Which structure is a valid representation of a hydrocarbon molecule?

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:

D  They begin to move quickly

Explanation:

Answer:

D. They begin to move faster.

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.

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:

B. Chemical energy to electrical energy

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.

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

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:

Answer:

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

Explanation:

Answer:

share

Explanation:

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

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.

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.