Which of the following most closely states the Brønsted-Lowry definition of a base? (1 point)

A substance that gives off or shares a lone-pair of electrons during a reaction

Any substance that accepts, or receives, a hydrogen ion during a reaction

A substance that increases the concentration of hydroxide ions when dissolved in water

A substance that has a pH greater than 7 and less than 14

Answer:

The two or more important products are :-

1. 3 methlcycodexene

2. 1 methlylcohexene(2pt)

In the laboratory, hydrogen gas is used as fuel for various purposes, including heating. In order to start the heating process, it is necessary to allow the hydrogen gas to flow continuously for a while. This is because there may be air or other gases present in the hydrogen gas pipeline that can affect the heating process.

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The small amounts of spilled bases can be neutralized and made safe with the boric acid

To neutralized the small amount of the spilled base we should use a weak acid. The boric acid is the weak acid that is useful to neutralized the small amount of spilled base. After that it should be clean with a paper towel or the sponge.

The acid-base neutralization reaction is the reaction when the acid and base will combine and formed the salt and the water. The boric acid is weak acid as it does not completely dissociates to produce the hydrogen ion , H⁺ ion.

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The number of permutations of n items, where p items are identical and q items are identical, is given by:

n! / (p! q!)

This formula is known as the formula for permutations with repeated items. It takes into account the fact that some items are identical and should not be counted multiple times in a permutation.

Here, n represents the total number of items, p represents the number of identical items of one type, and q represents the number of identical items of another type. The exclamation mark (!) denotes the factorial function, which means the product of all positive integers up to that number.

The numerator represents the total number of permutations of n items, and the denominator accounts for the fact that some items are identical and should be treated as such.

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Answer:

129.50 N/kg

Explanation:

125 kg + 4.50 N

129.50 N/kg

Answer:

Temperature and Volume

Explanation:

PV = n R T

P = n R T / V      pressure depends on the temperature and volume

The pressure of a gas depends on the temperature and volume of the gas.

PV = nRT

Where

From the equation given above, we obtained the following:

PV = nRT

Divide both sides by V

P = nRT / V

R is constant and n = 1

P = T / V

Thus, we can see that the pressure (P) is dependent on the temperature (T) and the volume (V)

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The empirical formula of the hydrocarbon is C₁H₄.

To determine the empirical formula of the hydrocarbon, we need to calculate the moles of carbon and hydrogen in the given masses of carbon dioxide (\(CO_2\)) and water (\(H_2O\)).

1. Calculate the moles of \(CO_2\):

  Moles of \(CO_2\) = Mass of \(CO_2\) / Molar mass of \(CO_2\)

               = 33.01 g / 44.01 g/mol

               = 0.750 mol \(CO_2\)

2. Calculate the moles of \(H_2O\):

  Moles of \(H_2O\) = Mass of \(H_2O\) / Molar mass of \(H_2O\)

               = 27.04 g / 18.02 g/mol

               = 1.50 mol \(H_2O\)

3. Convert the moles of \(CO_2\) and \(H_2O\) to moles of carbon and hydrogen:

  Moles of C = Moles of \(CO_2\)

             = 0.750 mol C

  Moles of H = (2 * Moles of \(H_2O\))

             = (2 * 1.50 mol H)

             = 3.00 mol H

4. Find the simplest whole-number ratio of carbon to hydrogen:

  Divide the moles of carbon and hydrogen by the smallest value among them (0.750 mol):

  Moles of C in simplest ratio = 0.750 mol C / 0.750 mol = 1 mol C

  Moles of H in simplest ratio = 3.00 mol H / 0.750 mol = 4 mol H

  Therefore, the empirical formula of the hydrocarbon is \(CH_4\).

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Answer: 3:2

Explanation: (10.14÷3.38)÷(8.42÷4.21)=1.5=3/2

Answer:

Gas exchange takes place in the millions of alveoli in the lungs.

Explanation:

Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.

Answer:

5 moles of Fe(II) are required to react completely with the 5 moles of Sulphur

Explanation:

The balanced equation in this question is

Iron + Sulfur = Iron(II) Sulfide

Fe (II) + S --> Fe(II)S

Thus one mole of sulfur reacts with one mole of Fe(II)

Hence, 5 moles of Fe(II) are required to react completely with the 5 moles of Sulphur

Answer:

bioanalytical chemistry

Explanation:

The branch of chemistry that significantly deals with the testing of drugs with the utilization of complex instruments is known as Bioanalytical chemistry.

Drugs may be defined as a type of chemical substance or medicine that is remarkably utilized in order to prevent, diagnose, treat, or relieve symptoms of a disease or abnormal condition. It significantly alters the normal physiology of an organism.

Bioanalytical chemistry may be defined as a branch of chemistry that deals with the separation, detection, identification, and quantification of biological samples in different settings and conditions along with numerous parameters.

It further involves the detailed study of biomolecules like proteins and DNA and the effect of drugs and their utilization. It involves the clinical assessment of biopharmaceuticals and drugs.

Therefore, bioanalytical chemistry is the branch of chemistry that significantly deals with the testing of drugs with the utilization of complex instruments.

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The correct option is 2:all enzymes are catalysts, but not all catalysts are enzymes and 4:enzymes tend to be organic, whereas nonenzymatic catalysts tend to be inorganic compounds.

Option 2 is correct because

The two types of catalysts available are enzymes and non-enzymes.

Enzymes are biological catalysts that speed up the rate of a chemical and are a particular type of catalyst that aids in the conversion of a substrate to a product. Catalysts that are not enzymes are Non-enzymatic catalysts  Chemical compounds like transition metals, enzymes, and biological complexes can all act as non-enzymatic catalysts. They aid in the creation of the transition state, which speeds up the chemical reaction. Non-enzymatic catalysts may alter the reaction's free energy or change the reaction's pathway to enhance the rate of the reaction

Option 4is correct because

Enzymes are biological molecules made up of carbon, hydrogen, and nitrogen atoms, among other things. As a result, they are classified as organic molecules. Inorganic molecules like metal ions and acids are commonly used as non-enzymatic catalysts.

Hence options 2 and 4 are correct.

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Answer:

Option A is correct.

Explanation:

In electron dot diagram the valence electrons of an atom are shown by the dots around the symbol of an atom.

Aluminum is present in group 3A.

Its atomic number is 13.

It has three valence electrons.

Electronic configuration of Al;

Al₁₃ = 1s² 2s² 2p⁶ 3s² 3p¹

The electron dot diagram of Al is,

            °Al:

We can see three electrons in the form of dots are present around the Al.

Thus option A is correct because it has three dots around Al. All other options are incorrect because,

Option B contain six electrons around Al.

Option C also contain six electrons.

Option D contain five electrons around Al.

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Actually Welcome to the Concept of the Geography.

Surface currents in a ocean or a sea are driven by Winds.

Answer:

winds :)

Explanation:

Molecules in a perfume bottle travel from the bottle to your nose through the process of diffusion, where they move from an area of high concentration (inside the bottle) to an area of low concentration (surrounding air) until they reach your nose.

When a perfume bottle is opened, the perfume molecules escape into the surrounding air. These molecules are in constant motion due to their thermal energy. Through the process of diffusion, the perfume molecules move randomly and spread out from an area of high concentration (inside the bottle) to an area of low concentration (the air surrounding the bottle). This diffusion occurs as a result of molecular collisions and the tendency of molecules to move from regions of higher concentration to lower concentration until equilibrium is reached.

Once in the air, the perfume molecules continue to diffuse and mix with the surrounding air molecules. When you inhale, some of these perfume molecules can enter your nose and interact with olfactory receptors, triggering a sense of smell.

The mean free path refers to the average distance a molecule can travel before colliding with another molecule. In the context of perfume molecules in the air, the mean free path determines how far these molecules can move before encountering other air molecules. The mean free path depends on factors such as the size of the perfume molecules, the density of the air, and the temperature. In a perfume bottle, the mean free path of the perfume molecules may be relatively short due to the presence of other perfume molecules in close proximity.

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Answer:

D: vulcanized rubber and nylon

Explanation:

on edge! hope this helps!!~ d=(´▽｀)=b

Answer:

PFAS molecules are made up of a chain of linked carbon and fluorine atoms. Because the carbon-fluorine bond is one of the strongest, these chemicals do not degrade in the environment.

Answer:

Ni atoms are contained in 1.25gram is 1.28e22 atoms.

Explanation:

Ni atoms are contained in 1.25gram is 1.28e22 atoms.

We have a Nickel(Ni)  atom . The atomic number of Ni is 28 .It is a silvery-white metal with a slight golden tinge. Ni belongs to the transitional metal series.

The electronic configuration of Ni = Ar4d⁸35²

Nickel is slowly oxidized by air at room temperature.

Nickel is a ferromagnetic element at approximately room temperature.

To answer the problem , we first need to divide by the molar mass of Ni to get the moles of Ni. And then we will multiply by Avogadro's number to find the number of Ni atoms.

Molar mass of Ni = 58.7gm

Given mass of Ni = 1.25gm

Avogadro’s No. = 6.022 × 10²³ atom/mole

                    Moles of Ni = Given mass/Molecular mass

                                          = 1.25/58.7 = 0.0213

                    Moles of Ni = 0.0213

Now ,

       Number of Ni atom = Avogadro’s number × Moles

So that,

                No. of Ni atom = 6.022 × 10²³× 0.0213

                                            = 0.128 ×10²³  atoms

                                           = 1.28 × 10²² atoms

                                           = 1.28e22

So there are 1.28 × 10²² individual Ni atoms are contained in 1.25 grams of Ni.

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Answer:

Arsenic (As)

Explanation:

Answer:

A solid  will not take the shape of its container

Explanation:

A battery is a device that converts chemical energy into electrical energy through a process known as an electrochemical reaction.

When a battery is connected to a circuit, the electrochemical reaction causes a flow of electrons from the anode to the cathode, generating an electric current that can power a device.

The metal chosen for the anode must be capable of losing electrons easily, while the metal chosen for the cathode must be capable of accepting electrons. The choice of metals can also affect the voltage and capacity of the battery, as well as its overall efficiency.

In general, the metals used in a battery should have a large difference in their electronegativity values, which determines how easily an atom can attract electrons. Common metals used in batteries include zinc, lithium, nickel, and cadmium.

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Answer: Nerves, Brain and spinal cord

Explanation:the other choices are either part of the cardiovascular system or the respiratory system

The pure water is considered as the neutral substance as the positive and negative ions balance each other out. The correct option is D)

The H₃O⁺ is called the hydronium ion, and it will makes the acidic in nature. The OH⁻ ion  is called as the hydroxyl ion and it will makes the basic in nature. In the water, there is thein  balance between the hydroniums and the hydroxyls so they will cancel out each others' charges. Therefore the Pure water is neither the acidic in nature or the basic.

Thus, the pure water is the neutral in nature and the value on the pH scale is 7.

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The minimum amount of oxygen required for the complete combustion of 20cm³ of CO and 20cm³ of H₂ would be 20.16 cm³ at STP.

The balanced chemical equation for the combustion of CO and H2 is:

CO + 1/2O2 → CO2

H2 + 1/2O2 → H2O

From the equation, we can see that one mole of CO requires 1/2 mole of O2, while one mole of H2 requires 1/2 mole of O2.

From the balanced equation, we can see that each mole of CO requires 1/2 mole of O2, while each mole of H2 requires 1/2 mole of O2.

Therefore, we need 0.00083/2 = 0.00042 moles of O2 for the combustion of CO and the same amount for the combustion of H2.

The total amount of O2 required is the sum of the amounts needed for each reactant:

Therefore, the minimum amount of oxygen required for the complete combustion of 20 cm³ of CO and 20 cm³ of H2 is approximately 20.16 cm³ at STP.

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Answer:

The Answer would be D. N2O3

Explanation:

the Chemical bond is a Covalent bond to which the prefixes are Di and tri

The most likely identity of this element is beryllium.

Bromine and chlorine belong to the same group and therefore have similar chemical properties. The unidentified element shares many of the same physical and chemical properties as sodium and rubidium but has a lower atomic mass than either of these elements. The element with atomic number 35 is bromine.

Chlorine and bromine belong to the same group and therefore have similar properties. There are elements in nature that have not yet been created or discovered, but scientists already know what they are and can predict their properties. For example, element 125 is not observed, but if it is it will appear in a new row of the periodic table as a transition metal.

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Answer:

It belongs to the last group with all the gas whose last shell are common and they are unreactive unlike to other elements which reacts to complete there last shell with total 8 electrons . Helium and Neon have in common that they have there shell complete and they reacts very less or they don't.

Explanation:

Hope it is helpful....

Answer:18.5

Explanation:

The value of x in the figure is

An angle is a geometric figure formed by two rays or line segments that share a common endpoint. This common endpoint is called the vertex of the angle, and the two rays or line segments that form the angle are called its sides.

Angles are measured in degrees, and a full circle contains 360 degrees. Angles can be classified based on their measure. A right angle measures exactly 90 degrees, an acute angle measures less than 90 degrees, and an obtuse angle measures more than 90 degrees but less than 180 degrees.

The figure consist of angel which is an acute angle, an acute angle are angles less than 90 hence 55 is the possible value

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