What would you call a linear alkane that contains 8 carbons?

Answer:

A mixture has 2 or more substances that are physically combined

Explanation:

Examples:

-Dirt and water (Mud)

-Water and salt (Sea water)

-Smoke and fog (Smog)

Answer:

IR spectroscopy can be used to identify chemical structures are present in compounds.

Explanation:

Infrared spectroscopy is a technique in organic chemistry that can be use use to identify chemical structures present in compounds because it is base on the ability of different functional groups to adsorb infrared light.

This work by shinning the infrared lights into the organic compounds to be identified, some of the frequencies of the infrared lights are adsorbed by the compounds and its identify groups of atoms and molecules in the compound.

Answer:

0.617

Explanation:

The experimental value is the average of all the values recorded:

(2.65 + 2.73 + 2.77)/3 = 2.72

Then use the equation:

(2.72 - 2.7)/ 2.7 x 100 = 0.617

Answer:

independent: type of liquid

dependent: growth of plant

control: time

constant: time

constant: time

hypothesis: If I water the plant with water, it will grow the most because water is the liquid that sustains life on earth.

Explanation:

Answer:

dispersion forces

Explanation:

SO3 is a trigonal planar molecule. All the dipoles of the S-O bonds cancel out making the molecule to be a nonpolar molecule.

The primary intermolecular force in nonpolar molecules is the London dispersion forces. As expected, the London dispersion forces is the intermolecular force present in SO3.

Hence SO3 is a symmetrical molecule having only weak dispersion forces acting between its molecules.

The intermolecular bond in the sulfur trioxide has been the dispersive force. Thus, option C is correct.

The sulfur trioxide has been the nonpolar molecule with the presence of S-O and S=O bonds.

The nonpolar bonds have consisted of weak intermolecular interactions resulting from the London Dispersive force. This type of interaction has been able to bind the nonpolar molecules together.

Thus, the intermolecular bond in the sulfur trioxide has been the dispersive force. Thus, option C is correct.

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Answer:

15.0g/L is the concentration of nickel(II) chloride contaminant in the original groundwater sample.

Explanation:

Based on the reaction:

NiCl2 (aq) + 2AgNO3 (aq) -> 2AgCl (s) + Ni(NO3)2 (aq)

Where 1 mole of NiCl₂ reacts producing 2 moles of AgCl.

To solve this problem, we need to convert mass of AgCl to moles to know the moles of NiCl₂ that reacts. With these moles and the volume of the sample (250mL = 0.250L), we can determine the molar concentration of the contaminant in the sample

Moles AgCl:

8.3g of AgCl were collected. In moles (Molar mass AgCl: 143.32g/mol):

8.3g AgCl * (1mol / 143.32g) = 0.05791 moles AgCl

Moles NiCl₂:

As 2 moles of AgCl are produced from 1 mole of NiCl₂. Moles of NiCl₂ are:

0.05791 moles AgCl * (1 mole NiCl₂ / 2 moles AgCl) = 0.02896 moles NiCl₂

Molar concentration:

0.02896 moles NiCl₂ / 0.250L =

0.1158M

In g/L (Molar mass NiCl₂: 129.6g/mol):

0.1158 mol / L * (129.6g / mol) =

Following are the calculation to the atomic mass:

Given:

Please find the attached file.

To find:

atomic mass=?

Solution:

Following are the calculation to the atomic mass:

[tex]\to 89.90470\times (0.5293)+90.90565\times (0.1154)+91.90504\times (0.1765)+93.90632\times (0.1788)\\\\\to 47.58655771 +10.49051201 +16.22123956+16.790450016\\\\\to 91.0887593\approx 91.0887\ amu \\\\[/tex]

Therefore, the final answer is "91.0887".

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C) It contains the same number of electrons and protons.

Answer:

Non-polar compounds: [tex]CCl_4[/tex], [tex]O_2[/tex], [tex]CO_2[/tex]

Polar compounds: [tex]CH_3Cl[/tex], [tex]H_2O[/tex]

Explanation:

For this question, we must start with the Lewis structure for each molecule and then we can do their respective analysis:

-) [tex]CCl_4[/tex]

In this case, we have 4 equal atoms attached to the central atom. Therefore, we have the same magnitude of electronegativity. Chlorine atoms have different and opposite directions. Therefore due to the orientation the dipole moments cancel and the net dipole moment will be zero and the molecule will be non-polar.

-) [tex]O_2[/tex]

In this case, we have a linear structure in which the magnitude of the dipole moment is the same, but the direction is the opposite. Therefore the dipole moments are canceled and the molecule will be non-polar.

-) [tex]CO_2[/tex]

In this case, we also have a linear structure in which the magnitude of the dipole moment is the same, but the direction is the opposite. Therefore the dipole moments are canceled and the molecule will be non-polar.

-) [tex]CH_3Cl[/tex]

For this molecule, we have a different atom. The hydrogen atom, therefore the magnitude of one of the atoms attached to the central atom is different and the magnitude of the net dipole moment will be different from zero and the molecule will be polar.

-) [tex]H_2O[/tex]

For this molecule, due to the structure of the molecule, the dipole moments of oxygens will not have a totally opposite configuration. Therefore, the net dipole moment will be different from zero and the molecule will be polar.

See figure 1 to further explanations

I hope it helps!

Answer:

a) 4.69

Explanation:

v=mp

m=10.55

p=2.25

v=10.55/2.25=4.69

Answer:

A. is the answer i think

Explanation:

Answer:

c. HF can participate in hydrogen bonding.

Explanation:

The boiling points of substances  often reflect the strength of the intermolecular forces operating among the molecules.

If it takes more energy to  separate molecules of HF than of the rest of the hydrogen halides because HF molecules are held  together by stronger intermolecular forces, then the boiling point of HF will be higher than  that of all the hydrogen halides.

A particularly strong  type of intermolecular attraction is called the hydrogen bond, which is a special type of dipole-dipole interaction between the hydrogen atom in a polar bond, such as N-H, O-H, or F-H, and an electronegative O, N, or F atom.

Answer:

b=200

l=100

Explanation:

so since it is a square all sides would be equal

when you cut the square vertically the dimensions will change

the bredth would be same that is 200

but the length would be half that is 100

Answer: 2 Al + 3 Cl₂ → 2 AlCl₃

Explanation:

To balance equations, you want to have the same amount of each element. We know 2 Al + 3 Cl₂ → 2 AlCl₃ is the balanced equation because there are equal amounts of each element on both sides. There are 2 Al and 6 Cl.

Answer:none of the above

Explanation:

The complementary base sequence to GTAGCT is C-A-T-G. Therefore, option E is correct.

If the base sequence of the other strand is known, complementary base pairs allow the sequence of one strand to be predicted. In DNA, complementary base pairing is crucial because it enables the base pairs to be put in the most energetically advantageous configuration.

Reverse transcriptase, a DNA polymerase that can use either DNA or RNA as a template, creates complementary DNA (cDNA), a DNA copy of a messenger RNA (mRNA) molecule.

The nitrogenous bases' adenine, thymine, cytosine, and guanine are referred to as complementary base pairs. Adenine will always pair with its complementary base, thymine, and cytosine will always couple with its complementary base, guanine, in a double strand of DNA.

Thus, option E is correct.

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The mixture that has been heterogeneous has been oil and water. Thus, option A is correct.

The mixture has been defined as the combination of two or more substances. The mixture has been categorized as pure and heterogeneous mixture based on the solubility of the constituents.

The pure mixture has been defined as the one in which the constituent substances are completely soluble, and are not visible with the bare eyes.

The heterogeneous mixture has been defined as the combination in which the constituents elements are not completely soluble and are easily differentiated from each other by physical means.

Thus, the mixture that has been heterogeneous has been oil and water. Thus, option A is correct.

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Answer:

2HCl + Ba(OH)2 = BaCl2 + 2H2O

Explanation:

To solve such this we must know the concept of  neutralization reactions. Therefore, the  balanced equation for the neutralization of hydrochloric acid by barium hydroxide is 2HCl + Ba(OH)[tex]_2[/tex] [tex]\rightarrow[/tex] BaCl[tex]_2[/tex] + 2H[tex]_2[/tex]O.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved.

Neutralization is an acid-base reaction in which an acid reacts with just a base to produce salt and water. The pH of a neutralizing solution is determined by the acid strength and concentrations of the reactants. The balanced equation for neutralization of hydrochloric acid by barium hydroxide can be written as

2HCl + Ba(OH)[tex]_2[/tex] [tex]\rightarrow[/tex] BaCl[tex]_2[/tex] + 2H[tex]_2[/tex]O

Therefore, the balanced equation for the neutralization of hydrochloric acid by barium hydroxide is 2HCl + Ba(OH)[tex]_2[/tex] [tex]\rightarrow[/tex] BaCl[tex]_2[/tex] + 2H[tex]_2[/tex]O.

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Answer:

Explanation:

An electric light bulb is turned on.   Thermal heat , radiant light

A log is burned in a fireplace .  Thermal heat        , radiant light

A green plant grows  Chemical

A bicycle is pedaled  Mechanical ,

A flashlight is turned on.   radiant light

Answer:

greenhouse effects are molecules that trap heat on earth atmosphere

Answer:

play an important role in Earth's climate.

Explanation:

Greenhouse gases are certain molecules in the air that have the ability to trap heat in the Earth's atmosphere. Some greenhouse gases, like carbon dioxide (CO2) and methane (CH4), occur naturally and play an important role in Earth's climate. If they didn't exist, the planet would be a much colder place.

Answer:

6 moles

Explanation:

Forst of all arrange the equation, it isn't in the right order and I suppose the equation is of aerobic respiration:

That is :

C6H12O6 + 6O2 ---------> 6CO2 + 6H20 + 2830kJ (energy)

Then use the ratio which can be seen by the balancing:

02 : CO2

6: 6

The ratio clearly shows how much moles of CO2 are produced; 6 moles

The term mole concept is used here to determine the moles of carbon dioxide produced. The moles of CO₂ produced from the given reaction is 6.

One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is:

Number of moles = Given mass / Molar mass

The balanced equation for the oxidation reaction of glucose is given as:

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + E

In a balanced equation the number of atoms of reactants and products on both sides of the equation are equal. The number of 'C', 'H' and 'O' atoms on both sides of the equation are equal.

Here the number of moles of CO₂ produced from 6 moles of oxygen is 6.

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Answer:

The main reason that NO, has a higher boiling point than CO is that NO has a larger molar mass.

The main reason that NH3 has a higher boiling point than CH4 is that NH exhibits hydrogen bonding.

The main reason that CS2 has a higher boiling point than CO2 is that CS2 has a larger molar mass.

Explanation:

The larger the molecular mass, the greater the surface area of the molecule and the greater the magnitude of dispersion forces. Hence, among nonpolar molecules, increase in molecular mass leads to a higher boiling point due to stronger dispersion forces.

Though CO and NO possess dipole-dipole forces, NO has a greater molar mass than CO, hence it has a higher boiling point than CO.

NH3 exhibits intermolecular hydrogen bonding hence it has a much higher higher boiling point than CH4 irrespective of the fact that their molar masses are close in magnitude.

Answer:

The main reason that NO2 has a higher boiling point than CO2 is that NO2 exhibits dipole-dipole forces.

The main reason that CS2 has a higher boiling point than CO2 is that CS2 has a larger molar mass.

The main reason that NH3 has a higher boiling point than CH4 is that NH3 exhibits hydrogen bonding.

Answer:

True

Explanation:

In a chemical reaction, there's usually something to do with the composition of the substance. In a physical reaction, the effect could have something to do with appearance or smell.

Hope this helps!

Answer:

You use the number of electrons in an aluminum atom to determine how many protons are in its nucleus because the atomic number of aluminum, 13, tells you how many electrons and protons they are. Then you can the  number of neutrons by subtract it's atomic number by its mass, 27, which will result in the number of neutrons, 14.

Explanation:

The atomic number of aluminum is 13 and mass number of aluminum is 27. This helps us to tell us how many protons, electrons and neutrons are there in its nucleus.

The atomic number of a chemical element  is defined as the charge number of an atomic nuclei.

The mass number of an atom tells us the number of protons and neutrons are there in an atoms.

The number of electron surrounding the nucleus is equal to number of protons present in the nucleus. Hence there is 13 electrons  and 13 protons in the nucleus.

Now we can calculate number of neutrons present in the nucleus.

Mass number = number of protons + number of neutrons

Number of neutrons = mass number - number of protons

                                   = 27 - 13 = 14

So number of neutrons is 14 , and  number of protons is 13.

Thus, atomic number of aluminum is 13 and mass number of aluminum is 27. This helps us to tell us how many protons, electrons and neutrons are there in its nucleus.

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Answer:  28.2 g of ²⁶Mg can be isolated from the 9.87 mole sample of natural magnesium

Explanation:

we know that natural abundance of ²⁶Mg is 11.01 %

therefore moles of ²⁶Mg isolated from 9.87 mole sample of natural magnesium will be :

( 11.01 x 9.87 mol) / 100  = 1.09 mol

so

mass of ²⁶Mg = mol x molar mass

⇒ 1.09 mol x 25.9826 g/mol

= 28.2 g

Therefore 28.2 g of ²⁶Mg can be isolated from the 9.87 mole sample of natural magnesium

Answer:

Gases in Earth's atmosphere form a protective layer

Nitrogen, oxygen and ozone molecules in the upper atmosphere and stratosphere absorb ultraviolet light from the Sun, providing a shield that prevents this radiation from passing to the Earth's surface.

Explanation:

i got this from  

...www.aeronomie.be

Answer:

Organic chemistry is very important to know the strength and forms of the compounds.

Explanation:

There are two extreme bonding that is ionic and covalent. There are some ionic bonds that contains the covalent bonding. Some of ionic bond are partially covalent and some covalent bond are ionic. Polar covalent have the extreme type of bonding.

Most of the carbon compound are bonded covalently. But these are partial ionic too. Polarity is defined as the measurement of the separation of the charges of the compounds at both the ends.

Ionic compounds allow synthesis in organic compound. Covalent bonds are differently important for carbon molecules bonding.

Thus the bonds that chlorine forms with sodium is different and when form with carbon then compounds will be different

Answer: 6

Explanation: Because there is a decimal point, the zero after is included. The first 5 numbers are significant because they aren’t zero. Zeros are included if there is a decimal point (13.0, 160.0) or are in the middle of a number (16007, 101). They are not included if they are before a decimal (000.0081, 0.000021)-(there are only 2 sig figs in these: the actual numbers) or after a number without a decimal (15840000, 100)-(all the zeros in these numbers are not significant).

Answer:

Silicon atoms have 14 protons.

Silicon atoms will react with other atoms in order to gain stability.

Silicon atoms have 14 electrons.

Answer:

The correct answer is - b. transmission electron microscope.

Explanation:

A transmission electron magnifying instrument fires a light emission through an sample to create an amplified and magnified picture of a specimen.

The transmission electron magnifying instrument is utilized to see thin slices of specimen or specimen smaller than 100 nm through which electrons can pass and form a image of specimen. The TEM is comparable to from various perspectives to the ordinary light magnifying instrument.

Thus, the correct answer is - b. transmission electron microscope.

Answer:

Potential energy can be defined as the energy in a body due to its position

In simple terms potential energy is the energy at rest

Explanation: Examples ;