Most plastics are made from oil or natural gas. One step in making plastics from these resources is called cracking. Cracking is a process that breaks down bigger molecules into smaller ones. In one cracking reaction, ethane breaks down to become ethylene and hydrogen. During this process, thermal energy is absorbed from the surroundings and converted to chemical energy.

True or False

Answer:

0.017 moles of ammonia remains after the reaction is stopped.

Explanation:

The reaction is:

4NH₃  +  5O₂  →  4NO  +  6H₂O

The first step is to convert the mass to moles, of each reactant:

2 g .  1mol/ 17g = 0.117 moles of NH₃

4 g . 1mol /32g = 0.125 moles of O₂

Ammonia, states the question, is the excess reactant so we can confirm it,

5 moles of oxygen need 4 moles of ammonia to react (by stoichiometry)

Then, 0.125 moles of oxygen may react to (0.125 . 4) / 5 = 0.1 moles

As we have 0.117 moles of ammonia and we need 0.1 moles.

(0.117 - 0.1) = 0.017 moles remains after the reaction is completed.

If we convert the moles to mass we have:

0.017 mol . 17 g /1mol = 0.289 g

Glucose molecule is made up of six carbon atoms, twelve hydrogen atoms, and six oxygen atoms.

A glucose molecule is a simple sugar or monosaccharide with the chemical formula . The arrangement of atoms in glucose is a six-membered ring containing five carbon atoms and one oxygen atom.

Glucose is an essential source of energy for living organisms, and it is commonly found in many fruits, vegetables, and sweeteners. It can also be synthesized in the body through the breakdown of more complex carbohydrates such as starch or glycogen. Glucose is also used in various metabolic pathways in the body and is a precursor for the synthesis of other important biomolecules such as amino acids and fatty acids.

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A reaction which is exothermic and has an overall increase in entropy is

A) spontaneous only at high T

B) spontaneous only at low T

C) always spontaneous

D) spontaneous in the reverse direction.

The correct option is C) i.e., always spontaneous

Spontaneity is determined by the free energy. When ΔGΔG is negative, it is spontaneous.

ΔG=ΔH−TΔSΔG=ΔH−TΔS

The problem indicates that the ΔSΔS is positive. If the reaction is exothermic, this means that the ΔHΔH is negative.

ΔGΔG is going to be negative no matter the temperature.

A spontaneous process is one that occurs on its own, without any energy input from the outside. For example, a ball will roll down an incline; water will flow downhill; ice will melt into water; radioisotopes will decay, and the iron will rust.

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To determine the number of grams of Ag2S that could be obtained from the given mixture, we need to calculate the limiting reactant. The limiting reactant is the substance that is completely consumed in a chemical reaction, thereby determining the maximum amount of product that can be formed.

First, we need to convert the masses of Ag, H2S, and O2 into moles using their respective molar masses. The molar mass of Ag is 107.87 g/mol, H2S is 34.08 g/mol, and O2 is 32.00 g/mol.

For Ag:

0.95 g Ag * (1 mol Ag / 107.87 g Ag) = 0.00881 mol Ag

For H2S:

0.140 g H2S * (1 mol H2S / 34.08 g H2S) = 0.00410 mol H2S

For O2:

0.08 g O2 * (1 mol O2 / 32.00 g O2) = 0.00250 mol O2

Next, we compare the mole ratios in the balanced chemical equation to determine the limiting reactant. From the balanced equation, we can see that the ratio of Ag to Ag2S is 4:2. Therefore, the mole ratio of Ag to Ag2S is 4:2, or 2:1.

Since the mole ratio of Ag to Ag2S is 2:1, the limiting reactant is Ag. Therefore, the moles of Ag2S that could be obtained are equal to half the moles of Ag.

0.00881 mol Ag * (1 mol Ag2S / 2 mol Ag) = 0.00441 mol Ag2S

Finally, we calculate the mass of Ag2S using its molar mass, which is 247.80 g/mol.

0.00441 mol Ag2S * (247.80 g Ag2S / 1 mol Ag2S) = 1.09 g Ag2S

Therefore, from the given mixture, it is possible to obtain approximately 1.09 grams of Ag2S.

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Answer:

None of the above

Explanation:

Erikson's was a student of freud's and expanded of his theory of psychosexual development by emphasizing the importance of culture in parenting practices and motivations and adding three stages of adult development.

Answer

the first question is march im sure and the 2nd one is june the 3rd is the second answer hope this helps .!

Explanation:

Depending on the solubility at the temperature, 600 mL of saturated solution in NaCl must be prepare. Na₂HAsO₄ and Na₂SO₄ is the correct option.

The maximum amount of a chemical that will dissolve in a given amount of solvent at a given temperature is referred to as its solubility. Varying compounds have very different solubilities, which is a characteristic of a particular solute-solvent pair. The amount of a solute that dissolves in a specific volume of liquid is known as its solubility.

In terms of solubility, solute volume divided by solvent volume o

Saturated, unsaturated, and extremely saturated solutions are all possible.

The solubility of solutes increases as the temperature rises.

Depending on the solubility at the temperature, 600 mL of saturated solution in NaCl must be prepared.

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Answer:

C

Explanation:

Na2HAsO4 and Na2SO4

The example of always having rice available at every meal, passed down through generations, is an example of food selection based on cultural tradition and historical practices.

Food selection is influenced by various factors, including cultural traditions, historical practices, availability, and personal preferences. In this case, the consistent presence of rice in every meal within the family is an indication of food selection based on cultural tradition and historical practices. Rice has likely been a staple food in the family's culture for generations, and its inclusion in meals reflects the cultural significance and importance placed on rice as a dietary component.

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Answer:

2NO(g) + O2 ( 2NO2 In one experiment 0.866 mol of NO is mixed with 0.503 mol of O2. a)Determine the limiting reagent b) Calculate the number of moles of NO2 produced.

Explanation:

The standard potential for the given galvanic cell is +1.06 V.

To calculate the standard potential for the given galvanic cell, we need to determine the individual reduction potentials of the half-reactions and then subtract the potential of the anode (where oxidation occurs) from the potential of the cathode (where reduction occurs).

Given reduction half-reaction potentials:

Ag+(aq) + e^− → Ag(s): E∘ = +0.80 V

Ni2+(aq) + 2e^− → Ni(s): E∘ = -0.26 V

Since we have the reduction potentials for both half-reactions, we can directly calculate the standard potential for the cell:

E∘(cell) = E∘(cathode) - E∘(anode)

= E∘(Ag+(aq) + e^− → Ag(s)) - E∘(Ni2+(aq) + 2e^− → Ni(s))

E∘(cell) = +0.80 V - (-0.26 V)

= +1.06 V

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The new pressure of the gas can be calculated using the formula for the ideal gas law, which states that the product of pressure (P), volume (V), and temperature (T) is constant.

In this case, we can use the formula P1V1/T1 = P2V2/T2, where P1 is the initial pressure, V1 is the initial volume, T1 is the initial temperature, P2 is the new pressure, V2 is the new volume, and T2 is the new temperature
Using the formula P1V1/T1 = P2V2/T2, we can substitute the given values:

(100 kPa)(20 L)/(100 K) = P2(10 L)/(200 K)
Simplifying the equation:
2000 kPa/L = P2/20
Cross-multiplying:
P2 = (2000 kPa/L)(20)
P2 = 40000 kPa
Therefore, the new pressure of the gas is 40000 kPa.

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The correct formula of the molecule is C4H9O2.

The model of a compound is a representation of the molecule. It gives us an idea of what the molecule looks like as well as its molecular formula.

Looking at the structure of the compound as shown in the model in the question, the correct formula of the molecule is C4H9O2.

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Answer:C4H9O2.

Explanation:

When we talk about a compound like h3po4, we can break it down into its individual atoms to see how many of each are present. In h3po4, there are 3 hydrogen atoms (H), 1 phosphorus atom (P), and 4 oxygen atoms (O).

To determine how many moles of each are present in 1 mol of h3po4, we can use the concept of molar ratios. A molar ratio tells us how many moles of one substance are present for every 1 mole of another substance.

In this case, we want to find the molar ratio of H to h3po4, P to h3po4, and O to h3po4. Using the coefficients in the chemical formula, we can determine these ratios:

- H to h3po4: 3 moles H / 1 mole h3po4
- P to h3po4: 1 mole P / 1 mole h3po4
- O to h3po4: 4 moles O / 1 mole h3po4

Therefore, exactly 1 mol of h3po4 contains 3 moles of H, 1 mole of P, and 4 moles of O.

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There are 1.45 moles of CaCO3 in 8.74 x 1023 formula units of CaCO3.

Given information: Molecular formula of CaCO3 = 8.74 x 1023 formula units.Molar mass of CaCO3 = 100.086 g/mol.Number of moles of CaCO3 = ?The molecular formula unit of CaCO3 contains 1 calcium atom (Ca), 1 carbon atom (C), and 3 oxygen atoms (O). Hence, the molar mass of CaCO3 can be calculated as:Molar mass of CaCO3 = 1(40.078) + 1(12.011) + 3(15.999)Molar mass of CaCO3 = 40.078 + 12.011 + 47.997

Molar mass of CaCO3 = 100.086 g/mol Number of moles of CaCO3 can be calculated using the formula:Number of moles = Number of formula units / Avogadro's number Number of moles of CaCO3 = (8.74 x 1023) / (6.022 x 1023)Number of moles of CaCO3 = 1.45

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Answer:

Vibration.

Explanation:

Answer:

vibration best describes it

Explanation:

A solution with a pH of 3.47 has an [OH-] of 4.83 x 10^-11 M.

To find the [OH-] of a solution with a pH of 3.47, we can use the relationship between pH and [H+]. pH is defined as the negative logarithm of the hydrogen ion concentration [H+], and [OH-] and [H+] are related through the ion product constant of water, Kw = [H+][OH-] = 1.0 x 10^-14 at 25°C.
To start, we can use the equation for pH:
pH = -log[H+]
Rearranging this equation to solve for [H+], we get:
[H+] = 10^-pH
Substituting the given pH value of 3.47 into this equation, we get:
[H+] = 10^-3.47
[H+] = 2.07 x 10^-4 M
Now that we know the concentration of [H+] in the solution, we can use the ion product constant of water to find [OH-]:
Kw = [H+][OH-]
1.0 x 10^-14 = (2.07 x 10^-4)[OH-]
[OH-] = 4.83 x 10^-11 M
Therefore, a solution with a pH of 3.47 has an [OH-] of 4.83 x 10^-11 M.

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The mass of Fe₂O₃ formed from the  decomposition of 17.2g of Fe(OH)₃ , with yield assuming to be 40% is 5.14 g (upto three significant figures).

The reaction in which one reactant breaks down to form two or more different products is known as decomposition reaction.

The decomposition reaction of Fe(OH)₃ takes place as:

2Fe(OH)₃  (s) →   Fe₂O₃(s) + 3H₂O(g)

Firstly, we will find out the relative formula mass of Fe(OH)₃ and  Fe₂O₃.

The sum of the relative atomic masses of atoms present in a molecule is known as the relative formula mass of that molecule.

Relative formula mass of Fe(OH)₃

= ( 56+ 16×3+1×3)g

=(56+48+3)g

=107g

Relative formula mass of Fe₂O₃

=(56×2+16×3)g

=(112+48)g

=160g

From the equation we get,

2 × 107g  Fe(OH)₃ gives= 160g Fe₂O₃

∴ 17.2g Fe(OH)₃  will give

= (160×17.2)/(2×107) g  Fe₂O₃

=12.85 g Fe₂O₃

And, 40% yield

= 40/100 × 12.85

=5.14 g

Hence, assuming 40% yield, the mass of Fe₂O₃ formed from the decomposition of 17.2g of Fe(OH)₃ is 5.14 g

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Answer:

Safety equipment,medkit if something bad happen and material for that lab experiment

Explanation:

because if you dont have lab experiment material you can do lab experiment

The moles of gas in the bottle has been 0.021 mol.

The ideal gas has been given as the gas where there has been negligible amount of interatomic collisions. The ideal gas equation has been given as:

\(PV=nRT\)

The given gas has standard pressure, \(P=1\rm atm\)

The volume of the gas has been, \(V= 0. 500 \;\rm L\)

The temperature of the gas has been, \(T=15^\circ \text C\\ T=288\;\rm K\)

Substituting the values for the moles of gas, n:

\(\rm 1\;\times\; 0. 500 =\textit n\;\times\;0.08214\;atm.L/mol.K\;\times\;288\;K\\\\ \textit n=\dfrac{0. 500}{0.08214\;\times\;288} \;mol\\\\ \textit n=0.021\;mol\)

The moles of gas in the bottle has been 0.021 mol.

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Answer:

a.

Explanation:

Percent of ionization is defined as the ration of the equilibrium H3O- concentration to the initial concentration multiplied by 100 percent.

As the relation includes the initial concentration, the percent of ionization of a solution of a weak acid varies depending on the concentration of the solid. The percent of ionization decreases with increase in concentration of the acid. hundred percent ionization means complete ionization of solution.

here given is 0.0080m butanoic acid in solution containing 0.080m sodium butanoate. Ka of the solution is 1.5 .10-5.

               CH3CH2CH2COOH  <-->  H+ +CH3CH2CH2O-

initial        0.0080                             0           0.080

change     -X                                     +X           +X

final           0.0080-X                         X           0.080+X

Ka = [butanoic acid ] / [butanoate]

putting all values in this we get the X value. then x value is divided by the initial concentration of butanoic acid to find the percent of ionization.

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The equator is warmer because of the greater angle at which the sun's rays strike Earth's surface at the equator i.e. option D.

What do you mean by the Equator?

An Equator is a hypothetical line that circles a planet or other celestial body in the center.

As the climate at the poles is cooler than that close to the equator. This is because  Sun's rays are impinging at an angle on high latitudes due to the curvature of the Earth.

This is because as you walk away from the equator, the Earth's surface gradually tilts away from the sun (the sun is lower on the horizon).

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Zinc sulfate (ZnSO4) can serve as a good source of zinc for the body. It is a water-soluble salt that can provide zinc ions for absorption in the gastrointestinal tract.

Ingesting zinc ions has been shown to have some effect in reducing the length of a cold. Therefore, zinc sulfate can be an effective option for boosting zinc levels in the body and potentially supporting immune function during a cold.

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Answer:

Balanced Chemical Equation:

H3PO4 + 5HCl → PCl5 + 4H2O

The total number of protons are 6 and the total number of neutrons are 7 in an atom of the naturally occurring carbon isotope with the largest mass number.

Isotopes of almost all elements save hydrogen get their names from the mass number of their nuclei. Carbon atoms, for instance, have a mass number of 12 since the sum of their six protons and six neutrons equal 12. As a result, these atoms are referred to as carbon-12. The atomic mass of carbon atoms with seven neutrons is 13, which is equal to six protons plus seven neutrons. The isotope known as carbon-13 can be found in these atoms.

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Answer:

9.97×10⁻⁴ atm

Explanation:

Applying,

PV = nRT............... Equation 1

Where P = pressure, V = volume, n = number of moles of air, R = molar gas constant, T = Temperature.

make P the subject of the equation

P = nRT/V............ Equation 2

From the question,

Given: V = (11×12×8) ft³ = 1056 ft³ = (1056×28.3168) = 29902.5 L, T = 25°C = (25+273) = 298 K, n = 35.41/29 = 1.22 mole

Constant: R = 0.082 atm.L/K.mol

Substitute these values into equation 2

P = 1.22×0.082×298/29902.5

P = 9.97×10⁻⁴ atm

Answer:

As shown in the attachment,

Explanation:

Lavoisier believed in the caloric theory.

Caloric was a self-repelling fragment that adhered to matter. The heat was a mysterious fluid stored in the matter and liberate during burning and chemical reactions. Heat walk to cold. Hot objects had caloric and cold had little caloric.

The caloric theory is a disused scientific theory that heat consists of a self-resistant fluid called caloric that flows from hotter bodies to colder bodies. Caloric was also the notion of a weightless gas that could pass in and out of pores in solids and liquids.

So we can conclude that Caloric theory The caloric theory is an outworn scientific theory that heat consists of a fluid called caloric.

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It allows the beetles to escape from predators