At room temperature iodine is a solid and bromine is a liquid.

Describe the difference between both the arrangement and the motion of particles in a solid and a liquid.

The one that best describes the regioselectivity and stereospecificity in the Bronsted acid-catalyzed addition of water to an alkene reaction is Markovnikov orientation with syn-addition. Hence option A.

The preference of E and Y for bonds with carbon atoms an or b is referred to as the Markovnikov orientation. The example below demonstrates how, depending on the reaction conditions, a proton acid HY can add to the -bond of an unsymmetrical alkene with either a Markovnikov or an anti-Markovnikov orientation.

When hydrogen itself forms a double bond with the least-substituted carbon atom in asymmetrical alkenes or alkynes, the Markownikoff or Markovnikov rule determines the orientation of the electrophilic addition of hydrogen halides. (or triple bond). So, as conculsion, option A is correct.

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Complete question - which of the following describes correctly about the regioselectivity and stereospecificity in the bronsted acid-catalyzed addition of water to an alkene reaction?

Group of answer choices

1. markovnikov orientation with syn-addition

2. markovnikov orientation with anti-addition

3. anti-markovnikov orientation with syn-addition

4. anti-markovnikov orientation with anti-addition

5. markovnikov orientation with both syn- and anti-addition

We need to know the molecular mass in order to determine the molecular formula from the empirical formula of a compound.

Molecular formula is formed from the actual number of elements that are involved in forming the molecule whereas empirical formula is the reduced ratio of the elements present in the compound.

We can determine the empirical formula of a substance by taking the subscripts of the molecular formula and reducing it to simplest whole number ratio.

we can calculate the molecular formula as:

n = molecular mass/ empirical formula mass

where n is any positive number.

Thus, when molecular mass is known , molecular formula can be determined form the empirical formula of a compound.

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Answer:

59.92 × 10²³ atoms are in 9.95 moles of iron

1.8 ×10²² molecules are in 0.03 moles of Carbon dioxide

1.19 moles are found in 7.20 x 10^23 atoms of platinum

The mass of the vaporized liquid can be determined by measuring the mass of the container before and after the vaporization process.

The difference in mass can be used to calculate the mass of the vaporized liquid. Vaporization is a type of phase transition in which a substance in its liquid state is converted into a gaseous state. During this process, molecules in the liquid state absorb enough energy to break the bonds that hold them together, allowing them to move freely in the gas phase.For example, if the container had a mass of 100 grams before the vaporization process, and had a mass of 90 grams after the vaporization process, then the mass of the vaporized liquid would be 10 grams.

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Answer:

Mass = 0.008 g

Explanation:

Given data:

Volume of H₂ = 107 mL

Pressure = 104.8 KPa

Temperature = 30°C

Mass of H₂ present = ?

Solution:

Formula:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will convert the units of temperature, pressure and volume.

Temperature  = 30+273 = 303 K

Volume of H₂ = 107 mL (107/1000= 0.107 L)

Pressure = 104.8 KPa (104.8/101 = 1.04 atm)

by putting values,

1.04 atm ×0.107 L = n× 0.0821 atm.L/ mol.K  × 303 K

0.11 atm.L  = n×24.87 atm.L/ mol

n =  0.11 atm.L / 24.87 atm.L/ mol

n = 0.004

Mass of H₂:

Mass = number of moles × molar mass

Mass =   0.004    mol × 2 g/mol

Mass = 0.008 g

Answer:

(e) 1

Explanation:

Each atom has some energy levels and each energy level requires an electron to have certain amount of energy to reside in that energy level. Similarly, in order to excite the hydrogen atoms to a state n =6, its electrons must be provided a certain amount of energy that is constant. This energy is provided in form of photons. These photons have a constant wavelength as a result of constant energy. So, when these electrons go back to the ground state, they emit photons of same wavelength to release the energy they absorbed. Hence, only 1 wavelength is produced when atoms relax to their ground state from n = 6.

Therefore, the correct answer will be:

(e) 1  

Answer:

CH4

Explanation:

To calculate the amount of silver that will precipitate, we need to use Faraday's laws of electrolysis, which relate the substance produced or consumed in a cell to the amount of electric charge passed through it.

The first law of electrolysis states that the amount of substance produced or consumed in an electrolytic cell is proportional to the amount of electric charge passed through the cell. The proportionality constant is known as the Faraday constant, which is equal to 96,485 coulombs per mole of electrons.

The second law of electrolysis states that the amount of different substances produced or consumed in an electrolytic cell is proportional to their respective chemical equivalents.

In this problem, the substance being produced is silver, which has a chemical equivalent of 1 (i.e., one mole of electrons produces one mole of silver). The electric charge passed through the cell can be calculated as follows:

electric charge = current x time

electric charge = 5 A x 2.5 hours x 3600 s/hour

electric charge = 45,000 C

The amount of silver that will precipitate can be calculated using the first law of electrolysis and the Faraday constant:

moles of silver = electric charge / Faraday constant

moles of silver = 45,000 C / 96,485 C/mol

moles of silver = 0.467 mol

To convert moles of silver to mass, we need to know the molar mass of silver. The molar mass of silver is 107.87 g/mol. One teaspoon is approximately 5 mL.

mass of silver = moles of silver x molar mass

mass of silver = 0.467 mol x 107.87 g/mol

mass of silver = 50.4 g

number of teaspoons = mass of silver / (density of silver x volume of teaspoon)

Assuming the density of silver is 10.5 g/mL, we get:

number of teaspoons = 50.4 g / (10.5 g/mL x 5 mL)

number of teaspoons = 0.96 teaspoon

Therefore, approximately 0.96 teaspoons of silver will precipitate.

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It is true that the Maximum Contaminant Level (MCL) is the highest concentration of a contaminant that is allowable in a water system. So, option(a) is right one.

The EPA has drinking water regulations for more than 90 pollutants. MCL is the maximum contaminant level allowed in drinking water. Once the MCLG is defined, the EPA sets the applicable standards. MCL is the maximum allowable pollutant level in water supplied to all public water users.

Maximum Contaminant Level (MCL), which sets a limit value for the concentration of pollutants in drinking water. The MCL for arsenic in drinking water is 10 parts per billion (ppb). So it is clear from the above discussion that the statement is true.

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Hello, 3Coli Here!

Your Answer is Here:

I made a hypothesis, observed my experiments, used a procedure, had and prepared materials that are needed, evidence that support my thesis, and made a conclusion.  

Hopefully, this helps!

Ask your question below!

Caffeine's amount in one cup of coffee is 7.43 x 10^-4 moles.

Caffeine has the formula C8H10N4O2. If an average cup of coffee contains approximately 125 mg of caffeine, then the number of moles of caffeine in one cup can be calculated as follows: The molar mass of caffeine can be calculated as follows:3(12.01) + 10(1.01) + 4(14.01) + 2(16.00) = 194.19 g/mol. The number of moles can be calculated by dividing the mass of caffeine by its molar mass.125 mg of caffeine is equal to 0.125 g of caffeine.0.125 g / 194.19 g/mol = 6.43 x 10^-4 mol. Therefore, the amount of caffeine in one cup of coffee is 7.43 x 10^-4 moles.

High doses of caffeine have the potential to cause serious health issues and even death. Consuming caffeine may be safe for adults, but it should not be done by children. Youths and youthful grown-ups should be forewarned about over the top caffeine admission and blending caffeine in with liquor and different medications.

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Answer:

30 g

Explanation:

In order to convert from moles of CH₃COOH to grams, we need to use its molar mass:

Now we convert moles into grams:

So 0.5 moles of CH₃COOH have a mass of 30 grams.

Answer:

Tin and carbon are both in the same family on the periodic table because they have similar atomic structures. Both are in group 14 of the periodic table, which means they have four valence electrons in their outermost energy level. However, they are classified as different types of elements because of their different properties.

Tin is a metal because it is a good conductor of heat and electricity, has a shiny, metallic appearance, and is malleable and ductile, meaning it can be easily shaped and molded. Carbon, on the other hand, is a nonmetal because it is a poor conductor of heat and electricity, is not shiny, and is not malleable or ductile.

One of the main factors that determine whether an element is a metal or a nonmetal is its ability to conduct heat and electricity. Metals are generally good conductors, while nonmetals are generally poor conductors. The position of an element on the periodic table can give some indication of its conductive properties, but it is not the only factor.

The only two letters that are absent from the periodic table are "J" and "Q." Neither the names of the elements nor their symbols contain these letters. Only these two letters are not in  periodic table.

Every element has a symbol, usually one or two letters, that serve to identify it, just like your initials identify you. A tabular representation of the chemical elements is known as the periodic table, or periodic table of the (chemical) elements. It is commonly regarded as an icon of chemistry and is utilized extensively in physics, chemistry, and other sciences. The periodic law is graphically expressed in this way.

The element names and their matching symbols are listed alphabetically below. Just keep in mind that the element names (and their symbols).

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Answer:

name,atomic mass,electrons,protons,same,charge,amount,atomic mass,charge,neutrons,atomic number,atomic mass

6.15 grams of carbon dioxide is form when 8.94 g of oxygen is completely react.

Mass of any substance will be calculated from moles as :

n = W/M, where

W = required mass

M = molar mass

Given combustion reaction is:

CH₄ + 2O₂ → CO₂ + 2H₂O

Given mass of O₂ = 8.94 g

Molar mass of O₂ = 32.00 g/mole

Moles of O₂ = 8.94 / 32 = 0.279 mole

From the stoichiometry of the reaction, it is clear that:

2 moles of O₂ = produce 1 mole of CO₂

0.279 moles of O₂ = produce 1/2×0.279 = 0.139 moles of CO₂

Molar mass of CO₂ = 44 g/mole

Required mass of CO₂ will be calculated as:

W = n × M

W = 0.139 × 44 = 6.15 grams

Hence, option (2) is correct i.e. 6.15 grams.

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Answer:

Option 2/ B. 6.15 grams on edge.

Explanation:

S/o to the person above me, got it because of them.

Mass of tin = moles of tin x molar mass of tin

Mass of tin = 0.020 mol x 118.7 g/mol

Mass of tin = 2.37 g

Therefore, the mass of tin in the chemical reaction is 2.37 g.

If tin is heated, it cracks. This is caused by crystals rubbing against each other. This characteristic crackle is heard if a piece of tin is simply bent. Tin is very malleable and ductile.

Some properties of tin is that it amphoteric. On reacting with both strong bases and strong acids with the evolution of hydrogen occurs. With sodium hydroxide solution, tin forms Na2[Sn(OH)6]. The reaction with acids is slow in the absence of oxygen.

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The hydrogen bond in water become weaker when it boils. As the intermolecular force decreases, the liquid water starts convert to its vapor phase.

Hydrogen bonding is a special type of intermolecular force acting between two molecules with hydrogen and the one with an electronegative element such as oxygen, nitrogen, fluorine etc.

Boiling point of  a substance is the temperature at which it converts from liquid state to vapor state. To achieve this, the intermolecular force have to weaken. Thus, energy need to applied to the system.

When water molecules gets enough energy to weaken the intermolecular force like hydrogen bonding, it starts to boil and converts to its vapor state. Hence, option D  is correct.

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Answer:18.015 g

Explanation:

Water has a molar mass of 18.015 g/mol . This means that one mole of water molecules has a mass of 18.015 g . So, to sum this up, 6.022⋅1023 molecules of water will amount to 1 mole of water, which in turn will have a mass of 18.015 g

The reaction where change in the free energy under standard conditions is 25.9 kj/mol, Then this reaction is not spontaneous as under the standard conditions, ∆G°>0. So, option(d) is right one.

This reaction is non- spontaneous as ∆G°>0, We know that, For a spontaneous reaction the free energy change must be negative, i.e ∆G= (-) Ve. If the free energy change is positive, ∆G°= (+) Ve, then the reaction must be non-spontaneous reaction. Simply, we can say that

Here ∆G°= 55 kj/mol that means it is a positive value and greater than zero so it satisfy the (1) condition ∆G°>0 thus it is a non-spontaneous reaction at standard condition.

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Complete question:

the change in the free energy under standard conditions is 25.9 kj/mol. is this reaction spontaneous as written under standard conditions?

a) Yes, ∆G°<0

b) No, ∆G°<0

c) Yes, ∆G°>0

d) No, ∆G°>0

The concentration of silver ion after the reaction of 300 mL of a .2 molar solution of AgNO3 with 100 mL of a .05 molar solution of CaCl2 has gone to completion is 0.15 molar.

The equation for the reaction is: 2AgNO3 + CaCl2 → 2AgCl + Ca(NO3)2.

The molar concentration of the AgNO3 solution is 0.2 molar. When 300 mL of this solution is added to 100 mL of a 0.05 molar solution of CaCl2, the moles of AgNO3 will be 0.6 and the moles of CaCl2 will be 0.05.

When the reaction goes to completion, 0.6 moles of AgNO3 will produce 0.6 moles of AgCl. Therefore, the concentration of silver ions will be 0.6/400 mL, or 0.15 molar.

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2,3,4-trihydroxybutanal is an aldose carbohydrate with 4 carbon atoms and 3 hydroxyl groups (C4H8O4). The hydroxyl groups at positions 2, 3, and 4 form an aldehyde group on carbon 1. In 2,3,4-trihydroxybutanal, the hydroxyl groups are positioned in a way that two of them are equatorial and one is axial.

The axial hydroxyl can be in either R or S configuration, forming two enantiomers. If we switch the configuration of the hydroxyl at position 4, another pair of enantiomers is formed. Each of the pairs of enantiomers has a diastereomer that results from the different arrangement of the equatorial and axial hydroxyl groups.

Therefore, there are a total of 8 stereoisomers of 2,3,4-trihydroxybutanal as shown in the figure below:

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Answer:

The electron configuration for the first row transition metals consists of 4s and 3d subshells with an argon (noble gas) core. This only applies to the first row transition metals, adjustments will be necessary when writing the electron configuration for the other rows of transition metals.

Explanation:

Answer: 32.9345 cm^3

Explanation:

The volume of the water that must be added to exactly fill the container with the lead sphere sitting at the bottom of the container will be 3.222 cubic cm.

Volume is defined as the space occupied by any solid object in the three-Dimensions. For the sphere, the radius will be the parameter to calculate the volume. For a cylindrical body, the height and the radius are required to calculate the volume.

Given that A glass container has a volume of 42.122cm³ A lead sphere of radius 2.102 cm is placed inside the glass container.

To calculate the volume of the water calculate the volume of a lead sphere and subtract it from the volume of the cylindrical container.

Volume of lead sphere = ( 4 / 3 )πr³

Volume of lead sphere = ( 4 / 3 ) x π x ( 2.102)³

Volume of lead sphere = 38.90 cubic cm

Amount of water to fill in the container:-

= ( Volume of container - Volume of the lead sphere )

= 42.122 - 38.90

= 3.222 cubic cm

Therefore, the volume of the water that can be filled in the container will be 3.22 cubic cm.

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Answer:

d. melting

As heat enters the water the particles move much faster, bumping into each other. Therefore, more heat means more energy!

Hopesthis helps!

Guidelines for accidental contact is the section in which each type of information can be found on a safety data sheet.

The safety data sheet (SDS) contains details about each chemical's characteristics, potential physical, mental, and environmental health risks, counter measures, and safety instructions for handling, storing, and transporting the chemical.

Guidelines for accidental contact: First aid measures; chemical name; identification of potential hazards; compatibility; handling; PPE; and exposure controls. Hazards and suggestions for chemicals are:

Chemical hazards are various chemical chemicals that can be harmful to human health. The First-Aid Measures are a set of suggestions on how to lessen the consequences brought on by unintentional exposure to a certain chemical threat. Personal protection equipment (PPE) is a category of specially made equipment that shields an employer from workplace safety threats.

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The complete question is

Identify the section in which each type of information can be found on a Safety Data Sheet.

recommendations in case of accidental contact with the chemical Choose...

chemical name and formula Choose...

possible dangers and health effects Choose...

incompatibility or reactivity with other chemicals Choose...

recommended personal protective equipment (PPE) Choose...

Answer:

ones that can be mixed together

Explanation:

like water or ethanol

Answer:

miscible liquids are harder to separate as they dissolve in each other

Explanation:

hope this helps!

In the reaction, H₂PO₄⁻(aq) + H₂O (l) ⇔ HPO₄⁻(aq) + H₃O+ (aq), H₂PO₄⁻ is the conjugate acid and HPO₄² is the conjugate base.

According to a more detailed definition, a conjugate base is the base member, X-, of two compounds that transform into one another by gaining or losing a proton. The conjugate base has the ability to gain or lose a proton during a chemical reaction.

The formula for the conjugate base is the formula for the acid minus one hydrogen. The reacting base transforms into its conjugate acid. The formula of the conjugate acid is the formula of the base plus one hydrogen ion.

When an acid and base undergo a Bronsted-Lowry reaction, the original acid loses its proton and transforms into a conjugate base. The original base similarly takes on a proton and changes into a conjugate acid. There is a conjugate base for every acid and vice versa for every base.

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Answer:

\(C_{9.042}H_{17.958}\)

Explanation:

(This exercise has been written in Spanish and for that reason explanation will be held in such language)

Por la definición del Número de Avogadro, un mol del compuesto contiene \(6.022 \times 10^{23}\) moléculas. La masa de un mol se determina mediante regla de tres simple:

\(x = \frac{6.022\times 10^{23}\,molecules}{1\,molecule} \times (2.1\times 10^{-22}\,g)\)

\(x = 126.462\,g\)

Las participaciones másicas del carbono y el hidrógeno son, respectivamente:

\(m_{C} = 0.858\cdot (126.462\,g)\)

\(m_{C} = 108.504\,g\)

\(m_{H} = 126.462\,g - 108.504\,g\)

\(m_{H} = 17.958\,g\)

Ahora, el número de moles de cada elemento es calculado a continuación:

\(n_{C} = \frac{108.504\,g}{12\,\frac{g}{mol} }\)

\(n_{C} = 9.042\,mol\)

\(n_{H} = \frac{17.958\,g}{1\,\frac{g}{mol} }\)

\(n_{H} = 17.958\,mol\)

La fórmula molecular del hidrocarburo es:

\(C_{9.042}H_{17.958}\)

To determine the boiling point of a solution, we need additional information such as the molar mass of the solute (glucose), the boiling point elevation constant, and the molality of the solution. Without these values, we cannot calculate the exact boiling point of the solution.

The boiling point of a solution is influenced by the presence of solutes, which causes an increase in boiling point compared to the pure solvent. This phenomenon is known as boiling point elevation. The extent of boiling point elevation depends on the molality of the solution and the boiling point elevation constant, which is specific to the solvent.

If you provide the molar mass of glucose, the boiling point elevation constant, and the molality of the solution, I can help you calculate the boiling point of the solution using the equation:

Where:

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