a car can accelerate from a standstill to 100 km/h [E] in 9.60s. calculate the average acceleration

Answer:

P = 559.553 mmHg

Explanation:

Clasius-Clapeyron:

∴ P1 = 23.8 mmHg = 3.173 KPa

∴ T1 = 25°C ≅ 298 K

∴ ΔHv = 40.657 KJ/mol

∴ R = 8.314 E-3 KJ/K.mol

∴ T2 = 96°C ≅ 369 K

⇒ Ln P2/P1 = - (40.657 KJ/mol/8.314 E-3 KJ/K,mol) [(1/369 K) - (1/298 K) ]

⇒ Ln P2/P1 = - (4890.185 K) [ - 6.457 E-4 K-1 ]

⇒ Ln P2/P1 = 3.1575

⇒ P2/P1 = 23.511

⇒ P2 = (23.511)(3.173 KPa)

⇒ P2 = 74.601 KPa = 559.553 mmHg

Answer:

Molar mass of acetic acid = 60 g/mol

Explanation:

Molar mass of any compound is the sum of the atomic masses of all the atoms of elements present in it.

Molar mass of acetic acid:

Formula:

CH₃COOH

Atomic mass of carbon = 12 g/mol

Atomic mass of hydrogen = 1 g/mol

Atomic mass of oxygen = 16 g/mol

Molar mass of acetic acid = 12×2 + 1 × 4 + 16× 2

Molar mass of acetic acid = 60 g/mol

The kind of seismic waves travel through the earth are Congressional longitudinal waves and shear transverse waves.

Explanation:

Answer:

It would be Body waves

Explanation:

There are two main types of waves, body and surface. Since surface waves can only move along the earths surface like water ripples. The answer would be body waves since it travels through earths inner layer

Answer:

1190.2 Torr

Explanation:

Data Given:

Volume of a nitrogen gas ( V )= 4.0 L

temperature of a gas ( T ) = 24 °C

Convert °C  to K

T = °C + 273

T = 24 + 273 = 297 K

mass of nitrogen gas (m) = 7.2 g

Pressure of a gas ( P ) =? in Torr

Solution:

Formula to be used

            PV= nRT . . . . . . .(1)

As we Know

           n= m/M

So, the equation 1 can be written as

      PV = (m/M)RT

Rearrange the above formula

       P = (m/M)RT / V . . . . . . . . . . (2)

Where

R is ideal gas constant

R = 62.37 L Torr mol⁻¹ K⁻¹

M = molar mass of N₂

molar mass of N₂ = 2(14) = 28 g/mol

m = mass of N₂ gas

Put values in equation 1

           P = (m/M)RT / V

          P = (7.2 g / 28 g/mol) 62.37 L Torr mol⁻¹ K⁻¹ x 297 K / 4.0 L

           P = 0.257 mol x 62.37 L Torr mol⁻¹ K⁻¹ x 297 K /4.0 L

           P = 4761 L Torr / 4.0 L

           P = 1190.2 Torr

Pressure of gas (N₂) = 1190.2 Torr

Answer:

Bond are the strong forces that holds two atoms Together in a molecule.

Explanation:

Some properties of bonds are as follow:

1. There are three types of bonds : ionic , covalent , coordinate

2. Ionic bonds are formed by transfer of electron form one atom to other. These bonds are very strong because they are formed by electrostatic force of attraction between opposite charges.

The ionic Bonds have very high lattice energy.

due to ionic bond , ionic compound have very high melting point ,boiling point, conductivity in melt state etc.

3. Covalent bonds : These bonds are formed by the sharing of electron .They are weaker than ionic bonds. The melting point  and electrical conductivity of covalent compounds are lower than ionic bonds.

Why do elements combine to  form bond?

They do so to get stability in order to complete their octet.

When one s- and one p-orbital mix, the resulting hybrid orbitals have a Linear geometry

Explanation:

To produce two similar sp hybrid orbitals the process of combining the valence s orbital with one of the valence p orbitals that are situated in a linear geometry is termed as hybridization method. When atoms are arrayed in a vertical line supporting 180° angle then the molecule is referred to as  Linear molecule.

Carbon dioxide (O=C=O) is the most common sample to explain the linear electron set and molecular geometry. In which there exists a pair of electrons and none lone pairs present. It is accordingly linear in electron-group geometry. The repellent forces depreciate the linear adjustment

Answer:

linear

trigonal planar

tetrahedral

Explanation:

Answer:

6.94 mol

Explanation:

Data given:

Mass of iron filings (Fe) = 388.3 g

no. of moles of iron (Fe) = ?

Solution:

For this formula will be used

       no. of moles = Mass in grams/ molar mass

molar mass of Fe = 56 g/mol

Put values in equation

                no. of moles = 388.3 g / 56 g/mol

                no. of moles = 6.94 mol

So,

no. of moles of iron in jar = 6.94 mol

The jar contains approximately 6.95 moles of iron.

The number of moles of a substance can be calculated using the formula:

moles = mass / molar mass

In this case, the mass of iron filings is given as 388.3 g. The molar mass of iron is 55.845 g/mol. By substituting these values into the formula, we get:

moles = 388.3 g / 55.845 g/mol = 6.95 mol

Therefore, the jar contains approximately 6.95 moles of iron.

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Protons, neutrons, and electrons are subatomic particles that makeup atoms. Protons carry a positive charge, neutrons are neutral, and electrons carry a negative charge. The atom's actual mass might not equate to the sum of its subatomic particles due to the mass defect.

The subatomic particles you are referring to are protons, electrons, and neutrons, which are the building blocks of atoms. A proton has a mass of 1.0073 amu and a charge of 1+. A neutron is a slightly heavier particle with a mass of 1.0087 amu and a charge of zero, hence its name suggesting neutrality. The electron has a charge of 1- and is much lighter with a mass of about 0.00055 amu. Interestingly, the sum of an atom's subatomic particles does not equate to the atom's actual mass. This missing mass is known as the mass defect.

Subatomic particles also include neutrinos and other particles produced in accelerator experiments. Protons, electrons, and a few other particles, such as quarks, may be fundamental building blocks, but the substructure of quarks and electrons may be smaller than is presently observable.

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Answer:

Sound energy is the form of energy generated when an object vibrates. Once produced through vibrations, sound energy is transferred in waves through mediums such as air and water before it reaches your ears.

Sound energy is a type of energy associated with the vibration of matter and its transmission from a source. It involves both kinetic and potential energy, traveling in periodic waves causing simple harmonic motions in atoms. It is perceived through hearing.

Sound energy represents a type of energy associated with the vibration of matter. It emerges as a result of a disturbance of matter transmitted from the source outward. The atoms undergoing this disturbance are typically more organized than their thermal motions.

Sound energy involves the movement of particles, thus, combining both kinetic and potential energy. This movement is due to the elasticity of the material in which the sound is propagating. It's essential to note that sound energy travel in waves, more specifically, periodic waves, causing atoms to undergo simple harmonic motions.

The perception of sound energy is what we often refer to as hearing. Just as sight is the perception of visible light, hearing is how we interpret the energy carried by sound waves.

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Answer:0.102 milliliters is required

Explanation:

The easy way to obtain this is to take unit conversation very important as diphenhydramine has a molar mass of 255.355grams per mole and the concentration of the liquid diphenhydramine is 12.5 milligrams per 5 milliliters.

We have to convert the molar mass into milligrams per mole by dividing by 1000 which yields 0.255355mg/mol then;

Simplify the molar mass divided by the concentration of the liquid diphenhydramine;

0.255355/12.5/5

This equals 0.102 milliliters!

Without the specific dosage, we cannot give a specific amount of milliliters. However, if we knew the dosage, we could use a proportion to calculate the corresponding milliliters. For example, a dosage of 25 mg would result in an administration of 10 mL.

The question seems to be missing the specific dosage that should be given to the child. However, if we knew the specific dosage, we could calculate the milliliters of diphenhydramine to be administered using a proportion. For example, if the dosage was 25 mg, we would use the information that 12.5 mg corresponds to 5 mL to set up the equation: 12.5 mg/5 mL = 25 mg/x mL. Cross multiplying gives the equation 12.5x = 125, so x = 10 mL would be the appropriate dosage.

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Answer:

The last region should be right

Explanation:

Answer:

share

Explanation:

Answer:

Such a bond forms when the valence (outermost) electrons of one atom are transferred permanently to another atom.

Explanation:

Answer: The electrostatic attraction between the opposite charged ions is responsible for the force makes up ionic bonds

Explanation:

Answer:

11.43g of Aluminum Hydroxide

Explanation:

Since we know that the sulfuric acid is the limiting reactant in this chemical reaction, we know that we are going to be left with excess aluminum hydroxide. So to find the amount of leftover aluminum hydroxide we are going to need to convert the given amount of sulfuric acid to the amount of aluminum hydroxide needed to react with the sulfuric acid.

[tex]\frac{35g H_{2}SO_{4}}{1}*\frac{1 mole H_{2}SO_{4}}{98.079 g H_{2}SO_{4}} *\frac{2 moles Al(OH)_{3} }{3 moles H_{2}SO_{4}} * \frac{78.003 g Al(OH)_{3} }{1 mole Al(OH)_{3} } = 18.557 g Al(OH)_{3}[/tex]

Once you do that, you need to subtract that number from the amount of aluminum hydroxide given to get the amount of left over aluminum hydroxide.

[tex]30 g Al(OH)_{3} - 18.557 g Al(OH)_{3} = 11.43 g Al(OH)_{3}[/tex]

Hope this helps!

The answer for 1/0.00032 in standard scientific notation is 3.125 * 10^3.

Explanation:

For conversion of the given number in scientific notation follow

a * 10^b

The steps to see how 3,125  written in scientific notation as follows.

Step 1

To find a, The number is moved right to one decimal place.

Original Number: 3,125

New Number: 3.125

Step 2

Now, to find b, Find the decimal count on the right side.

New Number: 3 .1 2 5

Decimal Count:       1 2 3

There are three places found.

Step 3

Now we can reconstruct the number into scientific notation.

The Scientific notation is: a x 10^b

a = 3.125

b = 3

Now writing the whole thing:

3.125 x 10^3

Step 4

Check your work:

10^3 = 1,000 x 3.125 = 3,125.

Answer: 34,918 g NI3

Explanation: solution attached:

Use the relationship of 1 mole NI3 is equal to its molar mass 395 g NI3

88.4 moles NI3 x 395 g NI3 / 1 mole NI3

= 34,918 g NI3

Answer:

The question is incomplete.(not enough data provided).

Explanation:

Answer:

                     Empirical Formula  =  CH

                    Molecular Formula =  C₆H₆

Explanation:

                   The structure of benzene is attached.

It can be easily seen from the structure of benzene that it contains six carbon atoms and six hydrogen atoms. Therefore, one should remember that the structure formula is made up of molecular formula as it contains and show the exact number of atoms. Hence, we can finalize the molecular formula as C₆H₆ on the basis of inspecting the structure formula.

Secondly, the empirical formula is calculated from the molecular formula. It does not depend upon the structure formula of a compound. As empirical formula is the simplest positive integer ratio of atoms present in a compound hence for benzene we can calculate this formula as CH because the simplest ratio of 6:6 is 1:1.

Explanation:

Concentration of solution  

It is the amount  of solute present in given amount of solution .

There are different methods to know about the concentration of solutions .

out of it mass or volume percentage and parts per million is one of the methods .

Mass Percentage

it is calculated by taking the ration of mass of solute  to mass of solution x 100.

That is:

Mass percentage = mass of solute/mass of solution x 100

Parts per million (ppm )

It is calculated by taking the ratio of  number of parts of solute /number of parts of solution x 10⁶.

This method is preferred only when concentration of solute is very less like  used in case to measure amount of pollutants in air .It is an efficient method than percentage method in that case .

Answer:

Concentrations like the ones shown in the graph are relatively small. Writing them as percentages would require decimal points and many leading zeros. Therefore, scientists choose ppm over percentages to show CO2 concentrations.

Explanation:

Explanation:

cogeneration prodeuces electricity from steam and uses steam in other chemical reactions simultaneously.

Answer:

It’s heat

Explanation:

Answer:

C the breaking down of rock

Answer: option C. the breaking down of rock

Explanation: weathering is the breaking down of rock by the action of rain, temperatures and biological activities.

Answer:

D  They begin to move quickly

Explanation:

Answer:

D. They begin to move faster.

Answer:

            Cl⁻ is the reducing agent.

Explanation:

The redox reaction is as follow:

                    MnO₂  + 4H⁺ + 2Cl⁻   →   Mn²⁺ + 2H₂O + Cl₂

One should know the following terms,

Reducing agent:

                          An atom or element which tends to lose electron during a chemical reaction and get itself oxidized. In above reaction Cl⁻ is reducing agent as it carries a negative charge (means it has one extra electron) on the reactant side while, it has zero oxidation state on the product side. It means going from -1 to 0 the Cl lost one electron hence, it is an reducing agent according to definition.

Oxidizing Agent:

On the other hand oxidizing agent is an element or compound which tends to accepts electron(s) and get itself reduced. In above reaction Mn has an oxidation state of +4 on reactant side and after gaining electron from Cl it has changed to +2 on the product side. Hence, it has reduced but has oxidized the Cl atom so it is an oxidizing agent according to definition.

Answer:

When used properly (it should always be diluted with water before use), chlorine bleach is safe for disinfecting surfaces. It kills harmful germs and bacteria and sanitizes clothes in the laundry.

Answer:

bleach

Explanation:

sodiam hydrochlorite

No mutations that neither benefit nor harm the organism has no effect on the organism's survival.

Explanation:

The neutral mutations do not cause any effect on the organism they occur. They are called silent point mutations because they do not code for the amino acid change in the proteins.

They have no effect on the organism's survival neither beneficial nor harmful effect.

The neutral mutations do not affect the process of Natural selection.

Answer: Mutations that neither benefit nor harm the organism have A NEUTRAL effect on the organism's survival.

Explanation:

If it is non beneficial and not harmful, it will not do anything to effect the organism's survival. So it is neutral.

Neutral definition: Not helping or supporting either side in a conflict.

Answer:

The formula for acyclic saturated hydrocarbons (i.e., alkanes) is CnH2n+2. The most general form of saturated hydrocarbons is CnH2n+2(1-r), where r is the number of rings. Those with exactly one ring are the cycloalkanes.

Explanation:

Answer:

An example of a hydrocarbon molecule structure is shown in the image below.

Explanation:

Hydrocarbons are organic compounds specifically made up of carbon and hydrogen atoms. The molecular structure consists of a framework of carbon atoms to which the hydrogen atoms are attached. The carbon atom chains can be linear or branched, and open or closed.

1.61 mol, Al acting as a limiting reactant, and an excess of HBr

3.22 mol of Al in moles

4.96 mol of HBr is one mole.

Moles of H2O generated =?

What is the excess reactant? What is the limiting reactant?

Chemical formula:

A + B + H₂ = 2AlBr + H

We shall now contrast the moles:

              Al:   H

                 Step 2:

                In 3.22: 1/2×3.22 = 1.61 mol

               HBr: H₃

                Step 2:

               2.48 mol is equal to 1/2×4.96 in this case.      

Since Al produces fewer moles of H3 than HBr, it will operate as a limiting reactant when HBr is present in excess.

Moles of H₂:

1.61 mol of H2 is the number of moles.

Answer:

B. Chemical energy to electrical energy