Carbon’s valence?Thanks for answer

Answer: 1) \(2C_2H_6+7O_2\rightarrow 4CO_2+6H_2O\)

2) \(2C_4H_{10}+13O_2\rightarrow 8CO_2+10H_2O\)

3) \(2C_8H_{18}+25O_2\rightarrow 16CO_2+18H_2O\)

4)\(2C_{10}H_{22}+31O_2\rightarrow 20CO_2+22H_2O\)

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side.

The balanced chemical reactions will be:

1) Ethane + Oxygen = Carbon Dioxide + Water : \(2C_2H_6+7O_2\rightarrow 4CO_2+6H_2O\)

2) Butane + Oxygen = Carbon Dioxide + Water : \(2C_4H_{10}+13O_2\rightarrow 8CO_2+10H_2O\)

3) Octane + Oxygen = Carbon Dioxide + water: \(2C_8H_{18}+25O_2\rightarrow 16CO_2+18H_2O\)

4) Decane + Oxygen = Carbon Dioxide + Water :  \(2C_{10}H_{22}+31O_2\rightarrow 20CO_2+22H_2O\)

Answer:

0.009871

Explanation:

\( 9.871\times 10^{-3} = 0.009871\)

Answer:

.009871

Explanation:

Of the given chlorides, silver chloride (AgCl) is the least soluble at room temperature. This is due to the high lattice energy of AgCl, which is the energy required to break apart the ionic solid into individual ions in solution. The high lattice energy arises from the small size of the silver cation (Ag+) and the large size of the chloride anion (Cl-). The strong electrostatic attraction between these ions means that it requires a large amount of energy to break apart the ionic solid and solvate the ions in solution.

In contrast, mercury chloride (HgCl2) and lead chloride (PbCl2) are both more soluble at room temperature than AgCl. This is due to their lower lattice energies, which arise from the larger size of the cations and/or the smaller size of the anions. The solubility of HgCl2 and PbCl2 is also affected by the presence of other ions in solution, such as those from a salt bridge or electrolyte, which can increase the solubility by reducing the ionic strength of the solution.

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The Ni ( NO₃ )₃ is an anhydrous covalent compound.  Ni ( NO₃ )₃ is prepared by the reaction of red fuming nitric acid and nickel nitrate hemihydrate.

An electron exchange that results in the formation of electron pairs between atoms is known as a covalent bond. Bonding pairs or sharing pairs are the names given to these electron pairs. Covalent bonding is the stable equilibrium of the attractive and repulsive forces between atoms when they share electrons.

At room temperature, covalent compounds can be found in all three of their physical states and often have low boiling and melting temperatures. Because covalent compounds lack charged particles with the ability to carry electrons, they do not conduct electricity.

Two atoms sharing a pair of electrons make a covalent connection. Because the electron pair is drawn to both nuclei, the atoms are kept together.

Thus, The Ni ( NO₃ )₃ is an anhydrous covalent compound.

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The largest initial ionization energy belongs to Helium. It is the first member of the noble gas group in the periodic table and is a colorless, odorless, tasteless, inert, monatomic gas.

Helium is used as a coolant in nuclear reactors, in compressed air tanks, and in lasers. Of all the elements, Helium has the lowest melting and boiling points.

A typical carrier gas for gas chromatography is Helium. It can be used to determine the age of rocks and minerals that contain uranium and thorium.

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Percent Yield = (153.2 / 167.5) x 100 = 91.46% Therefore, the percent yield of the reaction is 91.46%. The correct answer is d) 91.46%.

To calculate the percent yield, we need to compare the actual yield (the amount of product obtained in the laboratory) with the theoretical yield (the amount of product that would be obtained if the reaction proceeded perfectly).

The percent yield can be calculated using the formula:

Percent Yield = (Actual Yield / Theoretical Yield) x 100

In this case, the actual yield is given as 153.2 grams and the theoretical yield is given as 167.5 grams.

Using the formula:

percent Yield = (153.2 / 167.5) x 100 = 91.46%

Therefore, the percent yield of the reaction is 91.46%.

The correct answer is d) 91.46%.

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Answer:

The temperature will be 189.70 K.

Explanation:

Ideal gases are a simplification of real gases that is done to study them more easily. It is considered to be formed by point particles, do not interact with each other and move randomly. It is also considered that the molecules of an ideal gas, in themselves, do not occupy any volume.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:  

P*V = n*R*T

where P is the gas pressure, V is the volume that occupies, T is its temperature, R is the ideal gas constant, and n is the number of moles of the gas. The universal constant of ideal gases R has the same value for all gaseous substances.

In this case:

Replacing:

2 atm* 35 L= 4.5 moles* 0.082 \(\frac{atm*L}{mol*K}\) * T

Solving:

\(T=\frac{2 atm* 35 L}{4.5 moles* 0.082\frac{atm*L}{mol*K} }\)

T= 189.70 K

The temperature will be 189.70 K.

The minimum amount of oxygen required for the complete combustion of 20cm³ of CO and 20cm³ of H₂ would be 20.16 cm³ at STP.

The balanced chemical equation for the combustion of CO and H2 is:

CO + 1/2O2 → CO2

H2 + 1/2O2 → H2O

From the equation, we can see that one mole of CO requires 1/2 mole of O2, while one mole of H2 requires 1/2 mole of O2.

From the balanced equation, we can see that each mole of CO requires 1/2 mole of O2, while each mole of H2 requires 1/2 mole of O2.

Therefore, we need 0.00083/2 = 0.00042 moles of O2 for the combustion of CO and the same amount for the combustion of H2.

The total amount of O2 required is the sum of the amounts needed for each reactant:

Therefore, the minimum amount of oxygen required for the complete combustion of 20 cm³ of CO and 20 cm³ of H2 is approximately 20.16 cm³ at STP.

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Answer:

The positive charge resides on the nucleus of the atom, which is where the protons are located. However, a positive charge is created by losing an electron from an orbital which is obviously outside the nucleus of the atom.

Explanation:

Particles is a gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern....

I hope you got it

There is no statement that is not true about β-sheets in the given options. Option D is correct.

β-sheets are a common structural motif in proteins, characterized by the arrangement of multiple beta strands connected by hydrogen bonds. β-strands are stretches of peptide backbone that are nearly fully extended, forming a zigzag conformation, and they can be either parallel or antiparallel.

The arrangement of β-strands and their directionality determine the overall structure and stability of the β-sheet. β-sheets are important for protein stability, function, and recognition, and they play critical roles in many biological processes.

Beta sheets are formed by the two or more beta strands connected by the hydrogen bonds, and can be arranged in either parallel or antiparallel configurations.

Hence, D. None of the above (they are all true) is the correct option.

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Answer:

\( \huge \color{indigo} \boxed{a. \: aldehyde}\)

Explanation:

Pentanal is considered to be a fatty aldehyde lipid molecule. These are compounds containing more than one aldehyde group. Pentanal is a very hydrophobic molecule, practically insoluble in water, and relatively neutral.

Step 5 will be to measure the final temperature of the water.

To gauge temperature, we rely on thermometers. These devices serve as indispensable tools for obtaining accurate readings. Generally manufactured using glass or plastic, they possess a scale marked off in either degrees Celsius or Fahrenheit for registering the measured values.

Their versatility permits them to be used for assorted purposes like determining atmospheric and aquatic temperatures and food temperatures as well. In addition to this, they are instrumental in detecting health conditions by aiding the measurement of human body heat.

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Answer:

Option D. Saturated alkane

Explanation:

To know which option is correct, it is important that we know what saturated and unsaturated compounds are in this context.

Saturated hydrocarbons are compounds which has only carbon to carbon single bonds (C–C) in its chain. A very good example of such compound is the Alkanes.

Unsaturated hydrocarbons are compounds which has either a carbon to carbon double bond (C=C) or a carbon to carbon triple bond (C≡C) in its chain. Examples of such compounds include alkenes and alkynes.

Now, let us answer the question given above bearing the meaning of saturated and unsaturated compounds in mind.

The compound given above contains only carbon to carbon (C–C) single bond.

Therefore, the compound is a saturated alkane.

The distance between the two will be 0.118m

A proton's mass is specified as m = 1.67 10 27.k \sg

The formula for a proton's charge is q = 1.6 10^19C

Allow r to represent the distance between the two protons.

The weight of a proton on Earth is equivalent to the electric force of repulsion:

kq^2/r^2 = mg

(2.3×10^−28)/r^2 = 1.64×10^−26

r^2 = (2.3×10^−28)/1.64×10^−26

r = 0.118m

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Oxygen, Magnesium, Iron, and Silicon are the set of elements that makes up 95% of the Earth. Among these Oxygen is the most abundant element, comprising about 47% of the Earth's mass.

These four elements make up approximately 95% of the Earth's composition. Oxygen is the most abundant element, comprising about 47% of the Earth's mass. Magnesium, Iron, and Silicon are also significant constituents, with Magnesium accounting for about 27%, Iron for approximately 6%, and Silicon for around 8% of the Earth's composition.

While Carbon is indeed an essential element for life and is present in various forms on Earth, its abundance in the Earth's overall composition is relatively low compared to Oxygen, Magnesium, Iron, and Silicon. Hydrogen and Helium, mentioned in option D, are lighter elements and are more prevalent in the composition of the Sun and other celestial bodies, rather than the Earth itself.


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Answer: The new temperature of container is 123 K.

Explanation:

Given: \(P_{1}\) = 795 mm Hg,     \(T_{1}\) = 273 K

\(P_{2}\) = 358 mm Hg,          \(T_{2}\) = ?

Formula used to calculate the new temperature is as follows.

\(\frac{P_{1}}{T_{1}} = \frac{P_{2}}{T_{2}}\)

Substitute the values into above formula as follows.

\(\frac{P_{1}}{T_{1}} = \frac{P_{2}}{T_{2}}\\\frac{795 mm Hg}{273 K} = \frac{358 mm Hg}{T_{2}}\\T_{2} = 123 K\)

Thus, we can conclude that the new temperature of container is 123 K.

Answer:

3-methyl pentane

Explanation:

The longest chain of carbons is 5, so it will have the prefix pent-.

The first branch is on the 3rd carbon, and it is a 1 carbon branch. This means the branch will be called 3-methyl.

Now to find the suffix we need to count the carbons and the hydrogens. There are 6 carbons and 14 hydrogens, which follows the formula for an alkane (\(C{_n}H{_{n+2}}\)). This gives it the suffix -ane.

Now we can name the compound:

3-methyl pentane

That is the answer

- Kan Academy Advance

For example, salts of sodium, potassium and ammonium are usually soluble in water. Notable exceptions include ammonium hexachloroplatinate and potassium cobaltinitrite. Most nitrates and many sulfates are water-soluble

Answer:

Explanation:

Answer:

Answer is in the attachment

hope it's helpful

Answer:

animals

Explanation:

I think I remember this from a quiz I took so exotic species

When a mix of unconsolidated materials falls from a cliff, a rockfall occurs.

A rockfall is a type of landslide that happens when rocks, boulders, or fragments fall from a steep slope. Rockfalls are usually triggered by heavy rain, freeze-thaw cycles, earthquakes, and other factors that weaken the stability of a slope.

Rockfalls can cause a variety of issues, ranging from minor property harm to major loss of life. Falling rocks from a height can create a high-speed and high-velocity effect. This effect can result in serious injury, and in some situations, death. Therefore, rockfalls are considered to be very dangerous.

Rockfalls occur when a slope's rocks and soil are destabilized. The following factors contribute to the occurrence of rockfalls:

Rockfalls can cause severe damage, injury, or death. Rocks tumbling down from heights can cause extensive damage to structures, property, and infrastructure, as well as endanger people's lives. Rockfalls can also result in landslide events, which can have devastating consequences. Therefore, it is critical to keep an eye on slopes and cliffs, particularly those in urban areas, to reduce the risk of rockfalls.

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Hydrogen bonds are a particular kind of dipole-dipole interaction because they happen when H and an electronegative atom engage, the electronegative atom produces the dipole, and the shared electrons are distributed unevenly between the H and the other atom.

Atoms are the tiniest piece of common material that make up a chemical element. Each neutral or ionized atom makes up a solid, liquid, gas, or type of plasma. Atoms are very small, with an average diameter of 100 picometers.

The three fundamental types of particles that make up an atom are protons, electrons, and neutrons.

John Dalton

The contemporary atomic idea was initially started by the eminent chemist John Dalton (1766–1844). But his atom was like a rock-solid cue ball.

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Answer:

C.H2O has the highest boiling point.

I am not totally sure.

Hope it help you.

Answer:

true

Explanation:

Calorimetry is used to measure the amount of thermal energy transferred in a chemical or physical process. This requires careful measurement of the temperature change that occurs during the process and the masses of the system and surroundings.

hope that helps!

please follw/mark brainiest <3

A trisaccharide is formed by linking three monomers of the sugar C5H10O5 through dehydration reactions.

The formula of this trisaccharide is dependent on the specific arrangement of the monomers and their glycosidic bonds.

The sugar C5H10O5, also known as pentose, can be found in many biological molecules such as nucleic acids and certain carbohydrates. When three monomers of this sugar are brought together and undergo dehydration reactions, a trisaccharide is formed. Dehydration reactions involve the removal of a water molecule to form a new bond between monomers.

The formula of the trisaccharide will depend on the specific arrangement of the monomers and the type of glycosidic bond that forms between them. Glycosidic bonds can link monomers in different orientations, resulting in different types of trisaccharides. For example, if the three monomers are linked in a linear fashion, the trisaccharide may have a formula such as C15H26O13. However, if the monomers are linked in a branched fashion, the formula may be different.

Overall, the formula of a trisaccharide made from three C5H10O5 monomers will depend on the specific arrangement of the monomers and the type of glycosidic bond formed between them.

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Answer:

It is broken down into water and oxygen

Explanation:

2H2O2 -----> 2H2O +O2

A is the initial reaction when a chlorine bond splits into two chlorine radicals.

In chemistry, a radical is an atom, molecule, or ion that has an unpaired valence electron.

The question is based on Radical Chain Reaction. And these reactions have three different phases: Initiation, Propagation and Termination.

Reaction A- Initiation

Reaction B- Termination

Reaction C- propagation

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Using the ideal gas law PV =nRTPV=nRT , we find that the pressure will be P =\frac{nRT}{V}P=

V

nRT

​

 . Then, we'll substitute and find the pressure, using T = -25 °C = 248.15 K and R = 0.0821 \frac{atm\cdot L}{mol \cdot K}

mol⋅K

atm⋅L

​

 :

P =\frac{nRT}{V} = \frac{(0.33\,\cancel{mol})(0.0821\frac{atm\cdot \cancel{L}}{\cancel{mol \cdot K}})(248.15\,\cancel{K})}{15.0\,\cancel{L}} = 0.4482\,atmP=

V

nRT

​

=

15.0

L

​

(0.33

mol

)(0.0821

mol⋅K

atm⋅

L

​

​

)(248.15

K

​

)

​

=0.4482atm

In conclusion, the pressure of this gas is P=0.4482 atm.

Reference:

Chang, R. (2010). Chemistry. McGraw-Hill, New York.