Carbonyl C atoms (shown Red) : We can see both these C are bonded to 3 other atom and there is one C=O which is having 1 pi and 1sigma bond. These C atoms bonded to other 3 atoms with 3 sigma bond and 1 pi bond. 3 sigma bonds are formed using sp2

Answer:

false

Explanation:

first of all;-energy lead to an indotermic reaction.

indotermic is a reaction that absorbs energy \

*it has positive enthalpy of reaction

*Heat content of product is greater than that of reactant

*Heat is added to reactant side

example;- CO^2+2H^2+891kj --------- CH4 +2O2

The balanced chemical equation for the precipitation reaction that occurs when aqueous solutions of manganese(ii) chloride and potassium carbonate are combined is equals to the 2Cr³⁺ (aq) + 3 CO₃²⁻ → Cr₂(CO₃)₃(s).

Balanced Chemical Equation : If the species present in the reactants side and the products side separated by a right arrow contains equal number of atoms of all the type is known as the balanced chemical equation. The precipitation reaction that occurs when aqueous solutions of chromium (III) bromide and potassium carbonate are combined. First, we will write the molecular chemical reaction:

CrBr₃ (aq) + K₂CO₃(aq) → Cr₂(CO₃)₃(s) + KBr(aq)

Balanced chemical equation :

2CrBr₃ (aq) + 3K₂CO₃(aq) → Cr₂(CO₃)₃(s) + 6KBr(aq)

Balanced ionic chemical equation :

2Cr³⁺ (aq) + 6 Br⁻(aq) + 6 K⁺(aq) + 3 CO₃²⁻ → Cr₂(CO₃)₃(s) + 6K⁺(aq) + 6Br⁻(aq)

Net ionic equation:

2Cr³⁺ (aq) + 3 CO₃²⁻ → Cr₂(CO₃)₃(s)

Hence, the required balanced equation is 2Cr³⁺ (aq) + 3 CO₃²⁻ → Cr₂(CO₃)₃(s).

To learn more about balanced chemical equation, refer :

https://brainly.com/question/26694427

#SPJ4

Answer:

The most common drinking water contaminants are microorganisms, nitrate, and arsenic.

Explanation:

Answer:

it is chemical , sewage , factory pollution , wastes, etc

After a massive star's hydrogen is depleted in the core, it will start to use helium as nuclear fuel. The helium will undergo fusion reactions to create heavier elements, such as carbon and oxygen.

This process continues until the core of the massive star becomes predominantly made up of iron, which cannot undergo fusion reactions to release energy. At this point, the core collapses and a supernova explosion occurs, releasing a vast amount of energy and scattering the star's material into space. In this process, the core contracts and heats up, allowing helium to undergo nuclear fusion and produce heavier elements such as carbon and oxygen. This occurs because the massive star has exhausted its hydrogen supply in the core and needs to find another source of energy to maintain its stability.

Learn more about nuclear fuel : https://brainly.com/question/3983718

#SPJ11

Answer:(c)

Explanation:

Answer:

Explanation:mckxmmxkmsskkskskskxisisisisisisisks

To calculate the equilibrium constant (K) at 298 K for the reaction involving strontium sulfate (SrSO4), we need the balanced chemical equation.

SrSO4(s) ⇌ SrO(s) + SO2(g)

In this reaction, strontium sulfate decomposes into strontium oxide and sulfur dioxide. Now, let's proceed with the calculation of K at 298 K.

The equilibrium constant (K) is defined as the ratio of the concentrations (or partial pressures for gases) of the products to the concentrations (or partial pressures) of the reactants, with each raised to the power of their respective stoichiometric coefficients.

K = [SrO] / [SrSO4] * [SO2]

Since we are dealing with pure solids, their concentrations remain constant and can be omitted from the equilibrium expression. Thus, the expression simplifies to:

K = [SO2]

Now, we need to determine the concentration of sulfur dioxide (SO2) at equilibrium. This can be done using the ideal gas law, assuming the reaction takes place in a gaseous phase.

PV = nRT

Where:

P = pressure of the gas

V = volume of the gas

n = number of moles of the gas

R = ideal gas constant

T = temperature in Kelvin

Given that the temperature is 298 K and assuming a pressure of 1 atm, we can rearrange the equation to solve for n/V:

n/V = P / RT

Now, let's assume an arbitrary pressure, let's say P = 1 atm, and calculate n/V using the ideal gas law.

n/V = (1 atm) / (0.0821 L·atm·mol⁻¹·K⁻¹ * 298 K)

≈ 0.0409 mol/L

Therefore, the concentration of sulfur dioxide ([SO2]) at equilibrium is approximately 0.0409 mol/L.

Finally, we can substitute this value into the equilibrium expression:

K = [SO2]

= 0.0409 mol/L

Hence, at 298 K, the equilibrium constant (K) for the given reaction is approximately 0.0409.

To learn more about  strontium

https://brainly.com/question/530542

#SPJ11

Answer:

Radium Nitride

A radioactive element is radium. See what "radioactive" actually means.

Atoms make up the elements. Since most atoms are stable, they do not change over time. However, some of the heaviest atoms disintegrate and transform into different types. "Radioactivity" is the term for this breakdown or disintegration.

Each radioactive element releases rays that decay or disintegrate at a specific pace. There is no known way to speed up or slow this rate. Some changes happen quickly, some take longer, but no matter what, man cannot control the action.

In the case of radium, this decay would continue indefinitely until the radioactive material was ultimately converted to lead. For instance, in 1,590 years, half a gram of radium would transform into atoms with a lower atomic weight. Half of the remaining radium would transform after an additional 1,590 years, and so on until all of it turned into lead.

Attachment #1:

This is a revigator. It is a pot that was created specifically with radium, uranium, and other radioactive materials to contain water. When radioactivity was first discovered in 1912, people thought it was beneficial and "magical," similar to how homeopathic treatments are now. They would store water in it to allow it to absorb radiation, then they would drink the water. In the 1930s, several gadgets were subsequently recalled.

The enigmatic new radioactive elements captivated people's curiosity during the early 1900s. Although this starch didn't actually contain radium, it was given that name because of the rarity and beauty of radium. It was once thought of similarly to how titanium is now.

Madame Curie and her husband, Pierre Curie, made the discovery of radium. They were processing a ton of pitchblende, an ore that contains uranium. Although they were aware that the uranium was emitting invisible rays, they had the impression that there was another another, far more potent chemical present. They initially discovered polonium, another radioactive element, before successfully isolating a minute particle of radium.

The three types of rays that radium emits are alpha, beta, and gamma rays. Helium gas contains swiftly moving particles called alpha rays. In beta rays, the electrons move quickly. Gamma rays are similar to X-rays but typically more invasive. Every time one of these rays is emitted, its parent atom transforms into a different element. "Atomic transmutation" is the term for this transformation.

Hope this helps!

Cheers

>> ROR

Explanation:

Hydrogen bonding! Each hydrogen atom with a high charge density forms bonds with lone pairs on oxygen atoms. These bonds require a lot of energy to break giving water a relatively high boiling point.

Hydrogen bonding is the strongest forces of attraction between the molecule. Water has  unusually high boiling point because of hydrogen bonding.

Boiling point is the temperature at which a liquid's internal pressure equals the external pressure imposed by the liquid's vapour; in this situation, the addition of heat causes the liquid to turn into vapour without rising the temperature.

A liquid partially vaporizes into the space above it at any temperature up till the vapour the liquid's pressure at a certain temperature, which is a characteristic value. Water has  unusually high boiling point because of hydrogen bonding. Hydrogen bonding is the strongest forces of attraction between the molecule.

Therefore, Water has  unusually high boiling point because of hydrogen bonding.

To learn more about boiling point, here:

https://brainly.com/question/14771622

#SPJ6

Answer:

the rate of heat transfer is directly proportional to the mass flow rate.

Explanation:

There is an elementary equation from basic thermodynamics that states that the rate of heat transfer (Q) equals the mass flow rate (M) times a Constant (the specific heat of water) times the Delta T (fluid temp out minus fluid temp in): Q = M x C x Delta T In other words, the rate of heat transfer is directly proportional to the mass flow rate.

Yes, temperature does have an effect on the solubility of organic solids in a solvent. As temperature increases, the solubility of organic solids generally increases as well.

Effect of temperature on solubility of organic solids in a solvent is as follows :-

Generally, the solubility of organic solids in a solvent increases with increasing temperature. This is because as temperature increases, the kinetic energy of the particles in the solvent increases, making them more likely to break apart the bonds in the solid and dissolve it.

However, this relationship may not hold true for all organic solids, as some may have a decrease in solubility at higher temperatures due to changes in their molecular structure. Additionally, the type of solvent used can also affect the solubility- for example, some solvents may have a higher solubility for organic solids at lower temperatures.

Learn more about effect of temperature on solubility : https://brainly.com/question/17071337

#SPJ11

Answer: Fertilization defintion

Explanation:

the action or process of fertilizing an egg, female animal, or plant, involving the fusion of male and female gametes to form a zygote.

Or giving rise to new indivisual organisms or offspring and initiating development

Answer:

0.0220 g (22 mg) of NO2.

Explanation:

To solve this type of problem, it is best to work with grams. Remember that 1 kg equals 1000 g and 1 g equals 1000 mg. The conversion for 5.26 kg of nitrogen monoxide (NO) would be:

And for 7.64 mg of oxygen (O2) is:

The next step is to find the number of moles of each reactant using its molar mass. The molar mass of NO is 30 g/mol (you can calculate the molar mass of a compound using the periodic table):

And the moles of oxygen (O2) is 32 g/mol:

The next step is to see how many moles of NO" can be produced for each reactant.

You can see in the chemical equation that 2 moles of NO produce 2 moles of NO2, so the molar ratio between them is 1:1. This means that 175.33 moles of NO reacted produce 175.33 moles of NO2.

Now, you can see that 1 mol of O2 reacted produces 2 moles of NO2, so let's see how many moles of NO2 are being produced:

You can note that the limiting reactant, in this case, is oxygen (O2) because this reactant imposes the "limit" to produce the product.

The final step is to convert from 4.776 x 10^(-4) moles of NO2 to grams using its molar mass which is 46 g/mol. The conversion will look like this:

We obtain 0.0220 g (22 mg) of NO2 from 5.26 kg of NO and 7.64 mg of O2.

The given chemical equation is:H+ + CN- ⇋ HCN .The equilibrium constant is given as:Kc = [HCN]/([H+] [CN-])We know that the concentration of NaCN is equal to the concentration of CN-, the [CN-] is 0.100 M.

The formula to calculate pH is:pH = -log[H+]Initially, we need to calculate the concentration of H+ ions.Using the chemical equation, we can write:

[HCN] = [H+] [CN-]/KcLet [H+] be x, we have

[HCN] = x (0.100)/Kc[HCN]

= (x * 0.100)/9.12 x 10^-10

= (0.100x)/9.12 x 10^-10(x * 0.100)/(0.100x)

= 9.12 x 10^-10/0.100

= 9.12 x 10^-9

Now we can apply the quadratic formula to solve for x.

x2 + 9.12 x 10^-9 x - 9.12 x 10^-11 = 0x

= (-9.12 x 10^-9 ± √(9.12 x 10^-9)^2 - 4(1)(-9.12 x 10^-11))/(2(1))x

= (-9.12 x 10^-9 ± √8.34144 x 10^-17)/2

Now we need to select the correct value for x.pH = -log[H+]When we solve for x, we get two values:

x = 1.20 x 10^-4, -7.56 x 10^-10

Since the value of x cannot be negative, we select the positive value of x.

x = 1.20 x 10^-4pH

= -log[H+]pH

= -log[1.20 x 10^-4]pH

= 3.9

Therefore, the correct answer is option C. 4.52.

To know more about equilibrium  , visit;

https://brainly.com/question/517289

#SPJ11

Since pH + pOH = 14, we can calculate the pH:

pH = 14 - pOH = 14 - 4.52 = 9.48

Therefore, the pH of the 0.100 M NaCN solution is approximately 9.48.

To calculate the pH of a solution of NaCN, we need to consider the dissociation of NaCN into Na+ and CN- ions. CN- can react with water to form HCN and OH- ions. The equilibrium expression for this reaction is:

CN- + H2O ⇌ HCN + OH-

Given that the K value for this reaction is 9.12 x 10^(-10), we can set up an equilibrium expression:

K = [HCN] * [OH-] / [CN-]

Since NaCN is a strong electrolyte, we can assume that the concentration of CN- after dissociation is equal to the initial concentration of NaCN, which is 0.100 M.

Let's assume that the concentration of OH- at equilibrium is x M. The concentration of HCN would also be x M, and the concentration of CN- would be 0.100 M - x M.

Plugging these values into the equilibrium expression, we have:

9.12 x 10^(-10) = (x * x) / (0.100 - x)

Simplifying the equation, we get:

9.12 x 10^(-10) = x^2 / (0.100 - x)

Multiplying both sides by (0.100 - x), we have:

9.12 x 10^(-10) * (0.100 - x) = x^2

Expanding and rearranging the equation, we obtain a quadratic equation:

9.12 x 10^(-11) - 9.12 x 10^(-10) * x + x^2 = 0

Now, we can solve this equation using the quadratic formula:

x = (-b ± √(b^2 - 4ac)) / (2a)

For this equation, a = 1, b = -9.12 x 10^(-10), and c = 9.12 x 10^(-11).

Solving the quadratic equation using the quadratic formula, we find two solutions for x:

x = 2.98 x 10^(-5) M (approximately) or x = 9.12 x 10^(-6) M (approximately)

The concentration of OH- at equilibrium is x, so the concentration of OH- is approximately 2.98 x 10^(-5) M.

Since pH is defined as the negative logarithm of the hydrogen ion concentration, we can calculate the pOH as:

pOH = -log10([OH-]) = -log10(2.98 x 10^(-5)) = 4.52

Finally, since pH + pOH = 14, we can calculate the pH:

pH = 14 - pOH = 14 - 4.52 = 9.48

Therefore, the pH of the 0.100 M NaCN solution is approximately 9.48.

To know more about pH, visit:

https://brainly.com/question/2288405

#SPJ11

Answer: i believe the answer is parsecs!

Explanation:

To balance Ca + Cl2 = CaCl2 you'll need to be sure to count all of atoms on each side of the chemical equation.

Once you know how many of each type of atom you can only change the coefficients (the numbers in front of atoms or compounds) to balance the equation for Calcium + Chlorine gas.

Answer:

Potential energy

Explanation:

Answer:

In physics, action is an attribute of the dynamics of a physical system from which the equations of motion of the system can be derived through the principle of stationary action. ... Action has dimensions of energy⋅time or momentum⋅length, and its SI unit is joule-second.

Explanation:

hope it helps

Answer:

Action is an attribute of the dynamics of a physical system from which the equations of motion of the system can be derived through the principle of stationary action.

Explanation:

The use of sodium hydroxide (NaOH) in the determination of acetylsalicylic acid (ASA) by UV spectroscopy is for the purpose of removing the acetyl group from ASA, converting it to salicylic acid (SA).

This step is necessary because salicylic acid is more easily analyzed by UV spectroscopy, as it has a strong absorption peak at around 270 nm. In contrast, ASA has a weak absorption at this wavelength and is not easily detected by UV spectroscopy.

By adding NaOH to the solution of ASA, the acetyl group is deprotonated and can be removed by reaction with the hydroxide ion, converting the ASA to SA.

The resulting SA solution can then be measured by UV spectroscopy, providing a much stronger signal and more accurate determination of the ASA concentration.

In this manner, the use of NaOH allows for a more sensitive and accurate determination of the ASA concentration by UV spectroscopy.

Know more about uv spectroscopy

https://brainly.com/question/6476739#

#SPJ11

Answer:

23%

Explanation:

Answer:

Volume

Explanation:

Volume is the quantity of three-dimensional space enclosed by a closed surface, for example, the space that a substance (solid, liquid, gas, or plasma) or 3D shape occupies or contains.[1] Volume is often quantified numerically using the SI derived unit, the cubic metre. The volume of a container is generally understood to be the capacity of the container; i.e., the amount of fluid (gas or liquid) that the container could hold, rather than the amount of space the container itself displaces. Three dimensional mathematical shapes are also assigned volumes. Volumes of some simple shapes, such as regular, straight-edged, and circular shapes can be easily calculated using arithmetic formulas. Volumes of complicated shapes can be calculated with integral calculus if a formula exists for the shape's boundary. One-dimensional figures (such as lines) and two-dimensional shapes (such as squares) are assigned zero volume in the three-dimensional space.

The volume of a solid (whether regularly or irregularly shaped) can be determined by fluid displacement. Displacement of liquid can also be used to determine the volume of a gas. The combined volume of two substances is usually greater than the volume of just one of the substances. However, sometimes one substance dissolves in the other and in such cases the combined volume is not additive.[2]

In differential geometry, volume is expressed by means of the volume form, and is an important global Riemannian invariant. In thermodynamics, volume is a fundamental parameter, and is a conjugate variable to pressure.

when the strong base is added to account for exactly half of the moles of the weak acid, the components present in the solution are water (H2O), formate ions (HCOO-), and any remaining unreacted weak acid (HCOOH).

When the strong base is added to account for exactly half of the moles of the weak acid (HCOOH) in an acid-base titration, the components present in the solution can be described as follows.

At the beginning of the titration, the weak acid, formic acid (HCOOH), is present in the solution. It partially dissociates, releasing hydrogen ions (H+) and formate ions (HCOO-). Additionally, water molecules (H2O) are present as the solvent.

As the strong base is added, it reacts with the weak acid. In this case, since the strong base is added to account for half of the moles of the weak acid, exactly half of the formic acid molecules will react. The strong base, such as sodium hydroxide (NaOH), dissociates completely in water, releasing hydroxide ions (OH-) into the solution.

During the reaction, the hydroxide ions from the strong base react with the hydrogen ions from the weak acid to form water (H2O). At this point, the solution will contain water (H2O), formate ions (HCOO-), and any excess weak acid (HCOOH) that hasn't reacted with the strong base.

To know more about sodium hydroxide (NaOH), visit:

https://brainly.com/question/28362559

#SPJ11

The temperature needed to fuse helium into carbon is about 100 million degrees Celsius (180 million degrees Fahrenheit).

This temperature is found in the core of a star during the process known as helium burning, which occurs after hydrogen burning.

The fusion process involves the combination of two atomic nuclei to form a heavier nucleus, releasing a tremendous amount of energy in the process. In the core of stars, the immense pressure and temperature create conditions where fusion can occur, leading to the formation of heavier elements like carbon, oxygen, and nitrogen.

Helium is a chemical element with the symbol He and atomic number 2. It is the second-lightest element in the periodic table and is the least reactive of all the elements. Here are some key points about helium:

Physical Properties: Helium is a colorless, odorless, and tasteless gas at room temperature and pressure. It has a very low density, making it lighter than air. It is the only element that cannot be solidified by cooling under normal atmospheric pressure.

Abundance: Helium is the second most abundant element in the universe, after hydrogen. However, it is relatively rare on Earth. It is primarily obtained as a byproduct during the extraction of natural gas, where it is found in small amounts.

To know more about  fusion process , visit;

https://brainly.com/question/33450432

#SPJ11

Answer and Explanation:

I hope this answer and explanation is easy to follow. Let me know if I can be of further assistance.

9.14moles

According to the Avogadro's constant,

We are to determine the moles of 5.50 x 10^24 molecules of butane. This is expressed as:

Therefore the required mole of butane is 9.14moles

Answer:

Compounds are substances composed of two or more elements chemically combined that can be separated into simpler substances only by chemical means. Water, for example, is a compound because pure water is composed of only H2O molecules.

Pls choose me as brainliest!

Then attraction holds individual covalent molecules together as a solid are the force that hold the atom together if the each atom nucleus for the shared pair of electrons. the covalent compounds have very low melting point and boiling point.

The covalent bond form between the atoms by the sharing of electron. when there is no much difference in electronegativity of the atoms then the electrons are equally shared between two atoms. the mutual sharing of electrons formed covalent bond . the compound is called as covalent compound or molecules.  the molecules held by very weak intermolecular forces and it is very easy to break them . so, they have low melting point and boiling point.

Thus, Then attraction holds individual covalent molecules together as a solid are the force that hold the atom together if the each atom nucleus for the shared pair of electrons .the covalent compounds have very low melting point and boiling point.

To learn more about covalent molecule here

https://brainly.com/question/769196

#SPJ4

Answer:

As you move from left to right, the nucleus gains protons. This increases the positive charge of the nucleus and its attractive force on the electrons. At the same time, electrons are added to the atoms as you move from left to right across a period.

Explanation: