the empirical formula of a group of compounds is chcl lindane a powerful insecticide is a member of this group

The functional group that the molecule below contain is: c. Hydroxyl.

The hydroxyl group , which is a distinctive functional group of alcohols and phenols, is composed of an oxygen atom bound to a hydrogen atom. The provided molecule is an alcohol since the hydroxyl group is joined to a carbon atom.

A carbon atom is doubly bound to an oxygen atom in the carbonyl functional group (>C=O), whereas an oxygen atom is coupled to two carbon atoms in the ether functional group (-O-). A distinctive functional group of amines is the amino functional group (-NH2), which consists of a nitrogen atom bound to two hydrogen atoms.

Therefore the correct option is C.

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Answer: its B)

Explanation:

it got the other answer wrong

Answer:

has

Explanation:

has

Answer:

has

Explanation:

Answer:

Carbon dioxide and silicone dioxide are both made with only non metals, magnesium oxide is formed with a metal and a non metal, Carbon dioxide has double bonds O=C=O, while silicone dioxide is made of single bonds.

Answer:

PUT THE TOOTHPAST ON CABBAGE AND CHECK IT OUT AFTER A DAY

The specific heat capacity is  the quantity of heat (J) absorbed per unit the mass (kg) of the material. when you try to heat up the substance that has a high specific heat , it will takes the more energy to rise the temperature .

The specific heat capacity is  the quantity of heat (J) that absorbed the per unit mass (kg) of the material.  when its temperature will increases 1 K or the 1 °C, and the unit of the specific heat capacity is   J/(kg K) or the J/(kg °C).

ween we try to heat up the substance that has the high specific heat capacity then it will takes the more energy to rise the temperature .

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The final composition of the resulting solution of 10^-2 M NH4Cl and NaHS will have a pH of 9.36.

We are given the concentration of NH4Cl and NaHS as 10^-2 M.The ammonium ion (NH4+) will undergo hydrolysis in water and form NH3 and H+.NH4+ + H2O ⇌ NH3 + H+ (acid-base reaction)The reaction shows that the ammonium ion is an acid and will produce hydrogen ions in an aqueous solution.On the other hand, sodium hydrogen sulfide (NaHS) is a weak base and undergoes hydrolysis in an aqueous solution.NaHS + H2O ⇌ NaOH + H2SThe equation shows that hydrogen sulfide (HS-) is a weak acid and will produce hydroxide ions in an aqueous solution.The hydrolysis reactions of the two salts lead to an increase in hydroxide ions (OH-) in the solution, leading to a basic solution.

We can calculate the pH of the solution using the Kb values of NaHS and the Ka value of NH4+.NH4+ + H2O ⇌ NH3 + H+Ka = [NH3][H+]/[NH4+]Kb = [HS-][OH-]/[NaHS]We can assume the concentrations of NH3 and HS- to be the same, let's assume it is x, then the equilibrium constant can be expressed as:Kw = Ka × Kb[H+][OH-] = Ka × Kb[H+][OH-] = (1.8 × 10^-5) × (1.2 × 10^-13) = 2.16 × 10^-18pH + pOH = 14pH + pOH = 14pH = 14 - pOHpOH = -log[OH-] = -log(1.47 × 10^-8) = 7.83pH = 14 - 7.83 = 6.17We can conclude that the pH of the resulting solution will be 9.36 and the final composition of the resulting solution of 10^-2 M NH4Cl and NaHS will be basic.

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Answer:

hydrogen and nitrogen or something?

Explanation:

Answer:

nitrogin and i forgot the other one srry!!

Explanation:

The elements that typically form anions are only nonmetals.

Anions are negatively charged ions, which means they have gained electrons. Nonmetals, such as fluorine and oxygen, have a high electronegativity and therefore have a strong tendency to gain electrons and form anions. In contrast, metals and transition elements have a lower electronegativity and are more likely to lose electrons and form cations, or positively charged ions.

Therefore, the correct answer to the question is only nonmetals.

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Based on the given information, the two reactants that would give the described product via a Suzuki coupling are:

An alkyne where carbon 1 is bonded to a benzene ring and carbon 2 is bonded to hydrogen.

An alkene where carbon 1 is bonded to bromine and carbon 2 is bonded to benzene. The stereochemistry is cis.

The Suzuki coupling is a widely used cross-coupling reaction that involves the palladium-catalyzed cross-coupling of an organoboron compound (such as a boronic acid) with an organic halide or pseudo-halide. In this case, the reactants that can undergo the Suzuki coupling are the alkyne and the cis-alkene described above.

The alkene and alkyne provide the necessary carbon-carbon bond formation, while the benzene rings and hydrogens ensure the desired connectivity in the product. The palladium tetrakis triphenyl phosphine catalyst, heat, and sodium carbonate facilitate the coupling reaction, resulting in the formation of the biaryl product with the specified stereochemistry.

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Answer:

A reaction rate I believe is the time it takes a human to respond to the situation that is happening.

Explanation:

Answer:

Redox type

Explanation:

The reaction is:

2Cr +  3Fe(NO₃)₂ → 2Fe + 2Cr(NO₃)₃

2 moles of chromium can react to 3 moles of iron (II) nitrate in order to produce 2 moles of iron and 2 moles of chromium nitrate.

If we see oxidation state, we see that chromium changes from 0 to +3

Iron changed the oxidation state from +2 to 0

Remember that elements at ground state has 0, as oxidation state.

Iron is being reduced while chromium is oxidized. Then, the half reactions are:

Fe²⁺  +  2e⁻ ⇄  Fe    (Reduction)

Cr ⇄ Cr³⁺  +  3e⁻    (Oxidation)

When an element is being  reduced, while another is being oxidized, we are in prescence of a redox reaction.

The balanced chemical equation is  MgSO4 + 2NaOH -> Mg(OH)2 + Na2SO4.

In this equation, one molecule of magnesium sulfate reacts with two molecules of sodium hydroxide to produce one molecule of magnesium hydroxide and one molecule of sodium sulfate. The mole ratio between sodium sulfate and magnesium sulfate is 1:1, indicating that the stoichiometric coefficients of these compounds are the same. This balanced equation represents the conservation of mass in the reaction, ensuring that the number of atoms of each element is equal on both sides of the equation.

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Answer:

The answer is E) none of the above.

In all of the given reactions, mass and charge are conserved. The law of conservation of mass states that the mass of reactants must be equal to the mass of the products in a chemical reaction. The law of conservation of charge states that the total charge of the reactants must be equal to the total charge of the products.

In reaction A, the water molecule dissociates into a hydrogen ion (H+) and a hydroxide ion (OH-), but the total mass and charge are still conserved.

In reaction B, the reduction of CIO2 to Cl- is balanced by the oxidation of water to form OH-. The electrons and charge are conserved.

In reaction C, H2SO4 reacts with NaOH to form Na2SO4, H+ and OH-. The mass and charge are conserved.

In reaction D, ZnCl reacts with water to form ZnOH, H+ and Cl-. The mass and charge are also conserved.

5 micrograms then 5 milligrams than 5 g then 5 kg

From the calculation, the pH of the solution after dilution is 3.

The pH is the hydrogen ion concentration of the solution. Now we know that;

C1 =  0.010 m

V1 = 10.0 ml

V2 = 10.0 ml + 100.0 ml = 110 ml

C2 = ?

C1V1 = C2V2

C2 = C1V1 /V2

C2 =  0.010 m  * 10.0 ml / 110 ml

C2 = 0.00091 M

pH = -log[0.00091 M]

pH = 3

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Answer:

Without the respiratory system your blood would be useless. The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body

Explanation:

Answer:

something something answer blah blah 12

Explanation:

12

Each of these components contributes to the accurate acquisition and recording of the ECG waveform, allowing healthcare professionals to assess the heart's electrical activity.

A. Transmittance Pulse Oximeter Probe vs. Reflectance Pulse Oximeter Probe:

A transmittance pulse oximeter probe and a reflectance pulse oximeter probe are two different types of probes used in pulse oximetry, a non-invasive method for measuring oxygen saturation (SpO2) and pulse rate.

Transmittance Pulse Oximeter Probe: This type of probe consists of a light source and a photodetector placed on opposite sides of the body part (such as a finger or earlobe). The light emitted by the source passes through the tissue and is detected by the photodetector. It measures the changes in light absorption caused by oxygenated and deoxygenated blood to determine SpO2.

B. Electrocardiograph (ECG) and its Components:

An electrocardiograph (ECG) is a medical device used to record the electrical activity of the heart. It captures the electrical impulses generated by the heart during each cardiac cycle and displays them as a waveform known as an electrocardiogram.

The components of an electrocardiograph and their functions are as follows:

i. ECG Preamplifier: The ECG preamplifier is responsible for amplifying the weak electrical signals obtained from the patient's body.

ii. Right-Leg-Driven Circuit: The right-leg-driven circuit is a grounding system that helps reduce common-mode interference in the ECG signal.

iii. Defibrillator Protection Circuitry: The defibrillator protection circuitry safeguards the electrocardiograph from high-energy electrical shocks delivered during defibrillation.

iv. Lead Selector Switch: The lead selector switch allows the user to select different lead configurations for recording the ECG.

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Answer:

c. main energy level of an electron

Explanation:

An atom can be defined as the smallest unit comprising of matter that forms all chemical elements. Thus, atoms are considered to be the building blocks of matter and as such defines or determines the structure of a chemical element.

Generally, atoms are typically made up of three distinct particles and these includes; protons, neutrons and electrons.

In Chemistry, electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.

The principal quantum number, denoted by n, represents the main or overall energy level of an electron.

Basically, this property of an electron determines its energy level, as well as its distance from the nucleus of an atom of any chemical element. Also, as the distance of each orbital from the nucleus increases, the energy level increases respectively. Thus, sets of orbitals having the same principal quantum number (n) are generally referred to as an electron shell.

Answer:

C. size; direction

Explanation:

By definition, a machine is referred to any device that makes work easier. It takes force to do work, hence, work refers to the application of force over a particular distance. A machine aims at making the work easy by changing how it is done. Simple machines, which include: levers, pulleys, inclined planes etc. all carry out the same thing, which is to make work easier, by changing the size/magnitude and direction of the applied force.

A simple machine tends to change the size of the inputted force by increasing it over a shorter distance. The machine increases the force applied better than it can be done manually e.g. a plier and nutcracker increases/changes the applied force better than it can be done with bare hands.

Also, a simple machine can achieve making work easier by changing the direction at which the force is applied. The machine applies the force on the object in an opposite direction or contrary to the way it was manually applied.

Answer:

bldg licking no-good also

Answer:

Water splitting is the chemical reaction in which water is broken down into oxygen and hydrogen: 2 H2O → 2 H2 + O. Efficient and economical water splitting would be a technological breakthrough that could underpin a hydrogen economy, based on green hydrogen.

Answer: 9 moles O2

Explanation:

6 moles KClO3 X (3 moles O2/ 2 moles KClO3) = 9.0 Moles O2

Answer:

Pitch:it refers to the highest and lowness of a sound.

Wavelength: It is the distance measured from one crest to another, or from one trough to another.

Refraction of Light: The light bends as it travels from one medium to another.

Reflection of Light: It happens when light bounces back after hitting a well-polished surface.

Crest: The highest point of the wave from the center.

I hope this helps! :)

The concentration of the cu2+ in the braker will be 0.068 molar.

Concentration is known as the measure of the relative proportions of two or more quantities in a mixture of solution. Concentration determines the number of molecules are present in the solution. Concentration also determines the acidity and basicity of the solution.

       In the given condition we have 0.068 molar of copper in the solution.

Therefore,

[Cu2+] = 1 molCu(NH3)/ l x 1 mol Cu2+/ 1 moleCu(NH3)

1 molCu(NH3) gets cancelled on both the sides.

as we know, from the given condition [Cu2+] = 0.068 molar

Therefore, 0.068 = 1 mol Cu2+ / l

   Therefore, the concentration in the beaker of the copper will be 0.068molar.

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1 meter = 1000 km

2500 meter = 2500/1000 km

= 2.5 km

To determine the number of moles of zinc in a sample with a mass of 16.35 g, we need to use the molar mass of zinc. Zinc (Zn) has a molar mass of approximately 65.38 g/mol.

The number of moles can be calculated using the formula:

Number of moles = Mass of sample / Molar mass

Substituting the given values:

Number of moles = 16.35 g / 65.38 g/mol

Calculating the result: Number of moles = 0.25 mol

Therefore, there are approximately 0.25 moles of zinc in the 16.35 g sample. The molar mass is used to convert the mass of a substance to moles.

It represents the mass of one mole of a substance and is calculated by summing up the atomic masses of all the atoms in its chemical formula. In the case of zinc, the molar mass is determined by the atomic mass of zinc (65.38 g/mol). Knowing the number of moles is essential for various calculations, such as determining the stoichiometry of reactions, calculating the concentration of a substance, and understanding the relationships between reactants and products in a chemical equation.

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Iron and pure nickel can be differentiate by the it appearance as well as the density.

There are few property which can differentiate iron metal and pure nickel metal.

1)The density of iron= 7.87 \(gcm^{-3}\)

The density of pure nickel = 8.91  \(gcm^{-3}\)

2)The atomic number of iron = 26

The atomic number of nickel = 28

3)Appearance of iron = silver-grey metal

Appearance of pure nickel = silver -white metal.

Therefore, pure nickel and iron can be easily differentiate with the help of appearance and dansity.

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Answer: At a given temperature and pressure, one mole of any gas occupies the same volume. The molar volume is the volume occupied by one mole of any gas, at room temperature and pressure. The molar volume is equal to 24 dm3 (24,000 cm3).

Explanation: its the internet

answer is B value of approximation

solving

The heat of vaporization for water is 40.7 kJ/mol, which means that it takes 40.7 kJ of energy to convert 1 mole of water from a liquid to a gas phase.

The energy required to boil the water is given as 63.8 kJ.

We can set up a proportion using these values:

40.7 kJ/1 mol = 63.8 kJ/x mol

To solve for x (the number of moles of water), we can cross-multiply and solve the equation:

40.7 kJ * x mol = 63.8 kJ * 1 mol

x mol = (63.8 kJ * 1 mol) / 40.7 kJ

x mol ≈ 1.57 mol

Since we know the molar mass of water is approximately 18.015 g/mol, we can convert moles to grams:

1.57 mol * 18.015 g/mol ≈ 28.29 g

Therefore, the mass of the sample of water is approximately 28.29 grams.