How Many Grams Of Ch3ohch3oh Must Be Added To Water To Prepare 310 Ml Of A Solution That Is 4.0 M Ch3ohch3oh (2024)

Answer: the answer would be C

Explanation:

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Answer: Atom

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The solution having PH less than 7 is slightly acidic, PH equals to 7 is considered to be neutral and the one more than 7 is basic.

What is PH and what is the contrast in the PH of the solution have great PH and low PH?PH is the hydrogen ion concentration in the solution determining the acidity and basicity of the solution.Here the question is asked of the solution that has a PH less than seven, greater than seven and equal to seven.So the solution having PH more than 7 is basic , the solution having PH equals to 7 is considered to be neutral and the solution having PH less than 7 is considered to be acidic.When the PH of the solution is 2 or 3 then the solution is considered to be highly acidic.When the PH of the solution is exactly and precisely 7 then the solution is neutral.

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1:1 is the molar ratio of acid to base for the neutralization reaction between HCl and NaOH.

HCl + NaOH → NaCl + H₂O

A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water. The neutralization of a strong acid and strong base has a pH equal to 7.

Neutralization is the reaction of an acid and a base, which forms water and a salt.

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Balance the neutralization reaction of phophoric acid with magneium hydroxide is 2 H₃PO₄ + 3 Mg(OH)2 ⇒ Mg₃(PO₄)₂ + 6H₂O

This reaction is known as a neutralization reaction because the acid and base react to form a salt and water by-products. Phosphoric acid reacts with magnesium hydroxide to produce Magnesium phosphate and water.

A chemical reaction is balanced when there are equal amounts of each element on both sides of the equation.

Therefore, balance the neutralization reaction of phosphoric acid with magnesium hydroxide is 2 H₃PO₄ + 3 Mg(OH)2 ⇒ Mg₃(PO₄)₂ + 6H₂O

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i. Percentage Recovery in the first crop is: -

We know that,

Percent recovery = (amount of substance isolated at the first crop ÷ amount of substance originally taken) × 100

Thus,

Percent Recovery in the first crop = (10.2/17.5) * 100 = 58.28%

ii. Total Percentage Recovery is given by: -

Percent recovery = (amount of substance isolated at the first and second crop ÷ amount of substance originally taken) × 100

Thus,

Total Percent Recovery = {(10.2+3.2)/17.5} * 100 = 76.57%

What is Percent Recovery?

The percentage of an original substance that remains after a chemical reaction is finished is calculated using the term "percent recovery." These primarily consist of purifying processes. It also determines how effective they are.

Percent recovery calculation is usually applicable to those reactions in which the identification of the substance to be purified remains the same before and after the reaction.

In organic chemistry, certain elements are purified by conducting the process of recrystallization. A specific element or chemical that needs to be purified is combined with a heated solvent in this method. Later, after cooling the solution, the element or compound precipitates.

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11.1 moles of CO2 are produced when 5.55 moles of ethane is burned in excess of oxygen

What is combustion reaction?

Burning, also known as combustion, is a high-temperature exothermic redox chemical process that occurs when an oxidant, typically atmospheric oxygen, reacts with a fuel (the reductant) to generate oxidized, frequently gaseous products in a mixture known as smoke. Fire does not always arise from combustion because a flame can only be seen when the chemicals being burned evaporate, but when it does, the flame serves as a distinctive indicator of the reaction.

The balanced equation for combustion of ethane is

2C2H6(g)+7O2(g)⟶4CO2(g)+6H2O(g)

According to this reaction it is understood that,

2 moles of carbon ethane produces 4 moles of CO2

So, 5.55 moles of ethane produces x moles of CO2

x= (5.55* 4) / 2= 11.1 moles

Hence, 11.1 moles of CO2 are produced when 5.55 moles of ethane is burned in excess of oxygen.

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This same rate of hydrogen effusion will be 4:1 of the increase in oxygen effusion.

What is a hydrogen example?

Methane, commonly known as natural gas, can be replaced with hydrogen, a clean fuel. It is the most prevalent chemical element and is thought to make about 75% of the universe's mass. Hydrogen atoms are abundant in water, plants, creatures, and, of course, human beings on this planet. the symbol 1H for the most prevalent hydrogen isotope.

How is hydrogen used?

Industry currently uses hydrogen mostly for the manufacturing of steel, ammonia, methanol, and refined oil. Since almost all of that hydrogen is produced using fossil fuels, clean hydrogen offers a substantial opportunity to reduce emissions.

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Then attraction holds individual covalent molecules together as a solid are the force that hold the atom together if the each atom nucleus for the shared pair of electrons. the covalent compounds have very low melting point and boiling point.

The covalent bond form between the atoms by the sharing of electron. when there is no much difference in electronegativity of the atoms then the electrons are equally shared between two atoms. the mutual sharing of electrons formed covalent bond . the compound is called as covalent compound or molecules. the molecules held by very weak intermolecular forces and it is very easy to break them . so, they have low melting point and boiling point.

Thus, Then attraction holds individual covalent molecules together as a solid are the force that hold the atom together if the each atom nucleus for the shared pair of electrons .the covalent compounds have very low melting point and boiling point.

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The percent of a present amount of radioactive radium after 100 years is 95.76%

Radium:

Radium is a chemical element with the symbol Ra. It is the sixth element in the Group 2 of the periodic table. Pure radium is silvery-white in color, but it combines with nitrogen readily on exposure to air and forms a black surface layer of radium nitride.

Here we have to find the percent of the present amount of radioactive radium remains after 100 years.

As we know:

y = a[tex]e^{-bt}[/tex]

y = a (at t =0)

as half-life:

0.5a = a[tex]e^{1600b}[/tex]

ln 0.5 = -1699b

b = -log 0.5/ 1600

Now model is:

y = a[tex]e^{log 0.5/1600 t}[/tex][tex]e^{log 0.5 / 1600 t}[/tex]

at t = 100

y = 0.95768

So there will be 95.76% radioactive radium after 100 years.

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Perchloric acid monohydrate is added to distilled water to give a concentration of 6.2 mg/l. if water is supplied at a rate of 8 mgal/day, 301 lb pounds of perchloric acid monohydrate will be required per day.

What is perchloric acid used for?

Perchloric acid is used to split potassium from sodium, and in lots of laboratory assessments and processes. Uses for the salts of perchloric acid consist of explosives and plating metals. Perchloric acid may also explode, and it decomposes on heating generating poisonous and corrosive fumes.

Is perchloric acid safe?

Perchloric acid is one of the most powerful mineral acids acknowledged and therefore may be very unfavourable to the skin, eyes and mucus membranes on contact. Inhalation of the vapours also can result in extreme harm to the respiration system.

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The liquid shown in 'b' need more thermal energy to change to a gas.

What is Thermal energy?

Thermal energy is defined as internal energy which is present in a system in state of the thermodynamic equilibrium depending on its temperature. Thermal energy can not be converted into useful work as much easily as the system energy which are not in states of the thermodynamic equilibrium.

As we can see that at same temperature in image 'a' the particle have high kinetic energy than the molecules of image 'b'. This can be shown that the boiling point of image 'a' is lower than the image 'b'. Therefore, at lower temperature it boils faster than the liquid 'b'. Thus we can say that liquid 'a' has less thermal energy than 'b'.

Thus, we concluded that the liquid shown in 'b' need more thermal energy to change to a gas.

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True. Reaction mechanisms usually involve only unimolecular and/or bimolecular elementary steps because in higher reactions all three or more reactants have to collide at the same time which is most likely to not happen.

What are unimolecular and bimolecular reactions?

Unimolecular reactions are mostly of first order. It occurs when a molecule rearranges itself to give one or more products in a reaction. For example, in radioactive decay, some particles are emitted from the atom giving different atoms in the reaction. In bimolecular reaction, two of the molecules collide with each other to give one or more products. Mostly occur in organic reactions for example, nucleophilic substitution reaction.

In higher reactions such as termolecular reactions unlike unimolecular and bimolecular reactions, all three or more reactants should collide with same energy and proper orientation to give products which is most likely to not take place.

Therefore, reaction mechanisms usually involve only unimolecular and/or bimolecular elementary steps due to lesser collision compared to termolecular reactions.

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The number of moles of Benzyl alcohol is 0.115 moles.

Number of moles can be also told in terms of Avogadro's number with is 6.023 × [tex]10^{23}[/tex]. It can be calculated for atoms, molecules, ions or others as well. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance. The concept of the mole helps to put quantitative information about what happens in a chemical equation on a macroscopic level. So it is used widely.

Molecular mass is nothing but the sum of atomic mass of all the element present in the molecule. In the above given question we have to calculate the number of moles of the molecule by using the given weight. To do so we use the below formula;

Number of moles = given weight

Molecular mass

⇒ 12.50 = 0.115 moles

108.14

Therefore the number of moles in 12.50 g of benzene C2H5OH is 0.115 moles

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The identity of the an unknown diatomic gas that has a density of 3.164 g/l at stp is chlorine (Cl) with 35.44 g/mol molar mass

To determine the identity of a diatomic gas, determine the mass of one mole of gas.

from the formula

mass = density x volume

At standard temperature and pressure (STP), 1 mole of gas occupies a volume of 22.4 L.

Mass of diatomic gas = 3.164 × 22.4

Mass of 1 mole of diatomic gas = 70.8736 g

Then determine the atomic mass of the gas

Since the gas is a diatomic gas,

atomic mass of gas = 70.8736/2

Atomic mass of gas = 35.4368 g/mol

Atomic mass of gas ≅ 35.44 g/mol

This is fairly close to the atomic mass of chlorine (At. mass for Cl = 35.453 g/mol).

Therefore, the identity of the diatomic gas chlorine (Cl)

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value for δu is 20 kj when a system that is absorbing 30 kj of heat and is doing 10 kj work done.

Data given that work done by the system and heat is absorbed by the system.

Therefore,

q=30 kj

w=−10kJ

Now from first law of thermodynamics,

ΔU=q+w

=ΔU=30+(−10)=20kJ

=Uf​−Ui​=6⇒Uf​=(Ui​+20)

δu=20 kj

First Law of Thermodynamics: The change in total internal energy of a particular system between two states is described by the first law of thermodynamics. The first law of thermodynamics states that when heat is introduced to a system or when work is done, the total internal energy will change.

A positive result when calculating work done indicates that the system releases energy into the environment while performing work. If the value is negative, the environment's work on the system has contributed energy to it.

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A. Temperature leads to weathering of rocks as rocks expand and contract when they are heated and cooled which causes them to break; option B is correct.

B. The part of the Earth that experiences physical weathering is the crust; option D is correct.

C. The last stage of physical weathering in rocks is sand; option A is correct

D. A crack must be present on a rock that undergoes frost wedging; option B is correct.

What is physical weathering?

Physical weathering is a form of rock weathering in which large rocks are broken down into smaller rock particles without a change occurring in the chemical composition of the rocks.

Agents of physical weathering include wind, water, ice, and heat.

Some forms of physical weathering include:

Abrasion:Frost WedgingRoot Wedging:Salt Crystal GrowthSheeting:Thermal Expansion

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The reasonable approach during analytic procedures of audit is identifying reasonable assurance for unexpected differences before talking to client management

Audit is an external help identifying areas where books or accounting practices are no longer in compliance with new Internal Revenue Service regulations.

An external audit can also pinpoint where your compliance efforts may be lacking. Since an external auditor has no reason to be anything but honest about the status of your financial compliance, you can rely on the independence of the investigation and on the recommendations being made.

Internal and external financial statements will carry more weight if they’ve been vetted by an external auditor. For family businesses, closely held corporations and non-profits, these audits provide common ground for stakeholders to properly assess the financial health of the organization.

For publicly traded companies, external audits offer an unbiased glimpse into the accounting practices of the organization.

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Before knowing, what is energy of electron, we should know how is energy added to electron if it goes to higher levels.

Atom jumps from a ground state to any excited state by taking the energy from its surroundings and this process is called absorption.

Electron absorbs the energy and jumps to the higher energy level.

Whereas in the reverse process, emission happens i.e. the electron returns to the ground state by releasing the extra energy which was absorbed while excitation.

Electron present in the first energy level, it must have exactly -13.6 eV of energy.

The formula to find out the energy of electron at nth orbit is mentioned in the figure.

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No, work is not done whenever you hold a heavy object for a long time

What is work done ?

The result of a force's displacement and its component of force exerted by the object in the direction of displacement is what is known as the force's work. When we push a block with some force, the body moves quickly and work is completed.

No work, as that term is used here, is done until the object is moved in some way and a component of the force travels along the path that the object is moved. Because there is no displacement when holding a heavy object still, energy is not transferred to it.

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oose each ethanol functional group in the preceding molecule that, when subjected to pcl3 or pbr3, would result in the formation of an alkyl halide at position R3COH.

What is molecule explain?

A is the smallest component of a chemical that keeps its content and properties. It is made up of two or even more atoms that are joined together by chemical bonds. Chemistry is built on molecules. The chemical name and a subscript indicating the number many atoms are used to identify molecules.

Is water a molecule?

Molecules are created when atoms come together. One hydro (H) ions one and oxygen (O) atom make up the three atoms that make up a water molecule. Because of this, water is occasionally abbreviated as H2O. There are thousands of water molecules in a single drop of liquid.

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A medical professional takes a little sample of anything from your body for a bacteria culture test.

What is bacteria culture test?

The sample area is determined by your symptoms and the infection that your doctor feels you may have. The supplier delivers the sample to a lab. In the lab, specialists use unique methods to purposefully promote any microorganisms in the sample to grow and proliferate.

When the sample arrives in the lab, the personnel there uses particular procedures to encourage the cells to divide and proliferate.

This provides specialists with a sufficient number of bacterial cells for microscopic examination or testing for particular chemical reactions, including susceptibility to different antibiotics. Depending on the type of bacteria, the process can take one to five days.

The lab can confirm an infection if the sample has enough bacteria in it. The lab will inform the medical professional of the type(s) of bacteria that were discovered.

Therefore, A medical professional takes a little sample of anything from your body for a bacteria culture test.

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10.45 kJ heat would be needed to change the temperature of 100g water from 10°C to 50°C.

Temperature is the degree of hotness or coldness expressed in phrases of any of several scales, inclusive of Fahrenheit and Celsius. Temperature shows the direction in which warmness electricity will spontaneously waft i.e., from a hotter body to a colder frame.

calculation:-

Heat = ms× change in temperature.

= 100 × 4.2 × 50-10

= 100 × 4.2 × 40

= 10.45 J

The heat of an item is the whole energy of all of the molecular movement inside that item. Temperature is the degree of the thermal power or common heat of the molecules in a substance.

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Acids give hydrogen ions (H+) to water when they are dissolved in it. The hydrogen atoms that make up hydrogen ions have just one proton left after losing an electron, giving them a positive electrical charge.

What transpires to strong bases and acids in water?

Acids and bases dissolve in water and inhibit water dissociation by increasing the concentration of either protons or hydroxide ions, one of the byproducts of water self-ionization.

In an aqueous solution, strong acids and bases are completely ionised. In an aqueous solution, weak acids and bases ionise to a lesser extent. The acidity or basicity of their aqueous solutions can be changed by the salts of weak acids or bases.

Water has the capacity to combine to function as both an acid and a base simultaneously.

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The atomic mass of the element is the weighted average of the atomic masses of the naturally occurring isotopes of an element.

The atomic mass

The atomic mass (ma) of a chemical element is the mass of an atom at rest, generally expressed in atomic mass units. Atomic mass is often synonymous with relative atomic mass, average atomic mass, and atomic weight. However, there is a slight difference in that the values can be either weighted averages of the masses of all isotopes of an element, or the masses of just one isotope. As is the case for an element that has only one dominant isotope, the atomic mass value of the very abundant isotope can be almost the same as the atomic weight value of that element. As elements whose isotopes are generally more than one, the difference in the value of the atomic mass with the atomic weight can be up to more than half a mass unit (for example chlorine). The atomic mass of a rare isotope can differ from the standard atomic weight by several mass units.

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The conditions that will hydrolyze the nitrile to the carboxylic acid is the both acid or base in water and the heat.

Nitrile to carboxylic acid :

nitrile get hydrolysis with water and form carboxylic acid:

CH₃CN + H₂O -----> CH₃CONH₂ ----> CH₃COONH₄ + H⁺ ----> CH₃COOH

Nitrile hydrolysis by acid catalyst :

CH₃CN + H₂O + HCl ----> CH₃COOH + NH₄Cl

Nitrile hydrolysis by base catalyst :

CH₃CN + H₂O + NaOH ---> CH₃COONa⁻ + NH₃ + HCl --> CH₃COOH

Thus, The conditions that will hydrolyze the nitrile to the carboxylic acid is the both acid or base in water and the heat.

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Answer:

Pressure = 83,000 Pascals

Explanation:

Force exerted by Earth's atmosphere = 124,500 N

Area of kitchen table on which force is exerted = 1.5 m²

Formula:

[tex] \boxed{ \rm Pressure= \dfrac{Force}{Are}}[/tex]

By substituting values in the formula we get:

[tex] \rm \implies Pressure= \dfrac{124500}{1.5} \\ \\ \rm \implies Pressure=83000 \: Pa[/tex]

Active series ions with the highest reactivity among metals.

What is an activity series?

The simplicity of chemical reactions is the main difference between metals. The most active metals in terms of reactivity are those in the lower left corner of the periodic table. For example, water reacts with lithium, sodium and potassium. However, as you move down this pillar, the more metallic the elements become, the more reactive they become, thus accelerating the rate of this reaction.

The order in which metals are arranged in descending order of reactivity is called the reaction sequence or activity sequence of metals.

The list of active or electromotive series metals is arranged in order of increasing reactivity with hydrogen ion sources such as water and acids.

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The molarity of the solution if 1.600 moles of a solute are dissolved in enough water to make 400.0 ml is 4M

Before we calculate the molarity we should know that molarity is a unit of concentration measuring the number of moles of a solute per liter of solution.

The molarity can be calculated as follows:

as we know, 400 mL = 0.4L

Molarity = moles/volume

molarity = 1.600 moles/ 0.4L

Molarity = 4M

so,The molarity of the solution if 1.600 moles of a solute are dissolved in enough water to make 400.0 ml is 4M

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Because the hydrocarbons in petroleum are components with equal boiling temperatures, petroleum may be divided by distillation.

Why is distillation a useful method for separating various hydrocarbons?

Crude oil is divided through fractional distillation into simpler, more usable combinations. Because different hydrocarbons have different boiling points, this approach is applicable.

How is petroleum distinguished from gasoline?

Fractional distillation: This process is used to separate gasoline from crude oil. On the basis of the different boiling points, it is used to separate the components of miscible liquids.

Crude oil can be divided by distillation into groups of hydrocarbons that boil between two predetermined boiling points since it is a mixture of hydrocarbons with varying boiling points. There are two distinct forms of distillation:

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