A solution is made by mixing 35 g of benzene and 126 g of acetyl bromide.

Calculate the mole fraction of benzene in this solution. Round your answer to 2 significant digits.

As no visible reaction occurs, then the experiment shows that copper does not react with dilute HCl, confirming that copper is not reactive with HCl under normal conditions.

To demonstrate that copper does not react with dilute hydrochloric acid (HCl), you can carry out the following experiment:

Materials:

Procedure:

Conclusion:

If no visible reaction occurs, then the experiment shows that copper does not react with dilute HCl, confirming that copper is not reactive with HCl under normal conditions.

Learn more about reaction of copper here: https://brainly.com/question/27172907

#SPJ1

Answer:

the molarity of the solution would be 10.0 M if 80.0 grams of NaOH were added to 200 milliliters of water.

Explanation:

To calculate the molarity of a solution, we can use the formula:

Molarity = moles of solute / volume of solution in liters

First, we need to calculate the moles of sodium hydroxide (NaOH) in the given mass:

moles NaOH = mass of NaOH / molar mass of NaOH

The molar mass of NaOH is 40.00 g/mol (the atomic mass of Na is 22.99 g/mol, the atomic mass of O is 15.99 g/mol, and the atomic mass of H is 1.01 g/mol).

For 52 g NaOH:

moles NaOH = 52 g / 40.00 g/mol = 1.30 mol

Now, we can calculate the molarity of the solution:

Molarity = moles NaOH / volume of solution in liters

We don't know the volume of the solution for the first case, so we cannot calculate the molarity.

For the second case, we have 80.0 g NaOH and 200 mL of water. We need to convert the volume to liters:

200 mL = 0.200 L

Now, we can calculate the moles of NaOH:

moles NaOH = 80.0 g / 40.00 g/mol = 2.00 mol

Finally, we can calculate the molarity of the solution:

Molarity = moles NaOH / volume of solution in liters

Molarity = 2.00 mol / 0.200 L

Molarity = 10.0 M

Therefore, the molarity of the solution would be 10.0 M if 80.0 grams of NaOH were added to 200 milliliters of water.

In one mole of Mg(OH)2, there are 2 moles of OH. Therefore, in 1.20 moles of Mg(OH)2, there are: 2 moles of OH/mol of Mg(OH)2 x 1.20 mol of Mg(OH)2 = 2.4 moles of OH.

Mole measures the quantity of chemicals, whereas molarity measures the concentration of those substances. The amount of chemicals in a combination can be estimated by looking at its molarity. One volume of a solvent is equal to the number of moles of a material. Molarity is not a unit, although a mole is.

Molarity (M) is calculated by dividing the volume of the solution (V) in litres by the number of moles of solute (n). Not moles of solute per litre of solvent, but rather moles of solute per litre of solution, is a crucial distinction to make when defining molarity.

To know more about mole visit:-

https://brainly.com/question/20486415?

#SPJ1

The frequency is used to measure the number of waves that pass through a fixed point in a certain amount of time. That is option B.

A wave is defined as a disturbance in a medium that travel from a point to another in an organised fashion.

There are different properties of a wave that include the following:

The frequency of a wave is defined as the property of a wave that shows the the number of crests (high points) of waves that pass the fixed point in a given number of time.

Therefore, frequency of a wave measures the number of waves that pass through a fixed point in a certain amount of time.

Learn more about frequency here:

https://brainly.com/question/27151918

#SPJ1

Wave frequency measures the waves that pass through a fixed point in a certain amount of time (option B)

Frequency of a wave is defined as the number of complete oscillations, vibrations or waves made in 1 second. This is written formula:

Frequency (f) = Number of oscillation (n) / time (s)

f = n / t

The SI unit of wave frequency is Hertz.

Wave frequency is related to speed of wave and wavelength according to the following formula:

Velocity (v) = wavelength (λ) × frequency (f)

v = λf

Wave frequency is also related to the period of a wave according to the following formula:

Frequency (f) = 1 / Period (T)

f = 1 / T

With the above information about wave frequency, we can conclude that the correct answer to the question is option B

Learn more about frequency:

https://brainly.com/question/18125929

#SPJ1

The enthalpy of formation of solid copper metal and and hydrogen gas is zero. The enthalpy of formation of water is - 286 KJ. From this, the enthalpy of formation of solid CuO is - -156.3 KJ.

The heat energy absorbed or evolved by a reaction is called the reaction enthalpy. The enthalpy required for the formation of one mole of a compound from its constituent elements is called enthalpy of formation.

The reaction enthalpy for a reaction is:

∑ ΔH (products) - ∑ ΔH (reactants)

given ΔHrxn = -129.7 KJ.

ΔH (H₂O (l)) +ΔH (Cu((s))  - ∑ ΔH (CuO) + ΔH (H₂) = -129.7 KJ

From the standard data of  enthalpy of formation,

ΔH (H₂O (l)) = - 286 KJ

ΔH (Cu((s)) = 0

ΔH (H₂) = 0.

Then,

ΔH (H₂O (l))  - ΔH (CuO) = -129.7 KJ.

- 286 KJ - ΔH (CuO) = - 129.7 KJ.

ΔH (CuO) = - 286 KJ - (-129.7 KJ ) = -156.3 KJ.

Therefore, the enthalpy of formation of CuO (s) is - 156.3 KJ.

Find more on reaction enthalpy:

https://brainly.com/question/1657608

#SPJ1

In a sublevel for which l=0, there is 1 orbital, and the maximum number of electrons that can be accommodated is 2.

Orbital refers to the paths that atoms, molecules, and other particles take as they move around their nucleus due to the attraction of their electrons. As electrons move around their atom, they form an orbital which is the path that the electrons take in order to complete a full orbit. The shape and size of the orbital will depend on the distance between the electron and the nucleus, as well as the amount of energy being supplied to the electrons. Depending on the energy and distance, electrons can form different types of orbitals, such as s, p, d, and f orbitals.

In a principle energy level for which n=3, the maximum number of electrons that can be accommodated is 18.
Given the appropriate values of n and l for an orbital of 3p:n= 3 and l= 1.

To learn more about orbital
https://brainly.com/question/20319149
#SPJ1

IV. Acetylene is a hydrocarbon molecule composed of two carbon atoms and two hydrogen atoms. It is a flammable gas, and when ignited with a spark, it produces an extremely hot flame.

Molecule is a unit of matter composed of two or more atoms bonded together. Atoms are the basic building blocks of all matter, and molecules are collections of atoms. Molecules can range in size from diatomic molecules composed of two atoms, to large macromolecules made up of hundreds of atoms. Molecules can vary in shape and complexity, and can consist of a variety of different elements. Molecules can be found in all physical states, including solids, liquids, and gases.

Ethylene is a hydrocarbon molecule composed of two carbon atoms and four hydrogen atoms. It is a gas with a sweet odor and is found naturally in plants, fruits, and vegetables.

I.

a. Cr2O3 (Chromium (III) oxide);

b. NH4H2PO4 (Ammonium dihydrogen phosphate);

c. CaSO4 (Calcium sulfate).

II.

a. Iron(II) Chloride

b. Barium Hydroxide

c. Lithium Cyanide

d. Lead(II) Chloride

To learn more about molecule

https://brainly.com/question/26388921

#SPJ1

We are aware that the chemical formula for chloric acid is (ClO3) nitrous acid, HNO2HNO2, carbonic acid, perchloric acid, and acetic acid (HClO4). HCl is another name for hydrochloric acid.

The term hydroiodic acid, or hydriodic acid, refers to an aqueous solution of hydrogen iodide (HI). In an aqueous solution, it is a strong acid that totally ionizes. It lacks color. A HI of 48 to 57 percent is typical for concentrated solutions.

A strong acid is perchloric acid (HClO4). A strong acid, according to the theories, is one that entirely ionizes or dissolves easily in water. Because it entirely dissolves in water as well, perchloric acid (HClO4) is a potent acid.

To know more about Chloric acid visit :-

https://brainly.com/question/3520712

#SPJ1

Answer: Your welcome!

Explanation:

(a) The amount of oxygen gas required to react with 7.98 liters of hydrogen gas at STP in the synthesis of water is 7.98 liters. This is because the balanced chemical equation for the synthesis of water is 2H2 + O2 → 2H2O. Since the moles of hydrogen gas are equal to the moles of oxygen gas, the volume of oxygen gas required would be equal to the volume of hydrogen gas.

(b) The mass of water produced by the reaction is equal to the mass of hydrogen gas (2 x 1.00794 g/mol) plus the mass of oxygen gas (16.00 g/mol) multiplied by the molar ratio of hydrogen gas to oxygen gas (2:1). This gives us a total mass of 18.01588 g.

The new volume of a gas when the pressure is increased to 7.0 atmospheres is 3.57 L.

The volume of a gas can be calculated by using the following formula:

P₁V₁ = P₂V₂

Where;

According to this question, 5.0 litres of a gas at an initial pressure of 5atm is given. The new volume can be calculated as follows:

5 × 5 = 7 × V

25 = 7V

V = 25/7

V = 3.57L

Learn more about volume at: https://brainly.com/question/24189159

#SPJ1

It is true that two moles of oxygen will take up twice as much space as two moles of hydrogen at same temperature and pressure.

The mean kinetic energy of every one of the atoms and molecules in a substance is what chemists refer to as the substance's temperature. Different parts of a material have different amounts of kinetic energy. The kinetic energy of the particles at any instant can be represented as a distribution.

The normal kinetic energy of the water molecules in the hotter water vessel is greater than those in the cooler glass, for example, if two glasses of water are measured to have different temperatures.

To know more about temperature visit:

https://brainly.com/question/15520591

#SPJ1

Answer:

3

Explanation:

Answer:

2 moles of H3PO4 reacts with 3 moles of FeBr2

Explanation:

Hope this helps :)

Two layers must have been separated in some way if they are not attached.

The two networks are single layer perceptron networks, in other words. A line is produced by each perceptron. We may infer from the fact that only two lines are needed to represent the decision border that there will be two hidden neurons in the first hidden layer. We have one hidden layer and two hidden neurons up until this moment.

These are "hidden" since the training dataset's nodes' actual values aren't known. Indeed, all we know is the input and output. There is at least one hidden layer in every neural network. It is not a neural network if it is not.

To know more about layers visit:-

https://brainly.com/question/13596112

#SPJ1

When 84 grams of MgCO3 decompose, 40.166 grams of MgO will be formed.

What is Decomposition Reaction?

A chemical process known as a decomposition reaction occurs when a single component splits into two or more simpler compounds. It is the opposite of a synthesis reaction, to put it another way.Decomposition reactions occur when a compound is exposed to energy in the form of heat, light, or electricity, or when it reacts with another substance.

The balanced chemical equation for the decomposition of magnesium carbonate (MgCO3) is:

MgCO3 → MgO + CO2

From the equation, we can see that 1 mole of MgCO3 produces 1 mole of MgO. We need to find the number of moles of MgCO3 in 84 grams of the compound:

n(MgCO3) = m/M = 84 g / 84.3139 g/mol = 0.996 mol

Therefore, we can expect 0.996 moles of MgO to form as well. To find the mass of MgO, we can use its molar mass:

m(MgO) = n(MgO) * M(MgO) = 0.996 mol * 40.3044 g/mol = 40.166 g

So, when 84 grams of MgCO3 decompose, 40.166 grams of MgO will be formed.

Learn more about Decomposition Reaction from given link

https://brainly.com/question/27300160

#SPJ1

Answer:
You will need 6.4 joules

1. When 36.0 g of H₂O is mixed with 67.0g of Fe, the moles of Fe₃O₄ produced by each reactant will be;

2. Fe is the limiting reactant.

3. H₂O is the excess reactant

4. The theoretical Yield amount in mol Fe₃O₄ is 0.4 moles

5. The actual yield is obtained from the lab

6. The mass of excess reactant is 7.2 g

Equation of the reaction: 3 Fe + 4 H₂O ---> Fe₃O₄ + 2 H₂

Molar mass of Fe = 56 g

Molar mass of H₂O = 18 g

Molar mass of Fe₃O₄ = 232 g /mol

Molar mass of H₂ = 2.0 g

1. When 36.0 g of H₂O is mixed with 67.0g of Fe, the moles of Fe₃O₄ produced by each reactant will be;

H₂O:

moles of Fe₃O₄ produced= 36/18 * 1/4

moles of Fe₃O₄ produced = 0.5 moles

Fe:

moles of Fe₃O₄ produced = 67/56 * 1/3

moles of Fe₃O₄ produced = 0.40 moles

Fe is the limiting reagent while H₂O is the excess reagent.

Moles of H₂O required = 36/18 - 0.4 * 4

Moles of H₂O required = 0.4 moles

The mass of excess reagent = 0.4 * 18

The mass of excess reagent = 7.2 g

Learn more about limiting reagents at: https://brainly.com/question/26905271

#SPJ1

Answer:

sodium(Na) +Chlorine(Cl)=Sodium chloride(NaCl)

Hydrogen(H)+ Fluorine (F)=Hydrogenflouride(HF)

Hydrogen (H) + Oxygen (O) =water(H2O)

Magnesium (Mg) + Bromine (Br) =Magnesium bromide(MBr)

Aluminum (Al) + Chlorine (CI) =Aluminium chloride(AlCl3)

Hydrogen (H) + Nitrogen (N) = ❌

Boron (B) + Sulfur (S) = ❌

Magnesium (Mg) + Phosphorous (P) = ❌

Carbon (C) + Hydrogen (H) =Hydrocarbons(CH3,CH4,C2H5,C2H6 and so on)

Silicon (Si) + Oxygen (O) =sillicate oxide(SiO3)

Explanation:

The reactions without answers cannot occurs as the reating element cant form a bond

The total pressure of the  mixture is 2.03 atm.

To solve this problem, we can use the ideal gas law, which relates the pressure, volume, number of moles, and temperature of a gas:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

First, we need to calculate the number of moles of each gas present in the cylinder. For helium:

n(He) = PV / RT

n(He) = (1.71 atm) (2.00 L) / (0.0821 L atm/mol K) (300.15 K)

n(He) = 0.139 mol

For argon:

n(Ar) = mass / molar mass

n(Ar) = 4.32 g / 39.95 g/mol

n(Ar) = 0.108 mol

The total number of moles in the cylinder is the sum of the moles of helium and argon:

n(total) = n(He) + n(Ar)

n(total) = 0.139 mol + 0.108 mol

n(total) = 0.247 mol

Now, we can use the ideal gas law to calculate the total pressure of the mixtP(total) = n(total) RT / V

P(total) = (0.247 mol) (0.0821 L atm/mol K) (300.15 K) / (2.00 L)

P(total) = 2.03 atm

Therefore, the total pressure of the resulting gaseous mixture is 2.03 atm.

Learn more about total pressure below.

https://brainly.com/question/23486705

#SPJ1

Answer:

B. trough to trough is NOT an accurate way to measure wavelength.

Explanation:

The correct way to measure wavelength is from crest to crest or from trough to trough, as these are the points of maximum displacement in the wave. Alternatively, one could measure from a point halfway between two crests (or two troughs) to another point halfway between the next two crests (or troughs), which is known as half crest to half crest measurement.

The accurate ways to measure the wavelength of a wave are between two crests (crest to crest), two troughs (trough to trough), or half crest to another half crest. Measuring from a crest to a trough gives half the wavelength. Therefore, option A (crest to trough) is not an accurate way to measure wavelength.

In the context of wave physics, the accurate ways to measure the wavelength of a wave are between two successive crests (crest to crest), or two troughs (trough to trough). The measurement from a half crest to another half crest is also valid, as it essentially represents the same distance as from crest to crest or trough to trough. However, measuring from a crest to a trough does NOT give you the wavelength, but instead it gives you half the wavelength because a complete wave cycle is from crest to crest or trough to trough. Therefore, option A (crest to trough) is NOT an accurate way to measure wavelength.

https://brainly.com/question/32677714

#SPJ2

Compared to Li, Li2+ has a higher ionization level.

A smaller atom than Na is Li. As a result, Li has a stronger nucleus attraction for valence electrons than Na. Hence, Li's first ionisation energy is higher than that of a nucleus. Due to the size of the lithium ion, more solvent molecules can easily surround the cationic sphere.

Going from left to right increases the ionisation energy. Ne therefore has the highest ionisation energy of all the elements. Lithium has a higher second ionization energy than beryllium because its valence electrons do not have enough electrons to protect its outer electrons.

To know more about ionization visit:-

https://brainly.com/question/28385102

#SPJ1

143.4kPa would be the new pressure be if the volume was increases to 4.5 L

What is an ideal gas ?

An ideal gas is a hypothetical gas that perfectly complies with the gas laws due to its small size and lack of interactions. A gas that obeys all gas laws at all pressures and temperatures is said to be perfect gas.

When the pressure is expressed in kPa, the ideal gas constant is determined to be 8.314J/Kmol. The pressure, volume, temperature, and number of moles of an ideal gas are all related by a singular equation known as the ideal gas law. The combined gas law connects a gas's volume, pressure, and temperature.

Considering constant n, R and T

P1V1 ⇒ P2V2

239*2.7 ⇒ P2 *4.5

P2 ⇒ 143.4kPa

To learn more about ideal gas law use:

https://brainly.com/question/27870704

#SPJ1

In terms of the quantity of a reactant that is reduced or the amount of such a product that is increased per unit time, the reaction's activation energy is 89.2 kJ/mol.

resistance in opposition to a power, influence, or movement is a reaction, a reactionary act, or an instance of a reactionary act. Particularly: a propensity for an old, typically antiquated political or social structure or policy; a reaction to a given treatment, circumstance, or stimulus. She received the news in shock.

Changes in color, temperature, gas generation, or precipitant formation are common during chemical reactions. Examples of commonplace processes include digestion, combustion, or cooking.

To know more about reaction visit:

https://brainly.com/question/28984750

#SPJ1

Explanation:

Since the process occurs at constant pressure, the total heat flow is equal to the change in enthalpy, ΔH. Since the process occurs in three steps, we need to find the enthalpy change for each step and add them together to find the total heat flow.

Step 1: Isothermal expansion

Since the temperature is constant during this step, the enthalpy change is zero:

ΔH1 = 0

Step 2: Isobaric cooling

The enthalpy change for an ideal gas during an isobaric process is given by:

ΔH2 = -nCpΔT

where n is the number of moles of gas, Cp is the molar heat capacity at constant pressure, and ΔT is the change in temperature. Since the volume is constant during this step, the number of moles of gas is also constant. The molar heat capacity at constant pressure for an ideal gas is Cp = 5/2R, where R is the gas constant. The change in temperature is given by:

ΔT = Tfinal - Tinitial

where Tinitial and Tfinal are the initial and final temperatures, respectively. Since the gas is cooled back to its original temperature, we have:

ΔT = 0

Therefore, ΔH2 = 0.

Step 3: Isochoric compression

During an isochoric process, the enthalpy change is equal to the internal energy change:

ΔH3 = ΔU

The internal energy of an ideal gas depends only on its temperature, so the change in internal energy is given by:

ΔU = nCvΔT

where Cv is the molar heat capacity at constant volume. For an ideal gas, Cv = 3/2R. Since the temperature is constant during this step, the change in internal energy is zero:

ΔU = 0

Therefore, ΔH3 = 0.

The total enthalpy change is the sum of the enthalpy changes for each step:

ΔH = ΔH1 + ΔH2 + ΔH3

ΔH = 0 + 0 + 0 = 0

Since the enthalpy change is zero, the total heat flow is also zero:

Total heat flow = ΔH = 0 J.

The preferred arrangement of electrons in a molecular structure can be determined by calculating the electronic configuration of each atom in the molecule.

What is electronic configuration?

The electronic configuration of an atom is determined by the number of protons in the nucleus and the specific rules governing the filling of energy levels and orbitals. The electronic configuration is usually represented using a notation that indicates the number of electrons in each energy level or orbital.

what is delocalized electron ?

Delocalized electrons are electrons that are not restricted to a specific location or region in a molecule or material, but instead are spread out over multiple atoms or molecules. In other words, delocalized electrons are free to move throughout a larger region instead of being confined to a single atom or bond.

To know more about polar visit:-

https://brainly.com/question/1433127

#SPJ1

If the reaction continues to completion and all of the O2 is burned, we can get 127.32 g of KClO3 from 50.0 g of O2.

The balanced chemical equation for the reaction is:

2 KClO3(s) → 2 KCl(s) + 3 O2(g)

50.0 g O2 × (1 mol O2 / 32.00 g O2) = 1.5625 mol O2

1.5625 mol O2 × (2 mol KClO3 / 3 mol O2) = 1.0417 mol KClO3

1.0417 mol KClO3 × (122.55 g KClO3 / 1 mol KClO3) = 127.32 g KClO3

The mass has two significant figures in the question, thus the amount of O2 released would be 4.0 g. (two significant figures). 3*32 g of O2 result from 122.55 g of KClO3. 0.783353733 g of O2 would be produced from 1 g of KClO3. Thus, 5 g of KClO3 would produce 4.0 g of O2 or 5*0.783353733 g of O2.

to know more about reactants here;

brainly.com/question/17096236

#SPJ1

To draw the skeletal structure from a Lewis structure, you need to identify the central atom and its bonded atoms.

To draw the skeletal structure from a Lewis structure, you need to identify the central atom and its bonded atoms. The central atom is usually the least electronegative atom in the molecule, and it is surrounded by the other atoms that are bonded to it.

Here are the steps to draw the skeletal structure from a Lewis structure:

Identify the central atom: In the Lewis structure, the central atom is usually the atom that has the most connections to other atoms.

Count the total number of atoms: Count the total number of atoms in the molecule or ion.

Replace the bonding electrons with dashes: Replace the bonding pairs of electrons between the atoms with dashes (-).

Arrange the atoms: Arrange the atoms in a way that makes sense based on their connectivity in the Lewis structure. The atoms should be positioned in a way that minimizes the number of intersections between the dashes.

Add lone pairs: If there are any lone pairs of electrons on the central atom, add them to the skeletal structure as dots.

Check for consistency: Make sure the skeletal structure you have drawn is consistent with the Lewis structure in terms of the number of electrons, the types of atoms, and the bonding pattern.

Learn more about Lewis structure:https://brainly.com/question/20300458

#SPJ1