Calculate the molar mass of CC14

Hydrogen is able to bond with itself hydrogen doesn't obey the rule of octet because it requires only 2 electrons to have its outer shell filled and gain stability.

so the bond is formed when the 2 atoms come closer  and their electrons are attracted to the proton of the other atoms hence bonding covalently

covalent bond is a type of bond in which a chemical bond that involves the sharing of electrons to form electron pairs between atoms

Helium cannot form covalent bonds this is because it has a complete shell of electrons and in this state, the atom cannot readily accept any additional electrons or join with any element or atoms to make a bond also the gas is a noble its valence shell is full and it gains no stabilizing effect forming covalent bonds.

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Dynamic equilibrium can be defined as rate of dissolution = rate of deposition. So, option D is correct.

Once a reversible reaction takes place in chemistry, a dynamic equilibrium is present. There is no net change because substances transition equally between reactants and products. The rate at which reactants and products form ensures that neither of their concentrations change. It is an example of a system that is in a constant state specifically.

An equation's equilibrium can be altered and pulled out of dynamic equilibrium by altering the temperature, pressure, or concentration of a reaction. This is the reason why if you open a Coke can and leave it outside for a while, it will ultimately turn "flat" and no longer have any bubbles. This is due to the fact that the soda can is no longer a closed system and the carbon dioxide is now free to interact with the environment. This throws it out of dynamic equilibrium and lets out carbon dioxide gas until there are no bubbles left.

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The complete question is:

Dynamic equilibrium can be defined as:

A) rate of bubbling > rate of dissolving

B) rate of dissolution > rate of deposition

C) rate of dissolution < rate of deposition

D) rate of dissolution = rate of deposition

There are six different tripeptides that can be assembled using one molecule each of the amino acids glycine, glutamic acid, and lysine.

Amino acids are organic molecules that are the building blocks of proteins. There are 20 different types of amino acids commonly found in proteins. A tripeptide is a chain of three amino acids linked together by peptide bonds. The order of the amino acids in the chain is important because it determines the structure and function of the protein. Each amino acid has a different chemical structure and properties, which means that different combinations of amino acids can produce different proteins.

To calculate the number of possible tripeptides that can be assembled from three amino acids, we need to consider the number of possible ways to arrange the amino acids in the chain. In this case, we have three amino acids: glycine, glutamic acid, and lysine. The order of the amino acids in the tripeptide is important, so we need to consider all possible permutations. There are six possible ways to arrange three items: G-E-K, G-K-E, E-G-K, E-K-G, K-G-E, K-E-G.

Therefore, there are six different tripeptides that can be assembled using one molecule each of the amino acids glycine, glutamic acid, and lysine. However, since some of these combinations are the same, the total number of unique tripeptides is 6.

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The amount of the heat in kJ , would be involved in the condensing 12.9v g of the CH₃OH  is the 15.2 kJ.

Given that :

The mass of the CH₃OH = 12.9 g

The ΔH = 38 kJ/mol

The molar mass = 32 g/mol

The number of the moles = mass / molar mass

The number of the mole = 12.9 / 32

                                         = 0.403 mol

The number of the moles is 0.403 mol

The amount of the heat is given as  :

Q = n ΔH

Q = 0.403 × 38

Q = 15.2 kJ.

Thus, the amount of the heat is 15.2 kJ.

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Explanation:

The Sun is Earth’s major source of energy, yet the planet only receives a small portion of its energy and the Sun is just an ordinary star. Many stars produce much more energy than the Sun

For an FCC crystal: calculate the density of atoms (atoms/a² where a is the lattice constant) for the (100), (110) and (111) planesThe unit cell of a FCC crystal is shown below:Here, each corner atom contributes 1 atom, and each face atom contributes 1/2 atoms.

For (100) plane:Length of unit cell along (100) plane direction = a Density of atoms = No. of atoms / Area of the plane Area of the plane = a²Density of atoms for (100) plane = 4 / a²For (110) plane:Length of unit cell along (110) plane direction = a√2Density of atoms = No. of atoms / Area of the plane Area of the plane = a x a√2Density of atoms for (110) plane = 2 x 2 / (a x a√2) = 4√2 / a²

For (111) plane:Length of unit cell along (111) plane direction = a√3Density of atoms = No. of atoms / Area of the plane Area of the plane = a²√3/2 Density of atoms for (111) plane = 3 x 4 / (a²√3) = 4√3 / a²Hence, the density of atoms for the (100), (110) and (111) planes in an FCC crystal are as follows:For (100) plane: 4 / a²For (110) plane: 4√2 / a²For (111) plane: 4√3 / a².

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Answer: Ernest Z. The concentration would be 0.76 mol/L.

The substance heats up relatively quickly means less energy needed for the rise in temperature. Therefore, the substance is having low specific heat.

Of all liquids, water has the highest specific heat capacity. The amount of heat that one gram of a substance needs either absorb or lose in order to change its temperature by one degree Celsius is known as specific heat. A compound with "low specific heat" will raise its temperature considerably more quickly than a compound with "high specific heat." J/kg C or J/g C are the units for specific heat. While substances with (high or low) particular heats will be more challenging to heat up, substances with (high or low) specific heats will heat up readily.

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Answer:

3

Explanation:

Applying,

\(2^{n'}\) = R/R'............... Equation 1

Where n' = number of halflives that have passed, R = Original atom of the substance, R' = atom of the substance left after decay.

From the question,

Given: R = 40 atoms, R' = 5 atoms

Substitute these values into equation 1

\(2^{n'}\) = 40/5

\(2^{n'}\) = 8

\(2^{n'}\) = 2³

Equation the base,

n' = 3

Answer:

1) AgNO3 (aq) + KCl (aq) -> AgCl (s) + KNO3 (aq)

Ag+ (aq) + NO3- (aq) + K+ (aq) + Cl- (aq) -> AgCl (s) + K+

(aq) + Cl- (aq)

Ag+ (aq) + Cl- (aq) -> AgCl (s)

2) 2NaCl (aq) + K2CO3 (aq) -> Na2CO3 (aq) + 2KCl (aq)

3) Fe(NO3)3 (aq) + 3NaOH (aq) -> Fe(OH)3 (s) + 3NaNO3

(aq)

Fe³+ (aq) + 3NO3- (aq) + 3Na+ (aq) + 3OH- (aq) ->

Fe(OH)3 (s) + 3Na+ (aq) + 3NO3- (aq)

Fe³+ (aq) + 3OH- (aq) -> Fe(OH)3 (s)

4) BaBr2 (aq) + Na2SO4 (aq) -> BaSO4 (s) + 2NaBr (aq)

Ba²+ (aq) + 2Br- (aq) + 2Na+ (aq) + SO4²- (aq) ->

BaSO4 (s) + 2Na+ (aq) + 2Br- (aq)

Ba²+ (aq) + SO4²- (aq) -> BaSO4 (s)

Explanation:

Sorry, I couldn't make the charges superscript. Don't know how.

On #2, no reaction occurs; everything stays aqueous.

Answer:the tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.

Explanation:

Answer

Given the following reaction: NH4HS (s) ⇌ NH3 (g) + H2S (s). If Kp = 0.25, then P(NH3) at equilibrium will be: *

The length of the wire is approximately 53.9 feet.

To find the length of the wire, we can use the trigonometric relationship of the angle of elevation.

Given:

Height of the pole (vertical side) = 45 feet

Angle of elevation (opposite side) = 39º

We can use the trigonometric function tangent (tan) to relate the height of the pole and the length of the wire.

Tangent of the angle of elevation (tanθ) = Height of the pole / Length of the wire

tan(39º) = 45 / Length of the wire

Rearranging the equation to solve for the length of the wire:

Length of the wire = Height of the pole / tan(39º)

Substituting the values:

Length of the wire = 45 / tan(39º)

Calculating this using a calculator or trigonometric table, we find:

Length of the wire ≈ 53.9 feet

Therefore, the length of the wire is approximately 53.9 feet when rounded to the nearest tenth.

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The regiochemistry of hydroboration/oxidation of alkenes is (a) Markovnikov.

The hydroboration/oxidation reaction follows Markovnikov's rule, which states that the electrophile (in this case, the boron atom) adds to the carbon atom of the double bond that has the greater number of hydrogen atoms attached to it. The regioselectivity of the reaction is determined by the relative stability of the carbocation intermediates formed during the reaction.

In hydroboration, the boron atom adds to the less substituted carbon atom of the double bond, leading to the formation of a boron-alkyl bond and a boron-hydrogen bond. Subsequently, in the oxidation step, the boron-alkyl bond is replaced with an alcohol group (-OH) while maintaining the regiochemistry established during hydroboration.

Therefore, the regiochemistry of hydroboration/oxidation of alkenes is Markovnikov, where the electrophilic addition occurs preferentially at the carbon atom of the double bond that has the greater number of hydrogen atoms attached to it.

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The mass of the mixture is 95.8 g and the percentage by mass of cyclohexane in the mixture is 81.33%.

To calculate the percentage by mass of cyclohexane in the mixture, you need to use the formula:

Percentage by mass = (mass of component / total mass of mixture) × 100

Given that you have a mixture of cyclohexane and water and the density of the mixture is 0.958 g/mL,

1. To determine the mass of the mixture, you need to know the volume of the mixture and the density of the mixture. Since the density of the mixture is given, you can use the following formula to determine the mass of the mixture:

mass of mixture = density of mixture × volume of mixture

The mass of the mixture is: mass of mixture = 0.958 g/mL × 100 mL = 95.8 g

2. Since the density of cyclohexane is given as 0.779 g/mL, you can use the following formula to determine the mass of cyclohexane:

mass of cyclohexane = density of cyclohexane × volume of cyclohexane = 0.779 g/mL × 100 mL = 77.9 g

3. Using the formula given above, you can calculate the percentage by mass of cyclohexane in the mixture:

percentage by mass of cyclohexane = (mass of cyclohexane / mass of mixture) × 100

percentage by mass of cyclohexane = (77.9 g / 95.8 g) × 100 = 81.33%

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Answer:

It's simple substitution reaction and there is no balance for the equation. It's right written.

Explanation:

The initial concentration of the monoprotic weak acid solution (pka = 4.2) ` has a pH value of 3.4 is : 0.0025 M.

The pH value = 3.4

The pka value = 4.2

The monoprotic acid is given as follows :

HA   ---->   H⁺  +  A⁻

The pH expression is given as :w

pH = 1/ 2 [ pka - loga]

where,

pka = 4.2

pH = 3.4

3.4 = 1/2 [ 4.2 - loga]

6.8 = 4.2 - log a
2.6 = - log a

a =  10^-2.6

a = 0.0025 M

The initial concentration of a monotropic acid is 0.0025 M.

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Answer:

combustion is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.

Answer:

See explanation

Explanation:

The number of electrons in each principal energy shell increases as the number of shells increases because more electronic orbitals become available to accommodate the electrons.

For instance, the n= 2 level only accommodates eight electrons in the s and p orbitals whereas the n=3 level accommodates 18 electrons in s, p and d orbitals respectively.

Each principal level accommodates 2n^2 electrons where n= the principal energy shell.

The increase in the number of shell leads to increase in the number of electrons.

The number of electrons in each principal energy shell increase as the number of the shell increases because each cell can accommodate 8 electrons except the first shell which has only 2 electrons. The number of electrons increases when we go down the group due to addition of new shells.

The atom added new shells in the atom if the existing shells fill with electrons and no place is available for the remaining electrons so we can conclude that the increase in the number of shell leads to increase in the number of electrons.

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The planet's albedo has ability to reflect light.

The planetary albedo would be the percentage of incoming solar radiation that Earth scatters back into space. The processes that control the quantity, distribution, and fluctuation of this reflected energy are crucial to the Earth's energy balance and have a significant impact on both climate including climate change.

Temperatures rise as a result of carbon dioxide, prolonging the growing season as well as raising the humidity. Each of these elements has stimulated some further plant growth. But hotter weather also stresses plants. Plants require more water to live in an extended, warmer growing season.

Therefore,  the planet's albedo has ability to reflect light.

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Answer:

For the second to last problem the coefficients is  1, 5, 3, and 4 and the last problem all the coefficients are 1's

Explanation:

For the second to last problem you put 3 next to CO₂ so C is 3 on both sides. Then you put 4 next to H₂O because H will then be 8 on both sides. Lastly you put 5 next to O₂ which will make 10 on the reactant side. On the product side the 3 next to CO₂ will make O on the product side 6 and the 4 next to H₂O will make O on the product side 4. You will then add both together and it will make 10, which will make 10 on both sides. Hope this helps!

Answer:

The above statement is False

As a result, the gas will be about 205 kelvin, or -68.5 degrees Celsius, in temperature.

If a gas's temperature is increased to 927°C, so its pneumatic cylinder will be. A gas has a temperature of 127°C at 2 atm and 2 litres of volume. O 6 atm.

One mole ($6.023 times 1023 typical particles) of the any gas at STP takes up 22.4L of space. A mole of any gas takes up 22.4 litres at standard pressure and temperature (273K and 1atm).

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An excitatory postsynaptic potential (EPSP) occurs when neurotransmitters bind to receptor proteins present in the postsynaptic membrane of a synapse. This leads to depolarization of the membrane potential, making it more likely that an action potential will be generated at the axon hillock of the neuron.

EPSPs occur when neurotransmitters bind to receptor proteins present in the postsynaptic membrane of a synapse. This leads to depolarization of the membrane potential, making it more likely that an action potential will be generated at the axon hillock of the neuron. EPSPs are the primary means by which information is transmitted between neurons in the brain, and they play a critical role in shaping neural circuits.

EPSPs are most commonly associated with glutamate, which is the primary excitatory neurotransmitter in the brain. When glutamate is released by a presynaptic neuron, it binds to AMPA receptors on the postsynaptic membrane, which leads to the influx of positively charged ions such as sodium and calcium. This depolarizes the postsynaptic membrane, and if the depolarization is strong enough, it can trigger the generation of an action potential.

EPSPs can also occur with other excitatory neurotransmitters, such as acetylcholine and dopamine. These neurotransmitters bind to different types of receptors on the postsynaptic membrane, which can lead to a variety of different effects. For example, acetylcholine can bind to nicotinic receptors or muscarinic receptors, which can have different downstream effects on the postsynaptic neuron.

In summary, EPSPs are a critical component of neural communication, and they occur when neurotransmitters bind to receptors on the postsynaptic membrane of a synapse. Glutamate is the primary excitatory neurotransmitter, but other neurotransmitters can also lead to EPSPs depending on the receptor type.

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At chemical reaction lunchtime, Steve measures his top speed in kilometers per hour and discovers that his pedometer recorded a top speed of 102.7 cm/s.

In order to count steps and determine the distance traveled, pedometers are made to recognize vertical hip movement. to generate the bulk of our energy . They are unable to offer data on the temporal pattern of physical activity or the length of time spent engaging in various activities of various intensities.

Pedometers, commonly referred to as step counters, are excellent tools for encouraging you to move more. widespread use of reactions for testing and identifying It's not necessary to purchase a pricey pedometer with numerous extra capabilities, such as a calorie counter and a heart rate monitor.

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Answer: 4 ATP molecules is produced in the glycolysis of 2 glucose molecules

The first stage of most carbohydrate catabolism, which is described as the breakdown of larger molecules into smaller ones, is glycolysis, which is a part of cellular respiration. Two Greek words that mean "to break down anything sweet" are the source of the word glycolysis. Two molecules of ATP are created during the breakdown of glucose and formation of pyruvate during glycolysis.

Explanation:

2 ATP are produced.

For every glucose molecule, meaning that for every 2 glucose molecules, 4 ATP will be created.

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Answer:

As you begin your trip down the hill you increase your speed resulting in a transformation from potential energy to kinetic energy.

Explanation:

At the top of the mountain, you have potential energy. But as you start moving down the mountain, your speed increases and have a lot of kinetic energy.

The oxidation state of Ca in CaSO₄ is +2. The charge of the whole group SO₄ is -2. The charge of S is +6 and that of O is -2.

The oxidation state of a species is the numerical charge it possess. Thus, it is the number of electrons the element lost or gained. The total charge of a compound will be zero and every compound tends to exist as neutral.

The total charge of the compound CaSO₄ is zero and that of SO₄ is -2. Hence, to neutralize that Ca lose 2 electrons and form in +2 oxidation state.

The charge of one oxygen is -2. Here we have 4 oxygens and the total charge of all oxygens is -8 in the group SO₄.

Now, the charge of S = (-2) - (-8) = +6. Hence, the oxidation state of sulphur is +6.

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When human activities release excessive amounts of carbon dioxide and other greenhouse gases into the atmosphere, then atmosphere is most greatly impacted.

Greenhouse gases are gases the in the atmosphere of Earth that trap heat.

The greenhouse gases trap heat in the atmosphere and contribute to the phenomenon of global warming, which has numerous negative effects on the climate and environment.

Excessive greenhouse gas emissions can cause rising global temperatures, more frequent and severe weather events, sea level rise, ocean acidification, and other environmental changes that have significant impacts on ecosystems, agriculture and human societies. Therefore, it is important to reduce greenhouse gas emissions to mitigate the impacts of the climate change.

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The weight of fat is 24.27 pounds of a 74 kg athletes.

15% by mass means 15 g of fat is present in 100g of mass.

Convert kg into grams

1 kg = 1000 gram

74 kg = 74000 g

Now,

Mass of body = \(\frac{74000 g \times 15\ g}{100}\)

                      = 740 × 15

                      = 11100 g

Convert g into kg

11100 g = 11.1 g

Convert kg into pounds

1 kg = 2.205 pounds

11.1 kg = 11.1 × 2.205

          = 24.47 pounds

Thus from above conclusion we can say that the weight of fat is 24.27 pounds of a 74 kg athletes.

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