For the reaction below, Kc = 1.10 × 10⁻⁴. Note Kc is sometimes called K.

What is the equilibrium concentration of C if the reaction begins with 0.200 M A and 0.300 M B?

2 A (aq) + B (aq) ⇌ C (aq)

The average atomic mass  for the new element is given 81.5529 amu. The percentage abundance for the third isotope is 13.6 %. Then its atomic mass is 83.9 amu.

Isotopes are atoms of same element with different atomic mass numbers. Almost all elements have two or more isotopes but not all of them are stable in nature.

The average atomic mass can be calculated from the isotopic mass and and percentage abundance as follows:

atomic mass = ∑ (isotopic mass × %abundance /100 )

Apply the isotopic mass and abundance of all isotopes given as follows:

atomic mass of the element = (76.12/100 ×81.6643 amu) +  (10.27/100 × 81.1239 amu)  +  (13.6 /100 × X amu) =81.5529 amu.

Then,

(13.6 /100 × X amu) = 70.41 amu.

X  = 83.9 amu.

Therefore, the atomic mass of the third isotope is 83.9 amu.

Find more on isotopes:

brainly.com/question/21536220

#SPJ9

It will be scavenged by lysosomes and destroyed.

What is a lysosome?

To know more about lysosomes, click the link given below:

https://brainly.com/question/28202356

#SPJ1

Molality of an aqueous solution of 5.0% NaCl will be 0.842 m. Mole fraction of NaCl is 0.014 and mole fraction of water is 0.98.

To calculate molality, we first calculate the mass of NaCl in the solution which is, 100 x 5/100% = 5g.

We then calculate the moles of NaCl in the solution,

5/58.45 = 0.08 (Molar mass of NaCl = 58.45)

Mass of water in the solution = 100g - 5g = 95g x 1/1000 = 0.095

Therefore, molality can now be calculated as,

Molality = 0.08/0.095 = 0.842 m.

To calculate the mole fraction of the solution, we first calculate the moles of water in the solution,

Moles of water = 95/18 = 5.27 mol of water (Since molar mass of water = 18)

Now, mole fraction of NaCl = 0.08/5.27 + 0.08 = 0.014

Mole fraction of water = 5.27/5.27 + 0.08 = 0.098

To learn more about molality visit:

brainly.com/question/14591804

#SPJ1

The correct number of protons, neutrons, and electrons in a neutral atom of Sn is 50 protons, 68 neutrons, 50 electrons.

Neutral atom of Sn

Atomic number of Sn is 50 .

As we know

Atomic number = no. of protons = no. of electrons

then ,

Number of protons = 50

Number of electrons = 50

Now , atomic mass = no. of protons + no. of neutrons

Atomic mass of Sn is 118 u

Therefore , 118 = 50 + number of neutrons

Number of neutrons = 118 -50

Number of neutrons = 68

Hence, in a neutral atom of Sn , there are 50 protons , 68 neutrons , 50 electrons. option (c) is correct .

Learn more about protons, neutrons and electrons from the link given below.

https://brainly.com/question/29762503

#SPJ4

The amount of iodine-123 that will still be active 60 hours later is 0.0766 mCi.

The effective half-life of iodine-123 is 12 hours, which means that after each 12-hour period, the activity of the sample will be reduced by half. After 60 hours, or 5 half-lives, the activity will be reduced to:

(1/2)^5 = 1/32

So only 1/32 of the original activity will remain. To find the activity that remains, we can multiply the initial activity by the fraction of the original activity that remains:

Remaining activity = (1/32) x 2.45 mCi = 0.0766 mCi

Therefore, the amount of iodine-123 that will still be active 60 hours later is 0.0766 mCi.

learn more about Radioactive iodine-123: https://brainly.com/question/17162999

#SPJ1

About 0.153125 mCi of iodine-123 will still be active 60 hours later.

Effective half-life of a radioactive substance is the amount of time it takes for the activity of the substance to decrease to half of its initial value, taking into account both the physical half-life of the substance and any biological processes that may affect its decay rate.

In this case, the effective half-life of iodine-123 is 12 hours. This means that after 12 hours, the activity of the substance will be reduced to half its initial value, and after another 12 hours (i.e., 24 hours after the initial dose), it will be reduced to one-quarter of its initial value, and so on.

To calculate the amount of iodine-123 that will still be active 60 hours later, we can use the following formula:

activity = initial activity x (1/2)^(t / t1/2)

where

Plugging in the values, we get:

activity = 2.45 mCi x (1/2)^(60 hours / 12 hours)

activity = 2.45 mCi x 0.0625

activity = 0.153125 mCi

Therefore, about 0.153125 mCi of iodine-123 will still be active 60 hours later.

Learn more about effective half-life here : brainly.com/question/1160651

#SPJ1

To break all the bonds in one mole of molecules with a bond dissociation energy of 1 eV, we would require around 5.80 x [tex]10^{26}[/tex] kJ of energy.

The bond dissociation energy of 1 eV is roughly 96.485 kJ/mol. To break all the bonds in one mole of molecules (6.023 x [tex]10^{23}[/tex] molecules), we would need to multiply the bond dissociation energy by Avogadro's number:

96.485 kJ/mol x 6.023 x [tex]10^{23}[/tex] molecules/mol = 5.80 x [tex]10^{26}[/tex] kJ/mol

Bond dissociation energy is the amount of energy necessary to break a chemical connection between two atoms. It is also known as bond energy or bond enthalpy. This energy is measured in kilojoules per mole (kJ/mol) and is released when the bond forms. The energies of bond dissociation can vary greatly depending on the type of bond being broken.

For more such questions on enthalpy, click on:

https://brainly.com/question/14047927

#SPJ4

The boys could cover the end of the test tube with a balloon to capture the escaping gas. Therefore, the correct option is option C.

A chemical reaction is the chemical change from one set of chemical components into another. Chemical reactions are changes that solely affect the locations of electrons inside the formation as well as breakdown of chemical bonds that link atoms, and without any modification to the nuclei, and therefore are frequently represented using a chemical equation.

Nuclear chemistry is the branch of chemistry that studies the chemical interactions of unstable especially radioactive materials, which can result in both electronic plus nuclear alterations. The boys could cover the end of the test tube with a balloon to capture the escaping gas.

Therefore, the correct option is option C.

To learn more about chemical reactions, here:

https://brainly.com/question/24123817

#SPJ9

The balanced form of the chemical equation given above is as follows: C₂H₁₆ + 60₂ -> 6CO₂ (g) + 6H₂O(g).

A chemical equation is a symbolic representation of a chemical reaction where reactants are represented on the left, and products on the right.

A chemical equation is said to be balanced when the number of atoms of each element on both sides of the equation is the same.

According to this question, the equation for photosynthesis is given. The balanced form is as follows:

C₂H₁₆ + 60₂ -> 6CO₂ (g) + 6H₂O(g)

Learn more about balanced equation at: https://brainly.com/question/28294176

#SPJ1

The order of reaction can be known from the rate equation.

The question is incomplete but I will try to explain the concept of order of reaction to you.

We have to note that when we talk about the order of the reaction what we mean is the order that we can be able to obtain from the stoichiometry of the reaction.

We do not only look at the reaction equation as we try to obtain the order of reaction but we rely so heavily on the empirical data that we can get from the reaction for the order of reaction in each specie.

Learn more about order of reaction:https://brainly.com/question/1769080

#SPJ1

Answer:

true

Explanation:

red is commonly seen as angry by anyone you ask

Answer:

True

Explanation:

Colors can have symbolic meanings that are recognized across cultures and societies. For example, red is often associated with passion and love, while green is associated with growth and prosperity. Blue is often associated with stability and reliability, while yellow is associated with happiness and optimism. These symbolic meanings of colors are a form of nonverbal communication that is widely understood, making them a universal language.

1 ppm of F- means 1 mg of F- in 1 L of water. The cylindrical water has a volume of 12.3 × 10⁸ L. Then, 12.38 × 10⁵ g of F- have to be added to the reservoir.

PPM or parts per million is a term used to express the concentration of a substance. One  ppm of a substance is its 1 mg in 1 L. Hence, 1 mg of F- is present in 1 L of water.

Volume of cylinder = π r² d

given that, diameter = 353 m

radius = 176.5 m

d= 12.65 m

v = 3.14 × (176.5)²×12.65 = 12.37× 10⁵ m³ = 12.37 × 10⁸ L.

1 L have 1 mg F-. Then, 12.37 × 10⁸ mg or 12.37 × 10⁵ g of F-.

Molar mass of NaF  = 46 g/mol

46 g of NaF contains 19 g of F-. Then, mass of NaF that contains 12.37 × 10⁵ g of F- is:

12.37 × 10⁵ g × 46/19 = 2.97×10⁷ g.

Therefore, 2.97×10⁷ g of NaF  contains 12.37 × 10⁵ g of F-.

Find more on ppm :

https://brainly.com/question/14598158

#SPJ9

Answer:

because they have a full outer electron shell

Explanation:

Answer:

Noble gases are unreactive because they have a full outer electron shell, making them very stable and unlikely to participate in chemical reactions. They have low reactivity and are odorless, tasteless, and colorless gases.

Explanation:

With carbon dioxide, the phase change that takes place when the temperature decreases from -40°C to -80°C at 2 atm is Option B. A gas changes to a solid.

When the temperature decreases from -40°C to -80°C at 2 atm, the pressure and temperature of the carbon dioxide falls within the region in the phase diagram where the substance changes from a gas to a solid. This process is called deposition or sublimation.

Therefore, the correct answer is as given above. It could then be concluded that the phase change that takes place when the temperature decreases from -40°C to -80°C at 2 atm is Option B. A gas changes to a solid.

learn more about sublimation: https://brainly.com/question/20319173

#SPJ1

Answer:

Explanation:

"Qc" stands for "Reaction Quotient Concentration" and represents the ratio of the concentrations of products raised to their stoichiometric coefficients, divided by the ratio of the concentrations of reactants raised to their stoichiometric coefficients at a given point in a chemical reaction.

Qc is used in comparison to "Kc," the "Equilibrium Constant Concentration," to determine the direction in which a chemical reaction at equilibrium will shift. If Qc is less than Kc, the reaction will shift in the direction that increases the concentration of products, so as to reach a new state of equilibrium with Kc. Conversely, if Qc is greater than Kc, the reaction will shift in the direction that increases the concentration of reactants, so as to reach a new state of equilibrium with Kc.

In other words, if Qc is equal to Kc, the reaction is at its state of equilibrium, and any changes to the concentrations of reactants or products will cause the reaction to shift until a new state of equilibrium is reached with the updated Kc value. If Qc is not equal to Kc, the reaction will shift until it reaches a state of equilibrium with the updated Kc value.

The molar specific heat, Cv, of a gas in which each molecule has degrees of freedom γ is  [tex]C_v= (s*r)/2 J/mol*K[/tex]

The molar heat capacity of a chemical substance is the quantum of energy that must be added, in the form of heat, to one operative of the substance in order to beget an increase of one unit in its temperature.

Alternately, it's the heat capacity of a sample of the substance divided by the quantum of substance of the sample; or also the specific heat capacity of the substance times its molar mass. The SI unit of molar heat capacity is joule per kelvin per operative, JK⁻¹

The largest number of logically independent values—that is, values with the freedom to change—in the data sample is referred to as the degree of freedom. If there is a remaining requirement for the data sample, particular data sample items must be picked after the degrees of freedom quantity has been decided.

Learn more about Degree of freedom:

https://brainly.com/question/30488442

#SPJ4

Complete question:

Thermodynamics deals with the macroscopic properties ofmaterials. Scientists can make quantitative predictions about thesemacroscopic properties by thinking on a microscopic scale. Kinetictheory and statistical mechanics provide a way to relate molecularmodels to thermodynamics. Predicting the heat capacities of gasesat a constant volume from the number of degrees of freedom of a gasmolecule is one example of the predictive power of molecularmodels.

The molar specific heatC_vof a gas at a constant volume is thequantity of energy required to raise the temperatureTof one mole of gas by one degree while thevolume remains the same. Mathematically,

[tex]C_{\rm v}= \frac{1}{n}\,\frac{dU}{dT},[/tex]

wherenis the number of moles of gas,dUis the change in internal energy, anddTis the change in temperature.

Kinetic theory tells us that the temperature of a gas isdirectly proportional to the total kinetic energy of the moleculesin the gas. The equipartition theorem says that each degree offreedom of a molecule has an average kinetic energy equal to[tex]\frac{1}{2}k_}{\rm BT[/tex],  wherek_Bis Boltzmann's constant[tex]1.38 \times 10^{-23} \rm {J/K}[/tex] . Whensummed over the entire gas, this gives[tex]\frac{1}{2}nR[/tex]T, where [tex]R=8.314\; {\rm \frac{J}{mol\cdot K}}[/tex] is the ideal gas constant, for each molecular degree offreedom.

Part A

Using the equipartition theorem, determine the molar specific heat,C_v, of a gas in which eachmolecule hassdegrees of freedom.

Express your answer in terms ofRands.

Part B

Given the molar specific heatC_vof a gas at constant volume, you candetermine the number of degrees of freedomsthat are energetically accessible.

For example, at room temperature cis-2-butene,\rm C_4 H_8, has molar specific heat [tex]C_v=70.6\;{\rm \frac{J}{mol \cdot K}[/tex]}. How many degrees of freedom of cis-2-butene areenergetically accessible?

Express your answer numerically to the nearest integer.

Answer:

chemical reaction

Explanation:

Answer:

Making soap can be considered a chemical reaction.

Explanation:

In the process of making soap, a reaction takes place between a fat or oil and an alkali, such as lye (sodium hydroxide), which results in the formation of soap molecules and glycerol. This reaction is known as saponification. The change in the composition of the reactants to form a new substance is a chemical change, not a physical change or a phase change.

(a) Expanded structure:

CH3–CH2–CH–CH3

Condensed structure:

CH3CH2CHCH3

(b) Carbon a is a primary carbon and Carbon b is a secondary carbon.

Generally, Chemical formulas are symbols used to represent elements and molecules.

They usually consist of the symbols for the elements in the molecule, with subscripts indicating the number of each atom.

For example, the chemical formula for water is H2O, indicating two hydrogen atoms and one oxygen atom.

Read more about chemical formulas:

https://brainly.com/question/29031056

#SPJ1

Answer: 23

Explanation:

because it is been multiplyed by 3 has s 31 nucleons and has atomic numbe equal to 15. The number of electron having m = 0 i

Answer:

The number of electrons with magnetic quantum number m = 0 can be calculated from the atomic number of the element. The atomic number gives the number of protons, and thus the number of electrons in a neutral atom. For the anion X-3, we have 15 - 3 = 12 electrons. The magnetic quantum number m can have integer values from -j to +j, where j is a half-integer representing the total angular momentum quantum number of the electron. In this case, j can be equal to 1/2, 3/2, 5/2, and so on. For the lowest value of j, which is 1/2, the magnetic quantum number m can have two values, +1/2 and -1/2. Thus, there are two electrons with m = 0. The number of electrons with m = 0 is equal to the number of electrons in the lowest energy level, which is the 1s orbital. In this case, two electrons occupy the 1s orbital, and both have m = 0.

Explanation:

Answer:

5.125 moles of water

Explanation:

Given the reaction:

Cu + 8HNO3 --> 3 Cu(NO3)2 + 2 NO + 4 H2O

When 41 moles of HNO3 are consumed, we can calculate the number of moles of water produced using the stoichiometric coefficients in the balanced chemical equation.

According to the coefficients, 1 mole of Cu reacts with 8 moles of HNO3 to produce 4 moles of H2O. Therefore, when 41 moles of HNO3 are consumed, we can calculate the number of moles of water produced as follows:

41 moles HNO3 / 8 moles HNO3 per mole H2O = 5.125 moles H2O

So, 5.125 moles of water can be made when 41 moles of HNO3 are consumed.

Taking into account the reaction stoichiometry, 380.12 grams of O₂ are produced as the result of the decomposition of 843 g of NaClO₃.

In first place, the balanced reaction iS:

2 NaClO₃ → 2 NaCl + 3 O₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

By reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: if by reaction stoichiometry 212.9 grams of NaClO₃ form 96 grams of O₂, 843 grams of NaClO₃ form how much mass of O₂?

mass of O₂= (843 grams of NaClO₃× 96 grams of O₂) ÷212.9 grams of NaClO₃

mass of O₂= 380.12 grams

Finally, 380.12 grams of O₂ are formed.

Learn more about the reaction stoichiometry:

brainly.com/question/24741074

#SPJ1

We're given that the enthalpy of formation of 1 mol of NH3 (aq) is -80.29 kJ/mol. This is the amount of energy it takes to form 1 mol of NH3 (aq).

To determine the enthalpy required to form 3 mol of NH3 (aq), multiply -80.29 by 3:

[tex]-80.29*3\\= -240.97[/tex]

b) -240.97 kJ

The correct number of significant figures in the number [tex]9.080 \times 10^4[/tex] is 4.

Significant figures refer to the digits in a number that are trustworthy and denote the amount of something, also known as the significant digits, accuracy, or resolution.

Only the digits allowed by the measurement resolution are dependable, hence only these can be important figures if a number expressing the outcome of a measurement (such as length, pressure, volume, or mass) has more digits than the number of digits allowed by the measurement resolution.

Some rules to understand significant figures:

1. Non-zero digits are always significant

2. Zeros between non-zero digits are always significant.

3. Leading zeros are never significant.

4. Trailing zeros are only significant if the number contains a decimal point

This number has 4 significant figures.

To know more about significant figures, click the link given below:

brainly.com/question/29153641

#SPJ1

in front of H2O for balance the hydrogen atoms: CH4 + O2 CO2 + 2H2O. A 2 can be placed  Oxygen gas on the left to balance the oxygen atoms: CH4 + 2O2 Carbon dioxide + 2H2O. Now the equation balances.

The equation that balances is CH4(g)+2O2(g)CO2(g)+2H2O. (g) Methane (CH4) and oxygen (O2) combine during combustion to form carbon dioxide (CO2) and water (H2O): CO2 + 2 H2O CH4 + 2 O2 The laws of mass conservation is observed in this reaction because nothing was actually generated or destroyed, only rearranged.

According to the hierarchy of carbon atom attachments, primary carbon is only tied to one carbon atom, secondary carbon is only attachment to two carbon, tertiary carbon is only connected to carboxylic acid group, and quaternary chlorine is only linked to carbon rings.

To know more about hydrogen atoms visit :

https://brainly.com/question/1462347

#SPJ1

Answer:

A) 6.50 moles 0₂

Explanation:

In the reaction, 2 moles of Calcium oxide decomposes to produce 2 moles of Calcium and 1 mole of Oxygen gas.

So, when 6.50 moles of Calcium oxide decomposes, 6.50 x (1 mole O₂ / 2 moles Calcium oxide) = 6.50 x 0.5 = 3.25 moles of Oxygen gas will be produced.

And as 3.25 x 2 =  moles O₂,

Answer:

157.48 g

Explanation:

To calculate the mass of a piece of iron with a volume of 20.00 cm³, we can use the formula:

mass = density x volume

where density is the density of pure iron (7.874 g/cm³) and volume is the volume of the iron piece (20.00 cm³).

mass = 7.874 g/cm³ x 20.00 cm³ = 157.48 g

So, the mass of the iron piece is 157.48 g.

Answer:

the final volume of the gas inside the cylinder after 0.500 mole has leaked out is 37.0 L.

Explanation:

The ideal gas law states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature. Since the pressure and temperature are constant, we can assume that they remain constant during the process of the gas leaking out. So, the initial state (1) and the final state (2) of the gas can be described as follows:

(1) PV1 = n1RT

(2) PV2 = (n1 - 0.500)RT

Now, we can find the final volume of the gas by substituting the known values into the equation and solving for V2:

V2 = (n1RT)/P = (1.90 * 8.31 * T)/P

V2 = (1.90 * 8.31 * T)/P = (1.90 * 8.31 * T)/P = 49.0

V2 = 49.0 L * (1.90 - 0.500) / 1.90

V2 = 37.0 L

Answer:

Explanation:

In order to balance the equation, the coefficients in front of each element must be equal on both sides of the equation. Here's one way to balance the equation:

2 AI + 3 CuSO4 ---------------> 2 AI2(SO4)3 + 3 Cu

This means that for every 2 atoms of AI and 3 molecules of CuSO4, you'll get 2 molecules of AI2(SO4)3 and 3 atoms of Cu.

Answer:

56.11 g/mol

Explanation:

Answer:

56.105 g/mol

Explanation:

KOH is Potassium Hydroxide, a strong base commonly used in various industrial and laboratory applications.

The molar mass of KOH can be calculated by adding the atomic masses of its elements:

Potassium (K) - 39.098 g/mol

Oxygen (O) - 15.999 g/mol

Hydrogen (H) - 1.008 g/mol

So, the molar mass of KOH is:

39.098 g/mol + 15.999 g/mol + 1.008 g/mol = 56.105 g/mol


ALLEN

According to the stoichiometry of the given balanced chemical equation, 1.85 moles of methane are  required to produce 9.03 g of hydrogen.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

In the given reaction, 16 g that is 1 mole methane gives 6 g that is 3 moles hydrogen ,hence for 9 g hydrogen 16×6/9=24.08 g methane is needed and it is equivalent to number of moles= 24.08/16=1.85 moles.

Thus,1.85 moles of methane are  required to produce 9.03 g of hydrogen.

Learn more about stoichiometry,here:

https://brainly.com/question/9743981

#SPJ1

Answer:

Exothermic-Producing heat

Endothermic-absorbing heat

Answer:

An endothermic reaction is a chemical reaction that absorbs heat energy, causing the temperature of the system to decrease. An exothermic reaction is a chemical reaction that releases heat energy, causing the temperature of the system to increase.

Explanation: