Consider the following information.

A+ KOH → B+ 2 KNO3What is the molecular formula of A, what is the molecular formula for B? You have to balance the A + KOH part of the equation. MM of B = 62.068g/mol

B is 38.67 % C, 9.67% H and 51.56 % O

Conditions that are likely to make the combustion of ethane gas a spontaneous change are any temperature, because combustion of ethane leads to an increase in entropy. Hence the correct option is A.

When ethane undergoes combustion, it reacts with oxygen to produce carbon dioxide and water vapor, which are in a more disordered state than the initial reactants. This results in an increase in the overall entropy of the system, making the process spontaneous.

According to the second law of thermodynamics, a spontaneous process is one that leads to an increase in the entropy of the system and/or the surroundings.

Therefore, regardless of the temperature conditions, the combustion of ethane will always be a spontaneous change because it leads to an increase in entropy. Hence the correct option is A.

To know more about entropy:

https://brainly.com/question/27075218

#SPJ1

Answer:

C₄H₃N

Explanation:

To solve this question we must find the moles of each atom in order to find the empirical formula (Simplest ratio of atoms present in a molecule). With empirical formula and the molar mass of the compound we can find the molecular formula as follows:

Moles H:

91.5mg H * (1mmol / 1mg) =

91.5mmol H

Moles N:

424mg N * (1mmol / 14mg) =

30.286mmol N

The ratio of moles regard to moles N (The lower number of moles is:

H = 91.5mmolH / 30.286mmolN = 3.0

N = 30.286mmolN / 30.286mmolN = 1

empirical formula = CₓH₃N

The molar mass of this formula is:

12*x + 1*3 + 1*14 = 17g/mol

Solving for X:

12X + 17g/mol = 65g/mol

12X = 48g/mol

X = 4

There are 4 atoms of carbon and molecular formula is:

Answer: I believe its 1

Hope this helps!

Answer:

K=CHANGE IN CONCENTRATION/TIME TAKEN

Explanation:

The force between two masses is directly inversely correlated to the square of the distance between them, and Newton's law of gravitation states that it is proportionate to the product of their masses.

Theoretically, anything with mass emits small particles known as gravitons, which is why mass and gravity are related.The gravitational attraction is caused by these gravitons. Gravitons increase with mass.

As a result, we state that the attraction force is inversely related to the square of a distance between the masses and directly proportional to a product of the masses.

To know more about masses visit:

https://brainly.com/question/19694949

#SPJ1

Answer:

part a.)

The equilibrium constant expression is:

Kc = [X][Y]^2/[W]^2

where [X], [Y], and [W] are the molar concentrations of X, Y, and W at equilibrium.

part b)

Example 1:

Assume that the initial concentration of W is 1 M and the initial concentrations of X and Y are both 0 M. At equilibrium, let [W] be x M and [X] and [Y] each be y M. Then we have:

2W ⇌ X + 2Y

Initial: [W] = 1 M, [X] = [Y] = 0 M

Equilibrium: [W] = x M, [X] = [Y] = y M

The second set example is:

Assume that the initial concentration of W is 0.8 M and the initial concentrations of X and Y are both 0.4 M. At equilibrium, let [W] be x M and [X] and [Y] each be y M. Then we have:

2W ⇌ X + 2Y

Initial: [W] = 0.8 M, [X] = [Y] = 0.4 M

Equilibrium: [W] = x M, [X] = [Y] = y M

The equilibrium constant of a chemical reaction is described as the value of its reaction quotient at chemical equilibrium.

It is also a state approached by a dynamic chemical system after sufficient time has elapsed at which its composition has no measurable tendency towards further change.

Learn more about equilibrium constant at: https://brainly.com/question/3159758

#SPJ1

Answer:

B

Explanation:

neutrons + atomic number/proton/electron for a neutral atom = mass number

e.g

mass number of Chlorine 35.5

proton number 17

neutron number will be 35.5-17 = 18.5

Therefore.....

your question deduced says

atomic number is 5

mass number is 11

neutron number is however mass number minus atomic number 11-5 =6

(a) Because acid is caustic, dolphins can perish from exposure to it. Acids are compounds that give other things protons (H+). Acid can react with the proteins and lipids in dolphins' skin when they come into touch with it, leading to chemical burns and damage to the underlying tissue. Systemic consequences from this include death.

(b) Because chlorine is a potent oxidizer, it interacts with red-hot iron powder to produce Iron(III) chloride (FeCl3) rather than Iron(II) chloride (FeCl2). FeCl3 is created when chlorine at high temperatures rapidly accepts electrons from iron atoms. Contrarily, iron interacts with HCl, a less potent oxidizer than chlorine, to produce FeCl2.

Learn more about chlorine at :

https://brainly.com/question/31560014

#SPJ1

Answer:

Explanation:

1 ) Ammonium bromide is a salt of ammonium hydroxide and hydrogen bromide . The former is a weak base and the later is a strong acid so the salt will make acidic solution in water. It happens due to salt hydrolysis.

2 ) Potassium cyanide is  salt of potassium hydroxide and hydrogen cyanide . The former is strong base and the later is weak acid so its salt will be basic in nature .

3 ) sodium chloride is a salt of sodium hydroxide and hydrogen chloride . The former is strong base and later is strong acid. So the salt is neutral .

4 ) Potassium iodide is a salt of potassium hydroxide and hydrogen iodide . The former is a strong base and the later is a strong acid . So the salt is neutral or a bit basic.

Answer:

Explanation:

yes

Answer:

yes

Explanation:

it acts as a barrier to oxygen and can transfer heat

Answer:

Jet ğıpep2pep2p2pp3oroe88r82

Answer:

a. To calculate the standard enthalpy of neutralization of sulphuric acid and sodium hydroxide, we can use the formula:

ΔH_neutralization = q_calorimeter / n_reactant

where q_calorimeter is the heat absorbed or released by the solution and n_reactant is the number of moles of reactant.

First, we need to calculate the heat absorbed or released by the solution using the equation:

q_calorimeter = mcΔT

where m is the mass of the solution, c is the specific heat capacity of the solution and ΔT is the change in temperature.

In this case, the mass of the solution is 50 cm³ + 50 cm³ = 100 cm³. The specific heat capacity of the solution is approximately 4.18 J/g°C. The change in temperature is 6.8°C.

q_calorimeter = (100 cm³) (4.18 J/g°C) (6.8°C) = 28.624 J

Then we need to calculate the number of moles of reactant used. The acid is sulfuric acid and the base is sodium hydroxide.

H2SO4 + 2NaOH -> Na2SO4 + 2H2O

The balanced equation shows that 1 mole of H2SO4 reacts with 2 moles of NaOH.

n_reactant = (50 cm³)(0.50 M) + (50 cm³)(0.10 M) = 2.5 moles

Therefore, the standard enthalpy of neutralization of sulphuric acid and sodium hydroxide is:

ΔH_neutralization = q_calorimeter / n_reactant = (28.624 J) / (2.5 moles) = -11.4496 kJ/mol

b. The value obtained in (a) is less than the expected value because heat exchange occurs between the reaction mixture and the calorimeter, which causes a loss of energy. Additionally, the solution may not have been perfectly insulated and heat may have been lost to the surroundings, also causing a loss of energy. Furthermore, the reaction may not have been performed under standard conditions, such as at a specific temperature or pressure.

The enthalpy or heat content of a system can be defined as the sum of the internal energy and the pressure volume energy of the system. It is denoted by H. The energy change of mixture is  47 kJ.

The transference of energy may take place in the form of work if the system and surroundings have different pressures. According to international conventions, work done on the system is positive and work done by the system is negative.

The enthalpy change is:

ΔH = ΔU + PΔV

190 = ΔU + 143

ΔU = 47 kJ

To know more about enthalpy change, visit;

https://brainly.com/question/16006209

#SPJ1

Answer:

a change from a solid to a liquid

Explanation:

Answer:

Dissolving salt in water is a chemical change.

Explanation:

A log burning is a chemical reaction, but not change. All the others are obviously not the answer.

On Earth he weighs 720 newtons. 36N is the weight. Therefore, the correct option is option D among all the given options.

The gravitational force of attraction exerted on an item by the presence of a huge second object, including the Earth or Moon. Weight is a result of the fundamental law of gravitation: whatever two things have the same weight.

They attract each other using a force that really is directly related to the sum of their masses as well as inversely related to the square of something like the distance separating them due to their masses.

F = mass ×4/9g

  = 720 ×4/9

  =36N

Therefore, the correct option is option D.

To know more about weight, here:

https://brainly.com/question/12156778

#SPJ9

Answer:

The assumption is quite reasonable.........

A lightbulb contains Ar gas at a temperature of 295K and at a pressure of 75kPa. The light bulb is switched on, and after 30 minutes its temperature is 418 K. What is a numerical setup for calculating the pressure of the gas inside the light bulb at 418K?

Explanation:

P

1

T

1

=

P

2

T

2

given constant

n

, and constant

V

, conditions that certainly obtain with a fixed volume light bulb.

And so

P

2

=

P

1

T

1

×

T

2

=

75

⋅

k

P

a

295

⋅

K

×

418

⋅

K

≅

100

⋅

k

P

a

.

Had the light bulb been sealed at normal pressure during its manufacture, what do you think might occur when it is operated?

By the concept of calculating moles ,it can br concluded that the no. of atoms of phosphorus in 8.80mol of copper(II) phosphate is=1.06\(x10^{25}\)

A mole is defined as amount of substance containing as many as elementary entities that are there in atoms of exactly 12 g of carbon-12.Therefore we can say,1 mole of copper(II) phosphate, Cu3(PO4)2, contains three moles of copper(II) cations and two moles of phosphate anions.

Again 1mole of phosphate anions contains one mole of phosphorus and four moles of oxygen.Considering all these informations we can conclude that:1 mole of copper(II) phosphate contains 2 moles of Phosphorus

Accordingle the sample contains=(8.80\(x\)2) moles of Phosphorus

                                    =(17.6\(x\)Avogadro's constant) atoms of  Phosphorus

                                    =(17.6\(x\)6.022\(x\)\(10^{23}\)) atoms of  Phosphorus

                                    =1.06\(x10^{25}\) [approx] no. of Phosphorus atoms

to learn more about Moles,

https://brainly.com/question/30892840

In 8.80 moles of copper(II) phosphate, there are approximately 1.06 x 10²⁵ atoms of phosphorus.

The number of atoms of phosphorus in a given amount of a compound can be calculated using the concept of mole in chemistry. Copper(II) phosphate is Cu3(PO4)2, containing 2 moles of phosphorus (P) for every 1 mole of the compound. Avogadro's number (6.022 x 10²³) gives the number of atoms in one mole.

So, if there are 8.80 moles of copper(II) phosphate, there would be 2 × 8.80 moles of phosphorus. Multiplying this by Avogadro's number gives the total number of phosphorus atoms.

Therefore, the number of phosphorus atoms is 2 × 8.80 × 6.022 x 10²³ = 1.06 x 10²⁵ atoms of phosphorus.

https://brainly.com/question/32787463

#SPJ2

Answer:

B What role do animals have in the carbon cycle?

Group of answer choices

use water and release oxygen

use sugar and release carbon

use carbon and release oxygen

use carbon and release nitrogen

D, E Select TWO statements that describe what the scientists will observe in the ecosystem after fossil fuels have been extracted and burned.

Group of answer choices

There is more available space for carbon to become fossil fuels.

There is less carbon in storage.

There will be less carbon in the water.

There is more carbon in the atmosphere.

There will be more carbon respired by organisms.

There will be less carbon released through decomposition.

Explanation:

Animals obtain energy through sugar from the food they eat and release carbon into the air through respiration. Therefore, they partake in the carbon cycle by using sugar and releasing energy.

As far as the second question, when fossil fuels are burned, the carbon contained within them is released into the atmosphere in the form of carbon dioxide. So, there will obviously be a greater amount in the atmosphere.

I would like to apologise in advance if either of my option choices were incorrect.

The amount of energy that is required to change 20.0 g of an unknown substance from -15.0 °C to 7.0 °C is q = +49.65 kJ.

Energy is the ability to do tasks. It can exist in various forms, including potential, kinetic, thermal, electrical, chemical, and nuclear.

At -15°c, it will be solid, to increase the amount of heat to raise

temp from -15°C to 40°C.

(20.0) (3.3J/g°c) x 15°C) = 330 J.

At -10°C, it is in which phase transformation takes place from sold to wound.

ΔHfue = 0.945 J/gx 20g = 18.93.

After that, it will be in want and it will be in liquid form 40°C.

To 7°C, then.

922 m Cgas 47

=(20g) (1455/g°c) (17)

493005.

Total Energy = q1 + ΔHfus  + q2

47 = 7.0°C - 10°C) = 14°C -

2 330J18.95 + 49300J

q = 49648.9 3. 9

q = +49.65 KJ

Therefore, the amount of energy is q = +49.65 KJ.

To learn more about energy, refer to the link:

https://brainly.com/question/3805749

#SPJ1

Answer:

Natural catastrophes, such as hurricanes, floods, fires or earthquakes, among others, are events generated by nature itself that negatively impact the ecosystem, causing damage to the environment and the species that inhabit it, including the humans. Thus, for example, fires seriously affect the ecosystems on which they develop, destroying the biodiversity of vegetation and fauna that inhabit there, which threatens large numbers of species and puts a limit on their development and reproduction.

The reason why red is the only color seen after white light passes thrrough the filter is:

B. The color filter absorbs all colors except red light.

As we know, light is a form of energy and a type of electromagnetic radiation. In the case of this experiments the light that is being used is the visible light that is only one part of the electromagnetic spectrum.

Visible light contains all colors, and they differ in wavelengh.

In this case, we are told that the only color of light that passes through the filter is red, and as we know the light that is going into the filter contains all colors (the complete visible spectrum). Therefore we know that the filter absorbs all colors exept for red light.

The observation of a smaller outside hole than inside leads Becca to infer that an impact from the outside caused the hole, with a larger object striking and passing through the window from the inside.

From the observation that the hole in the window is smaller on the outside than on the inside, Becca, as a forensic technician, might deduce the following:

The hole was caused by an impact from the outside: The smaller outside hole suggests that the force that created the hole originated from the outside and exerted more pressure on the window surface facing inward.

The object causing the hole was larger on the inside: The discrepancy in hole sizes implies that the object that struck the window had a larger size or diameter on the inside, and as it penetrated the glass, it compressed or fragmented the glass, resulting in a larger hole on the inside.

The object may have passed through the window: The difference in hole sizes indicates that the object may have penetrated the window, potentially passing through to the inside. This could suggest a break-in or an incident involving the window being struck from the outside.

Overall, the observation of a smaller outside hole than inside leads Becca to infer that an impact from the outside caused the hole, with a larger object striking and passing through the window from the inside.

For more question on observation

https://brainly.com/question/29521469

#SPJ8

The equation for the equilibrium constant (K) of the reaction studied in this exercise can be written as follows: K = ([\(CI_20\), 2-] * [\(H_20\)(1)]) / ([\(C0_4^ 2\)-] * [Ht])

In this equation, the concentrations of the species involved in the reaction are represented by the square brackets [ ]. The subscripts indicate the stoichiometric coefficients of each species in the balanced chemical equation.

The reaction being studied involves the following species:

\(C0_4^ 2\)- (ag) + 2Ht (ag) = \(CI_20\), 2- (ag) + \(H_20\)(1)

In the equilibrium constant expression, the concentration of \(CI_20\), 2- is multiplied by the concentration of \(H_20\)(1) and divided by the product of the concentrations of \(C0_4^ 2\)- and Ht. The stoichiometric coefficients in the balanced equation are used as exponents for the concentrations of the respective species.

It is important to note that the concentrations used in the equilibrium constant expression should be in molar units (mol/L) or expressed as partial pressures for gases.

Additionally, the equilibrium constant is specific to a given temperature, and its value provides information about the relative amounts of reactants and products at equilibrium.

For more such question on  equilibrium constant visit:

https://brainly.com/question/3159758

#SPJ8

Answer:

The arguments both for and against allowing genetically altered meats into the United States is explained below in details.

Explanation:

Arguments for and against genetically altered meats:

Answer:

The arguments both for and against allowing genetically altered meats into the United States is explained below in details.

Explanation:

Arguments for and against genetically altered meats:

Supply the Society. By 2050, the world's inhabitants are supposed to increase from today's 7 billion to way beyond 9 billion.

ENVIRONMENTAL RISK.

STRONGER CROPS = LESS PESTICIDES.

REMEMBER WHEN CIGARETTES WERE 'HARMLESS'?

TAMPERING FOR TASTE. ...

BIG BUSINESS EATS SMALL FARMERS.

ENHANCED HEALTH.

NOTHING TASTES BETTER THAN NATURE.

Explanation:

The empirical formula for \(C_3_6 H_9\) is \(C_4H\).

Chemical   formulas that give only the relative number of atoms of each type in a molecule are called empirical formulas. The subscripts in an empirical formula are always the smallest possible whole-number ratios.

Look at the ratio of these two atoms in the compound

 C : H  

36: 9

Divide the ratio by 9 to get simple ratio:-

C       :     H

36/9   :  9/9

4         :    1

For \(C_3_6 H_9\) , the smallest whole number ratio is 4:1. So, the empirical formula for \(C_3_6 H_9\)  is \(C_4H\).

So, the empirical formula for \(C_3_6 H_9\) is \(C_4H\).

To know more about:-

https://brainly.com/question/14044066

In orther to have an charge of +2 an the atom (0 charge) needs to lose 2 electrons which elementary charge is -1. that way the atom 0 splits into the ion +2 and the two electrons 2x(-1) which mantein the charge balance