Find the mass in kilograms in 2.6 mol of C8H12 (which is called windowpane).

Answers

Answer 1

Considering the definition of molar mass,  the mass in 2.6 moles of C₈H₁₂ is 0.2808 kg.

Definition of molar mass

The molar mass of an atom or molecule is the mass of one mole of that particle expressed in grams.

The molar mass of a compound is the sum of the molar mass of the elements that form it multiplied by the number of times they appear in the compound.

Mass of 2.6 mol C₈H₁₂

Being the molar mass of C₈H₁₂ 108 g/mole, you can apply the following rule of three: If by definition of molar mass 1 mole of the compound contains 108 grams, 2.6 moles of the compound contains how much mass?

mass= (2.6 moles× 108 grams)÷ 1 mole

mass= 280.8 grams= 0.2808 kg (being 1000 gr= 1 kg)

Finally, the mass is 0.2808 kg.

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Related Questions

Select the correct answer.

How does substituting a hydrogen atom with a halogen in a hydrocarbon affect the resulting compound?

A.
All the single bonds in the original molecule change to double bonds.
B.
The boiling point of the new compound increases.
C.
The bonds between the carbon atoms in the molecule become weaker.
D.
The resulting compound is called a saturated hydrocarbon.
E.
The substitution allows each carbon atom to accept more than four valence electrons.

Answers

Answer:

E. The substitution allows each carbon atom to accept more than four valence electrons.

Explanation:

Halogens (except for fluorine) have seven valence electrons, which gives them the flexibility to participate in more than four covalent bonds. Hydrogen only has one valence electron, so it tends to form only four covalent bonds. In a substitution reaction, each halogen provides the carbon atom with additional electrons, allowing it to accept more than the usual four.

Answer:

C. The bonds between the carbon atoms in the molecule become weaker.

Explanation:

The molar mass of CCl4 is 153. 81 g/mol How many grams of CCl4 are needed to have 5. 000 mol?​

Answers

The molar mass of CCl4 is 153. 81 g/mol. '769.0 g' of CCl4 are needed to have 5.000 mol.

What is molar mass?

Molar mass is the mass of one mole of a substance. It is usually expressed in grams per mole (g/mol). The molar mass of a substance is calculated by taking the sum of the atomic weights of all of the atoms in the molecule multiplied by the Avogadro constant (6.022x10^23).

To find the number of grams of CCl4 needed to have 5.000 mol, use the formula:

Mass (grams) = Molar mass (g/mol) x Number of moles

Mass (grams) = 153.81 g/mol x 5.000 mol

Mass (grams) = 769.0 g.

'769.0 g' of CCl4 are needed to have 5.000 mol.

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Estimate the net charge at pH=7. Assume the pKa values given in the table above. Term____

Answers

The net charge at pH=7. The pKa values given in the table above will term is referred as neutral.

At pH = 7, the solution is considered neutral, which means that the concentration of H+ ions is equal to the concentration of OH- ions, i.e [H+] = [OH-] = 10^-7 M.

To estimate the net charge at pH = 7, you would need to know the pKa values of the acid and the species present in the solution.  It is important to note that the net charge at pH 7 will depend on the acid and species present in the solution, and the pKa values given for that specific acid. In a neutral solution, the pH is equal to 7, which means that the concentration of H+ ions is equal to the concentration of OH- ions. Since the pH is neutral, this means that the solution has no net charge. Neutral solutions contain equal concentrations of positive and negative ions, thus the net charge is zero.

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Since the reduction potential of ions is different, electrolysis can be used to selectively plate out one of the ions in a mixture. A 1.0 L solution containing 0.101 M NiBr2?aq) and 0.407 M CuBr2aq) is subjected to electrolysis. How much time (in hours) would it take to selectively plate out of the cations at a current of 5.0 A? Express your answer numerically to three sig figs in units of hours.

Answers

22.2 seconds will it take to selectively plate out of the cations current of 5.0 Amperes.

E∘cell=E∘cathode−E∘anode it is the formula for finding out the net cell potential of the electrolytic cell. We can write the cell reaction to solve the problem in the following way

1. Write down the (two half) reactions.

2. Balance the (half) reactions (Mass and Charge):

a. Start with elements other than H and O. b. Balance O by adding water.

c. balance H by adding H+.

d. Balancing charge by adding electrons.

(3. Multiply each half reaction to make the number of electrons equal.

4. Add the reactions and simplify.)

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What are the things to consider before using hot and cold compress?

Answers

Answer:

Explanation:

There are several things to consider before using hot and cold compresses:

The condition being treated: Different conditions may require the use of hot or cold compresses. For example, hot compresses may be used to alleviate muscle pain, while cold compresses may be used to reduce swelling and inflammation.

The individual's sensitivity to temperature: Some people may be more sensitive to temperature changes and may need to use a compress that is not as hot or cold.

The duration of use: It is generally recommended to use hot compresses for no more than 20 minutes at a time, and cold compresses for no more than 15 minutes.

The potential for burns or frostbite: Hot compresses should not be used on skin that is broken or damaged, as they can cause burns. Cold compresses should not be applied directly to the skin for an extended period of time, as they can cause frostbite.

The individual's overall health: Individuals with certain medical conditions, such as circulation problems, should be careful when using hot and cold compresses and should consult with a healthcare professional before doing so.

Sort the following phrases as descriptions of alpha helices, beta turns or all alpha Helices 1st residue hydrogen- bonded to 5^th residue (that is, residue n is H- bonded to residue n + 4) all - NH groups point in the same direction Beta Sheets successive R groups point in opposite directions Beta Turns 1^st residue (that is, residue n is H- bonded to residue n+3 All contains-NH hydrogen bonded to C = O

Answers

An alpha helix is a type of secondary structure in proteins. It is a right-handed, coiled-coil structure that is stabilized by hydrogen bonds between the peptide backbone amide nitrogen and carbonyl oxygens of every fourth residue.

1st residue hydrogen-bonded to 5th residue (that is, residue n is H-bonded to residue n+4) - Alpha Helix

All NH groups point in the same direction - Beta Sheet

successive R groups point in opposite directions - Beta Sheet

1st residue (that is, residue n is hydrogen bonded to residue n+3) - Beta Turn

All contains-NH hydrogen bonded to C=O - Alpha Helix

In summary, the first phrase describes an Alpha Helix, the second and third phrases describe Beta Sheets, and the fourth phrase describes a Beta Turn, the fifth phrase also describes an Alpha Helix.

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which of the folowing molecules has the most polar bond between the bonded atoms in terom of greatedst end

Answers

The correct response is b) N - H. Because nitrogen is one of the most electronegative elements in the periodic table, its bond with hydrogen will be the most polar of all.

What exactly is a polar bond?

A polar covalent bond is a covalent association in which the atoms' electron attraction is uneven, resulting in unequal electron sharing. In a polar covalent bond, also known as a polar bond, the distribution of electrons surrounding the molecule is no longer symmetrical. Polar covalent bonds have an unequal distribution of electrons. The difference in electronegativity between the two elements would be between 0.4 and 1.7. The electronegativity gap between polar and nonpolar bonds is less than 0.4.

In this case, the right answer is b) N - H. Because nitrogen is one of the periodic table's most electronegative elements, its bond with hydrogen will be the most polar of all.

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If you need 18.9 grams of HCl for a reaction, and you have a 1.5 M solution of HCl, how many mL of this solution should you use

Answers

If we need 18.9 grams of HCl for a reaction, and we have a 1.5 M solution of HCl, the mL of this solution should we use is 345.3 mL.

Given that :

mass of the HCl =  18.9 grams.

molar mass of the HCl = 36.45 g/mol

moles of the HCl = mass / molar mass

                             = 18.9 / 36.45

                             = 0.518 mol

the molarity of the HCl = 1.5 M

The molarity is given as:

molarity = moles / volumes

volume in L = moles / molarity

                    = 0.518 / 1.5

                    = 0.3453 L

                    = 345.3 mL

Thus, the volume is 345.3 mL.

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Do the same enthalpy calculation for the products of the reaction, CO2+2H2O. Carefully count how many of each bound there is, and consider whether bonds are single or double bonds. Show work!!!!!! and list the totalbond enthalpy of the products.

Answers

The enthalpy of the reaction from the bond energy is +102 kJ/mol. Option C

What is the enthalpy of the reaction?

We have to note that the enthalpy would have to do with the energy that ahs been absorbed or the energy that is released in a reaction. We know that if there is a release of energy then we can say that the reaction is exothermic but if we have a case where the energy has been taken in then we can say that the reaction in that case can be said to be exothermic.

We can see that the enthalpy of the reaction can be calculated on the basis of the bond energy when we write;

Energy of bonds that are broken - Energy of bonds that are formed.

[4(410) + 2(496)] - [2(805) + 2(460)]

(1640 + 992) - (1610 + 920)

2632 - 2530

= +102 kJ/mol

Hence, by calculation of the enthalpy bof the reaction, we can see that the reaction would absorb about 102 kJ of heat per mole of the reactant as shown.

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True or false chemical potential energy is energy stored in a substance because of its composition 

Answers

Answer:  yes

Explanation:

Chemical potential energy is energy stored in a substance because of its composition.

Answer:

True

Explanation:

Chemical Potential Energy Energy is the capacity for doing work or supplying heat. When you fill your car with gasoline, you are providing it with potential energy. Chemical potential energy is the energy stored in the chemical bonds of a substance.

What happens to the reactivity as you move from left to right?

Answers

The reactivity of the element in the periodic table as me move from the left to right in the period it will decreases first and then it will increases.

In the periodic table , for the metals the reactivity of the decreases as we move across the period from left to the right. in the group it will increases as we move from the top to bottom.

In the periodic table for the non metals, the reactivity will increases as we move from left to the right in a period. in the group it will decreases as we move from top to the bottom.

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When a water molecule is split, which part of it is used to make fuels? a. the electrons and protons from the hydrogen b. the electrons and protons from the oxygen c. the electrons and protons from the carbon dioxide d. the ATP

Answers

When a water molecule is split, part of it is which used to make fuels is : a.) the electrons and protons from the hydrogen.

How does water split?

The water molecules break down into hydrogen and oxygen at the atomic level during thermolysis. For instance, around 3% of all H2O dissociates into different combinations of hydrogen and oxygen atoms at 2200 °C, primarily into H, H2, O, O2, and OH.

Water splitting is the chemical reaction where water is broken down into oxygen and hydrogen: 2 H2O → 2 H2 + O2

Efficient and economical water splitting could be a technological breakthrough that could underpin hydrogen economy, based on green hydrogen. A version of water splitting occurs in photosynthesis also but hydrogen is not produced.

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how many chlorine atoms are in 0.650 mol of ca(clo4)2?

Answers

Chlorine atoms that are present in 0.650 mol of ca(clo4)2 is : 7.83 *10^23.

What is meant by molar mass?

Mass in grams of 1 mole of the substance is called the molar mass of a substance. We can obtain a substance's molar mass by summing the molar masses of its component atoms. We can use the calculated molar mass to convert between mass and number of moles of a substance.

As we know, one mole of any atom is equivalent to the Avogadro's number or 6.02 x 10²³ particles.

0.650 * 6.023 * 10^23 * 2

= 7.83 *10^23 chlorine atoms.

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Will someone please help me with these physics questions.
Now assume that all of the potential energy went into kinetic right as it is about to hit the bottom. What would be the value for the kinetic energy? a. less
b. same
c. more
d. not information

Answers

The potential energy will go into kinetic right as it is about to hit the bottom. Then, the value will be the b) same for the kinetic energy.

When an object falls, its potential energy decreases, and its kinetic energy increases. A decrease in the potential energy is exactly the same as an increase in the kinetic energy. According to the law of conservation of energy, just before the lamp stops, the potential energy at the top of the lamp and the kinetic energy at the bottom must be equal. At the foot of the hill, the potential energy is zero and the final energy is all kinetic energy. We can equate these two values ​​according to the law of conservation of energy. Adding the kinetic energy and the potential energy gives a constant (KE+PE=constant).

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9. Convert 17.92 L of CO to grams:

C- 12.011
0-15.999


Answer in FOUR Sig Figs with Units

Answers

Answer:

its correct answer is 22.4 grams

Hypothesize as to why Seaborg removed the actinide and lanthanide series elements and placed them into their own block!

Answers

This is currently going ok because how the pencil is working on it and how the pencil has a different color and how the ink looks in different ways so it doesn’t have a lot to work on but it’s really nice and I like it because it looks really good and it doesn’t have any of that weird stuff that I don’t know what it is by people’s pencil are disgusting because they put burgers on them like come on guys we in high school

what are the two quantities in this module for which we will develop unit factors to do dimensional analysis with chemical substances?

Answers

Mass (often measured in grams) & volume are the two characteristics in this module through which we will create unit components to do statistical approach using different chemicals .

What exactly is a chemical substance?

Chemical substances come in three different forms: elements, compounds, and mixtures. Elements are basically chemicals that don't contain any other substances. In this sense, elements are the fundamental constituents of chemical composition.

How should chemicals be categorized?

The component can be an isotope or a combination if it is pure. If a substance can be divided into its component elements, it is a compound. If a substance is not chemically pure, it is either a heterogeneous mixture or even a heterogeneous mixture. If the composition remains the same throughout, the combination is homogeneous.

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What other factors of weather and climate are affected by elevation?

Answers

Answer:

Wind, Rain and Snow

Consequently, winds are stronger at higher elevations. Colder temperatures at higher elevations also create precipitation, because cold air can't hold as much moisture as warm air. Moisture condenses out of the air as snow and ice, and it falls back to the ground.

The factors that affect the weather and climate are latitude, altitude, wind, and distance from the sea.

What is climate?

Climate can be described as the long-term weather pattern in an area, averaged over 30 years. Climate is the mean as well as the variability of meteorological variables over months to millions of years.

Some of the meteorological variables that are used to measure are temperature, atmospheric pressure, humidity, wind, and precipitation. The climate can be defined as the state of the components of the climate system, including the atmosphere, cryosphere, lithosphere, and biosphere, and the interactions between them.

The climate is affected by its latitude, terrain, altitude, land use, and water bodies and their currents. Climates can be classified based on the average and typical variables, most temperature, and precipitation.  It is used in studying of the biological diversity and how climate change affects it.

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How did the pressure in the left intrapleural cavity change when the valve was opened?
O The pressure in the intrapleural cavity equalized with the atmospheric pressure.
O It went from a positive number to a negative number.
O It went from a positive number to a negative number and the pressure in the intrapleural cavity equalized with the atmospheric pressure.
O It went from a negative number to zero and the pressure in the intrapleural cavity equalized with the atmospheric pressure.
O It went from a negative number to zero.

Answers

The pressure in the left intrapleural cavity changes when the valve was opened as : It went from negative number to zero and the pressure in intrapleural cavity equalized with the atmospheric pressure.

What is meant by intrapleural cavity?

The pressure inside the pleural cavity is called as intrapleural pressure. It is characterized as negative pressure when the pressure inside the pleural cavity is typically only a little bit lower than the ambient pressure.

The external intercostal muscles and diaphragm contract during inspiration, expanding the thoracic cavity. As a result, the intrapleural pressure decreases, increasing the transpulmonary pressure and expanding the lungs.

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sodium is lost from the body in the ______.

Answers

Answer: In the sweat and urine

Explanation:

Sodium is part of body's mineral. It will easily go out or lose when we we sweat and when we urinate. They lost from the body in form of water contained sodium.

calculate the percent of copper in copper oxide​

Answers

Answer:

To calculate the percent of copper in copper oxide, you would need to know the mass of copper in the compound and the mass of the compound itself. Once you have this information, you would divide the mass of copper by the mass of the compound and multiply by 100 to express the result as a percentage.

Example:

If the mass of copper in copper oxide is 40 grams and the mass of the compound is 100 grams, the percent of copper in the compound would be:

(40/100) * 100 = 40%

It should be noticed that this is an example, I don't have access to the chemical analysis of your copper oxide.

Explanation:

In the lab, chemist analyzed a sample of methanol and found that it was made of 6. 20 g of carbon, 4. 10 g of hydrogen, and 15. 90 g of oxygen. What is the percent composition of each element? Round each answer to the tenths place

Answers

The percentage composition of carbon is 19.37% and percentage of oxygen is 49.68% and percentage composition of hydrogen is 12.8%.

According to question,

6.20g of carbon, 4.10g of hydrogen and 15.90g of oxygen is present in total sample of methanol.

Total mass of methanol is=mass of carbon x 1+ mass of oxygen x 1+mass of hydrogen x 4

Total mass= 12x1+16x1+1x4

Total mass=32g

Now, to find the percentage composition of each element use the total mass and given mass of element.

The ratio of the amounts of each element to the sum of the individual element amounts present in the compound, multiplied by 100, is the definition of the percentage composition of a given compound. In this instance, the quantity is expressed in gram of the constituent ingredients.

Percentage composition[tex]=\frac{mass of an element}{total mass}*100[/tex]

Percentage composition of carbon=[tex]\frac{6.20}{32} *100[/tex]

On solving we get,

Percentage composition of carbon=19.37%

Percentage composition of oxygen=[tex]\frac{15.90}{32}*100[/tex]

On solving we get,

Percentage composition of oxygen=49.68%

Percentage composition of hydrogen=[tex]\frac{4.10}{32}*100[/tex]

On solving we get,

Percentage composition of hydrogen=12.8%

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Given that 1 kWh = 3. 6 MJ and that 1 Btu = 1055 J, show that 1 kWh = 3412 Btu.

Answers

Given that 1 kWh = 3. 6 MJ and that 1 Btu = 1055 J, It is shown that 1 kWh = 3412 Btu.

1 kilowatt (kWh) = 3.6 mega Joules (MJ)

1 British thermal unit (Btu) = 1055 Joules (J)

As we know that:

1 MJ = 1000000 J

Since

1 kWh = 3.6 x 1000000 J

Calculate for 1 J

1 J = 1 ÷ 1055 Btu

1 kWh = 3.6 x 1000000 x (1 ÷ 1055) Btu

1 kWh  = 3412.32 Btu

So it is calculated that 1 kilowatt (kWh) is equal to 3412 British thermal units (Btu).

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When using a TSO-C129 or TSO-C196 GPS for navigation and instrument approaches, any required alternate airport must have

Answers

TSO-C129 and TSO-C196 refer to non-WAAS GPS systems. TSO-C146 refers to WAAS-enabled GPS systems. If non-WAAS GPS is used for navigation and instrument approaches, all required alternate airports must have non-GPS approved operational instrument approach procedures.

TSO-C129 - Airborne Auxiliary Navigation Sensor for Global Positioning System equipment with airborne extensions. TSO-C196 – Auxiliary airborne navigation sensor for GPS units with airborne augmentation.

TSO certification means minimum performance standards for certain materials, parts and equipment used in commercial aircraft. Authorization to manufacture materials, parts, or equipment in accordance with TSO standards is referred to as TSO authorization.

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How many moles of hydrogen (H2) are required to completely reduce 1 mole of cis-2,3,3- trimethylhepta-1,5-diene

Answers

2 moles of hydrogen (H2) are required to completely reduce 1 mole of cis-2,3,3- trimethylhepta-1,5-diene (C11H16).

What is moles?

Moles, in chemistry, is a unit of measurement used to express the amount of a substance. It is equal to 6.022 x 1023 atoms, molecules, ions, or other particles. In other words, a mole contains an exact number of particles, which is known as Avogadro's number. The mole is a convenient way to measure and compare large amounts of a substance. It is also used to measure the amount of energy released or absorbed in a chemical reaction.

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How do you make the balanced equation of making ammonia?

__ N² + __ H² → __ NH³

(with steps to solve)

Answers

Answer:

1, 3, 2

Explanation:

1 mole of N^2 so you have 2 N.

3 mole of H^2 so you have 6 H.

2 mole NH^3 so you have 2 N and 6 H

2N + 6H = 2N + 6H

diatomic elements are important. what makes them different from other elemental substances?

Answers

Other elemental substances in that they consist of two atoms of the same element, bonded together.

What is Diatomic elements?

Diatomic elements are chemical elements that exist in the form of two atoms held together by covalent bonds. The most common elements that exist as diatomic molecules are hydrogen, oxygen, nitrogen, fluorine, chlorine, bromine, and iodine. These elements are found in nature and play important roles in the formation of compounds used in everyday life.

This bond is usually covalent in nature, and the two atoms form a stable molecule. This type of molecule is very stable and present in the form of gas, at room temperature and pressure. Examples of diatomic elements are hydrogen, oxygen, nitrogen, fluorine, chlorine, and bromine. Due to the fact that these elements are already in a stable, two-atom form, they exhibit different chemical and physical properties than other elements. For example, diatomic oxygen is highly reactive and can easily combine with other elements, while diatomic nitrogen is relatively inert. This difference in reactivity is due to the fact that the two atoms in the diatomic form share electrons more easily than atoms in other elemental forms.

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regardless of where you live and what tempurature it is outside, you should always start the vehicle and give it a few minutes to warm up

Answers

The statement given is true. No matter where you live or what the outside temperature is, you should always start your vehicle and let it warm up for a few minutes.

Define temperature.

An object's thermal energy content is measured by its temperature, while heat is the movement of thermal energy between objects of different temperatures.

The average kinetic energy of all the atoms or molecules that make up matter defines temperature in chemistry. Not all materials have the same kinetic energy. A particle can be described using the kinetic energy distribution of the particle at a point in time.

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The complete question is as follows:

Regardless of where you live and what temperature it is outside, you should always start the vehicle and give it a few minutes to warm up. (True/False)

absorbance is directly proportional to ___________________________.

Answers

The concentration which determines how much radiation is absorbed, increases together with the absorbance.

One factor that influences a sample's absorbance is concentration (c). It would be reasonable to suppose that more radiation will be absorbed as the concentration rises, raising the absorbance. As a result, the relationship between concentration and absorbance is straightforward.

Another component is the path length (b). The absorbance rises as the length of the radiation beam and the number of molecules in its path do as well. As a result, the concentration is inversely related to the distance traveled. As you are undoubtedly already aware from earlier experiences, a particular chemical species absorbs some wavelengths of radiation but not others.

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The complete question as follows

Why is absorbance directly proportional to concentration?

Chemical Reactions - Problems
4 NH, +5 O, → 4 NO+6H_O
Which of the following are the reactants in the reaction above?
NH,
NO
I
H₂O
Submit v
IT

Answers

Reactants are on the left side of the equation and the products are on the right side. Given that information, NH and 5O are the reactants.
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