two or more atoms held together by chemical bonds. Molecules can be made of different types of atoms and can vary in size, shape and structure. They are an essential part of all living organisms and are responsible for the formation of many chemical reactions.

1. Hydrogen Bonding

2. Dipole-Dipole Interactions

3. London Dispersion Forces

4. Ion-Dipole Interactions

Rank from weakest to strongest IMF:

3. London Dispersion Forces

2. Dipole-Dipole Interactions

4. Ion-Dipole Interactions

1. Hydrogen Bonding

London Dispersion Forces are the weakest of the intermolecular forces because they are a temporary attraction of the electrons of the atoms of two different molecules. Dipole-Dipole Interactions are slightly stronger than London Dispersion forces because they are the attraction of a positive end of one molecule to the negative end of another molecule. Ion-Dipole Interactions are stronger than Dipole-Dipole Interactions because they are the attraction of an ion to the oppositely charged end of a molecule. Finally, Hydrogen Bonding is the strongest of the intermolecular forces because it is the attraction of the positively charged end of one molecule to the negatively charged end of another molecule.

To know more about molecules click-

https://brainly.com/question/26556885

#SPJ1

Answer:

Bromine atom would have smallest radius.

Explanation:

As we know that on ascending down the group the size of atom increases as a new shell is added on ascending by one step... so Iodine has a greater size than Bromine.

As bromine is a halogen atom, so it's ionisation enthalpy is the most in it's period.. so it cannot loose an electron to form a Br+ cation.. so it forms a Br- anion.. by accepting a. electron, so as 1 electron is added to the shell.. the electrons have increased than the no. of protons, so the size would increase as the protons now have to hold more electrons than before, so attraction would decrease. A second reason can also be mentioned as when an electron is added to an atom, it experiences some repulsion from other electrons in same energy shell, so the size would increase. Screening effect of the mid shell electrons also contribute in increasing the size of atom. So Bromine ion would have a greater size than Bromine atom.

By the same analogy the iodine ion would also have grater size than the iodine atom, it also becomes greater in size than the bromine atom..

THUS THE BROMINE ATOM HAS THE LEAST RANKING WHEN ARRANGED IN DECREASING SIZE OF GIVEN SPECIES!!!

Answer:

Mechanical weathering breaks rocks into smaller pieces without changing their composition. … Chemical weathering breaks down rocks by forming new minerals that are stable at the Earth's surface. Water, carbon dioxide, and oxygen are important agents of chemical weathering.

Explanation:

brainlist me pls and I'm right, correct me if I'm wrong

Answer:

Mechanical weathering reduces the size of rocks without altering their content.

Chemical weathering damages rocks by creating new materials that are stable on earth's surface.

Answer:

the solution is acidic as its ph has already exceeded the neutral level

\(1.1 X 10^-9 M\) is the [H] in a solution with a pH of 9.92.

pH is the quantitative measure of the acidity or basicity of aqueous or other liquid solutions.

The pH of a solution is usually found by the following expression:

pH=-log [\(H^+\)]

Therefore, to find the concentration of \(H^+\) we can rearrange this expression and thus,

= [\(H^+\)] = \(10^-^{pH}\)

= [\(H^+\)] = \(10^-^{9.92}\)

=\(1.1 X 10^-9 M\)

Learn more about pH here:

https://brainly.com/question/27359971

#SPJ2

An atom is the submicroscopic particle that constitutes the fundamental building block of ordinary matter.

Everything that takes up space and has mass is considered to be matter. Atoms are the minuscule constituents of matter. Therefore, these atoms are thought of as the fundamental units of matter. They are frequently referred to as subatomic particles because they are what make up atoms. There are three subatomic particles: protons, neutrons, and electrons.

Atoms are the basic building blocks of matter and make up all matter at its most basic level. These atoms frequently come together to create molecules, which are made up of two or more atoms connected to one another in particular geometric configurations.

Learn more about atom here:

brainly.com/question/1566330

#SPJ4

Answer:

When fuels are burned in vehicle engines, high temperatures are reached. At these high temperatures, nitrogen and oxygen from the air combine to produce nitrogen monoxide. When this nitrogen monoxide is released from vehicle exhaust systems, it combines with oxygen in the air to form nitrogen dioxide.

Explanation:

Explanation:

Nitrogen and oxygen from the air combine at high temperatures in the engine to produce nitrogen (II) oxide by the reaction :

N2(g) + O2(g) → 2NO(g).

Nitric oxides rise in the atmosphere and are oxidized to nitrogen dioxide, NO2 which dissolves in the precipitating water to form acid rain.

Answer:

Option A is correct (barite)

Explanation:

Given data:

Mass of  mineral = 51.00g

Volume of water = 50.0 mL

Volume of water + mineral = 61.4 mL

Density of mineral = ?

Solution:

First of all we will calculate the volume of mineral.

Volume of mineral = (volume of water + mineral) - Volume of water

Volume of mineral = 61.4 mL - 50.0 mL

Volume of mineral = 11.4 mL

Density of mineral:

d = m/v

d = 51.00 g / 11.4 mL

d = 4.48 g/cm³ (1mL = 1 cm³ )

Thus the mineral is barite.

Yes, temperature does have an effect on the solubility of organic solids in a solvent. As temperature increases, the solubility of organic solids generally increases as well.

Effect of temperature on solubility of organic solids in a solvent is as follows :-

Generally, the solubility of organic solids in a solvent increases with increasing temperature. This is because as temperature increases, the kinetic energy of the particles in the solvent increases, making them more likely to break apart the bonds in the solid and dissolve it.

However, this relationship may not hold true for all organic solids, as some may have a decrease in solubility at higher temperatures due to changes in their molecular structure. Additionally, the type of solvent used can also affect the solubility- for example, some solvents may have a higher solubility for organic solids at lower temperatures.

Learn more about effect of temperature on solubility : https://brainly.com/question/17071337

#SPJ11

For the electrochemical cell shown, the necessary concentration of H+ ions for the reaction to be in equilibrium with no transfer of electrons through the external circuit is 1 M.

This is because the standard potential of the Pt/H electrode is 0 volts, and the standard potential of the Pb electrode is -0.13 volts. Since the two half-cells have the same concentration (1 M), the potential difference between them is 0 volts, and thus no net transfer of electrons through the external circuit occurs.

Learn more about electrochemical cell:

https://brainly.com/question/10470515

#SPJ4

Answer:

Something that's interdisciplinary covers more than one field of study. If you take an interdisciplinary science and literature class, you might read a science fiction novel and then explore the scientific ideas behind it. ... Interdisciplinary means between fields, but they don't have to be unrelated disciplines.

Explanation:

hope this helps:)

Answer:

FAD is the correct answer

Explanation:

pls choose it as the brainiest answer

Answer:

It is alkyne

Explanation:

The property of the covalent compound that is influenced by ionic character is boiling point. Option B

We know that for compounds, the kind of bonds that they have are usually neither here nor there. The bonds would have an ionic character and also a given amount of the covalent character.

We must note that the ionic character of a bond is very important when we discuss intermolecular interactions and they do affect the boiling points of the substances very much.

Learn more about boiling point:https://brainly.com/question/2153588

#SPJ1

Answer:

Reduction

Explanation:

An easy thing to remember is:

Oxidation= adding oxygen

Reduction= taking away oxygen

Reduction (reduce)

Explanation:

14) We need to find the # of moles of NaOH in 3.5 L solution. Note: 1 M = 1 mol/Ll

(3.00 mol NaOH/1 L)(3.5 L) = 10.5 mol NaOH

Next we need find the volume of 19.4M NaOH solution that contains 10.5 mol NaOH:

(10.5 mol NaOH)×(1 L NaOH/19.4 mol NaOH)

= 0.541 L NaOH

This means that 0.541 L (541 mL) of 19.4M NaOH solution must be diluted to 3.5 L in order to get 3.00M NaOH solution.

15) 425 mL (0.425 L) of 0.105M HCl solution contains

(0.105 mol HCl/1 L)×(0.425 L) = 0.0446 mol HCl

so when enough water is added to 1L, the molarity becomes

0.0446 mol HCl/1 L = 0.0446M HCl

16) CaBr2 ---> Ca^+2 + 2Br^-1

For every Ca^+2 ion in the solution, you have 2 Br^-1 ions

If the concentration of CaBr2 is 6 mol/L (or 6M),.then the concentration of Br^-1 irons is

[Br^-1] = 2×[Ca^+2] = 2×(6 mol/L) = 12 mol Br^-1/L

17) The reason you won't need 1.0 L of water is that part of the volume of the solution is taken up by the NaOH so you will always need slightly less than 1 L.

The reaction of chlorobenzene is

\(C_6H_6 + HNO_2 + HCl-- > C_6H_5N_2Cl + H_2O\\C_6H_5N_2Cl + CuCl + HCl-- > C_6H_5Cl + CuCl_2 + N_2\)

The transformation of benzene to chlorobenzene through a diazonium intermediate involves the following steps:

Step 1: Diazotization

Benzene is first converted to a diazonium salt using nitrous acid and hydrochloric acid (HCl) at low temperatures.

\(C_6H_6 + HNO_2 + HCl-- > C_6H_5N_2Cl + H_2O\)

Step 2: Replacement of Diazonium group with Chlorine

The diazonium salt is then treated with cuprous chloride (CuCl) in the presence of hydrochloric acid (HCl) to replace the diazonium group with a chlorine atom to form chlorobenzene.

\(C_6H_5N_2Cl + CuCl + HCl-- > C_6H_5Cl + CuCl_2 + N_2\)

The overall reaction is:

\(C_6H_6 + HNO_2 + HCl-- > C_6H_5N_2Cl + H_2O\\C_6H_5N_2Cl + CuCl + HCl-- > C_6H_5Cl + CuCl_2 + N_2\)

The final product is chlorobenzene, which is formed by the replacement of the diazonium group with a chlorine atom.

To learn about the transformation of benzene:

https://brainly.com/question/27755348

#SPJ4