6. Calculate the molecular mass of acetylsalicylic acid (HOOC-C6H4-OOCCH3).

Answer:

Neon and helium

Explanation:

Recovery = (Weight of product recovered ÷ Theoretical yield) × 100% Recovery = (0.251 g ÷ 0.27594 g) × 100% Recovery = 91.08%Therefore, the % recovery of the reaction between 2,3-dimethyl-1,3-butadiene and maleic anhydride to form cyclic anhydride was 91.08%.

Diels-Alder Reaction   Diels-Alder reaction is a chemical process that joins a conjugated diene with a dienophile (a compound containing a double bond) to form a six-membered ring called a cyclohexene ring. It is a chemical reaction that can be used to make new carbon–carbon bonds. The reaction was discovered by two German scientists, Otto Diels and Kurt Alder, in 1928.In the Diels-Alder reaction between 2,3-dimethyl-1,3-butadiene and maleic anhydride to form cyclic anhydride, the % recovery was calculated using the following data:Weight of maleic anhydride used: 185 mg = 0.185 gVolume of diene used: 0.215 mLWeight of cyclic anhydride crystals recovered: 0.251 g% Recovery:We can calculate the percent recovery using the following formula:% Recovery = (Weight of product recovered ÷ Theoretical yield) × 100The theoretical yield of the product can be calculated from the balanced chemical equation as follows:2,3-dimethyl-1,3-butadiene + Maleic Anhydride → Cyclohexene-1,2-dicarboxylic AnhydrideThe molar mass of 2,3-dimethyl-1,3-butadiene is 68 g/mol. The molar mass of Maleic Anhydride is 98 g/mol. The molar mass of Cyclohexene-1,2-dicarboxylic Anhydride is 146 g/mol.Using these values, we can calculate the number of moles of each reactant: moles of diene used = (0.215 mL)(0.788 g/mL)/(68 g/mol) = 0.00248 mol moles of maleic anhydride used = 0.185 g/98 g/mol = 0.00189 mol The theoretical yield of cyclohexene-1,2-dicarboxylic anhydride = 0.00189 mol × 1 mol/1 mol = 0.00189 molThe theoretical yield of cyclohexene-1,2-dicarboxylic anhydride = 0.00189 mol × 146 g/mol = 0.27594 gNow, we can substitute these values into the percent recovery equation:% Recovery = (Weight of product recovered ÷ Theoretical yield) × 100% Recovery = (0.251 g ÷ 0.27594 g) × 100% Recovery = 91.08%Therefore, the % recovery of the reaction between 2,3-dimethyl-1,3-butadiene and maleic anhydride to form cyclic anhydride was 91.08%.

To know more about Diels-Alder Reaction visit :

brainly.com/question/30751490

#SPJ11

The solubility of AgCl(s) is more in tap water because of Q < K.

The solubility product constant (Ksp) for AgCl(s) is \(1.6 x 10^-10\). This means that in a saturated solution of AgCl(s), the product of the concentrations of Ag+ and Cl- ions is equal to Ksp.

In distilled water, the concentration of Cl- ions is negligible, so the ion product (Q) of Ag+ and Cl- ions in a saturated solution of AgCl(s) would be very small. Since Q < Ksp, the system is not at equilibrium and more AgCl(s) can dissolve to reach equilibrium.

In tap water, the concentration of Cl- ions is 0.010 M, which is much higher than in distilled water. Therefore, the ion product (Q) of Ag+ and Cl- ions in a saturated solution of AgCl(s) would be much closer to Ksp. Since Q is closer to Ksp, the system is closer to equilibrium and less AgCl(s) can dissolve.

Therefore, the solubility of AgCl(s) is more in distilled water than in tap water where the [Cl−] = 0.010 M.

To learn more about solubility  please visit-
https://brainly.com/question/29661360
#SPJ1

The physical quantity that is not used when determining the stoichiometry in this experiment is temperature.

Stoichiometry offers a way in which we can calculate the amount of reactants and products using mass - mole relationship. The mass of reactants, number of moles of reactant, mass of product and mass of precipitate can all be used to determine the stoichiometry.

However, the temperature of a reaction is not used to determine the stoichiometry of the reaction.

Learn more: https://brainly.com/question/17320375

Which physical quantity is NOT used when determining the stoichiometry in this experiment?

The types of non-covalent interactions that stabilize the tertiary structure of proteins are:
- Hydrogen bonds
- Ionic bonds
- Hydrophobic interactions

These interactions play a crucial role in maintaining the tertiary structure of proteins.

Hydrogen bonds are formed between the electronegative atoms of one amino acid and the hydrogen atoms of another amino acid.

Ionic bonds are formed between the positively charged and negatively charged amino acids.

Hydrophobic interactions occur between the nonpolar amino acids, which tend to cluster together in the interior of the protein to avoid contact with water.

All of these interactions work together to stabilize the tertiary structure of proteins.

Learn more about non covalent bond here: https://brainly.com/question/29639099

#SPJ11

The standard reaction entropy of N2(g) + 3 H2(g) → 2 NH3(g) is -196.3 J/K·mol.

What do you mean by standard reaction entropy?

Standard reaction entropy (ΔS°) is a measure of the disorder or randomness of a chemical reaction at a constant temperature and pressure. It is defined as the change in the entropy of the system when a reaction occurs under standard conditions. The standard state for a substance is its pure form at a pressure of 1 bar and a temperature of 25°C (298 K).

The standard reaction entropy (ΔS°) of a reaction can be calculated using the standard molar entropies (S°) of the reactants and products. The formula to calculate the standard reaction entropy is:

ΔS° = ΣS° (products) - ΣS° (reactants)

To calculate the standard reaction entropy for the reaction: N2(g) + 3 H2(g) → 2 NH3(g)

S° (N2) = 191.8 J/K·mol

S° (H2) = 130.6 J/K·mol

S° (NH3) = 192.5 J/K·mol

ΔS° = [2(S° (NH3)) - (S° (N2) + 3(S° (H2))]

ΔS° = [2(192.5) - (191.8 + 3(130.6))] J/K·mol

ΔS° = -196.3 J/K·mol

Hence, the standard reaction entropy of N2(g) + 3 H2(g) → 2 NH3(g) is -196.3 J/K·mol.

To learn more about standard reaction entropy from the given link:

https://brainly.com/question/16795263

#SPJ4

Answer:

B. Na+ and O2-

Explanation:

Na+ plus has 10 electrons and O2- also has 10 electrons

Answer:

Law

Explanation:

A law is a summary of observed (measurable) behavior, whereas a theory is an explanation of behavior. A law tells what happens; a theory (model) is our attempt to explain why it happens.

Use the van der Waals equation and the ideal gas equation to calculate the volume of 1.000 mol of neon at a pressure of 500.0 atm and a temperature of 355.0 K.

The Van der Waals equation, also known as the Van der Waals equation of state, is an equation of state used in chemistry and thermodynamics that extends the ideal gas law to take into account the effects of molecular interaction as well as the finite size of the molecules in a gas.

We may build a new equation that better reflects real gas behavior by modifying the ideal gas law to include corrections for interparticle attractions and particle volumes. The van der Waals equation can be used to determine a gas's properties under less-than-ideal circumstances.

To learn more about the van der Waals equation please visit
https://brainly.com/question/13201335
#SPJ4

To prepare 240 mL of two-thirds strength hydrogen peroxide solution for a wound irrigation using normal saline as the diluent, you need to mix 160 mL of full-strength hydrogen peroxide with 80 mL of normal saline.

This creates a total volume of 240 mL, with two-thirds of it being hydrogen peroxide and one-third being normal saline.

When using a hydrogen peroxide solution for wound irrigation, it is important to ensure that the concentration of the solution is appropriate for the type of wound being treated. Generally, hydrogen peroxide solutions of 2-3% concentration are used for wound irrigation. Higher concentrations can cause tissue damage and skin irritation.

Additionally, it is important to ensure that the diluent used is appropriate for the type of wound being treated. For example, normal saline is most commonly used for wound irrigation, but other diluents such as sterile water may be used for different types of wounds.

Learn more about hydrogen peroxide

https://brainly.com/question/25333163

#SPJ4

The number of moles present in the 1.2×10²⁴ molecules of the sample is 2 moles

The number of mole of the sugar in the sample containing 1.2×10²⁴ molecules can be obtained as follow:

From Avogadro's hypothesis,

6.022×10²³ molecules = 1 mole of NaCl

Therefore, we can say that

1.2×10²⁴ molecules = 1.2×10²⁴ / 6.022×10²³

3.011×10²³ molecules = 2 mole of sugar

Thus, the number of mole of sugar present is 2 mole

From the above calculation, we can see that we started with molecules and we ended in moles

Learn more about mole:

https://brainly.com/question/13314627

#SPJ1

Answer:potential energy

Explanation:

Answer:

Done and done

Explanation:

Answer:

See explanation

Explanation:

The mass of water, H₂O produced from the reaction is 72.06 g

We'll begin by calculating the mass of NH₄NO₃ that reacted and the mass of H₂O produced from the balanced equation.

NH₄NO₃ —> N₂O + 2H₂O

Molar mass of NH₄NO₃ = 80.03 g/mol

Mass of NH₄NO₃ from the balanced equation = 1 × 80.03 = 80.03 g

Molar mass of H₂O = 18.01 g/mol

Mass of H₂O from the balanced equation = 2 × 18.01 = 36.02 g

From the balanced equation above,

80.03 g of NH₄NO₃ reacted to produce 36.02 g of H₂O

Finally, we shall determine the mass of H₂O produced by the reaction of 160.1 g of NH₄NO₃.

From the balanced equation above,

80.03 g of NH₄NO₃ reacted to produce 36.02 g of H₂O.

Therefore,

160.1 g of NH₄NO₃ will react to produce = (160.1 × 36.02) / 80.03 = 72.06 g of H₂O.

Thus, the mass of water, H₂O produced from the reaction is 72.06 g

Learn more on stiochoimetry: https://brainly.com/question/15048051

Answer: Revoke the driver's license for at least 12 months

Explanation:

Chemical tests are used in order to measure the amount of drugs or alcohol that is in the body of a person when the person was arrested. To do this, samples of the urine or blood of the person can be taken and the result will be used to know if the person was driving under the influence of alcohol or not.

If the person refuse a legal chemical test issued by a law enforcement officer, the Division of Motor Vehicles is required to revoke the the driver's license of the person for at least 12 months.

The correct answer is D) In order for the rain water to evaporate, it requires heat from its surroundings.

When rain falls on surface , it evaporates due to the heat energy it absorbs from the surrounding environment. As the water evaporates, it takes in heat energy from the air, which results in a cooling effect. This is known as evaporative cooling. The heat energy required for the phase change from liquid to gas (evaporation) is taken from the surroundings, including the air in front of the building. As a result, the air temperature in front of the building decreases, creating a cooler sensation.

Learn more about surface  here:

https://brainly.com/question/1569007

#SPJ11

Answer: Compound . Chemical reactions can divide elements into simpler substances, but they cannot separate elements into simpler substances. Physical or chemical characteristics of substances can be categorised.

Compounds and elements can be created from pure substances. A chemical reaction is required to break down pure substances (elements and compounds) into their component atoms or elements. This is known as the chemical separation process. Physical separation of pure substances is impossible.

Explanation:

What makes something pure substance?

One element or a small number of related compounds make up pure substances. Mixtures are assemblages of many components. Mixtures of two or more substances (or elements) that cannot be visually distinguished from one another are referred to as homogeneous mixtures.

What sort of compound would that be?

A substance made up of two or more components is called a compound. Table salt, water, and carbon dioxide are a few examples of compounds

To know more about pure substance visit ;

https://brainly.com/question/24462192

#SPF4

Answer:

no

Explanation:

this experiment could not be replicated, because there are no specific measurements. the details would not be the same because it does not include the type of paper used nor the diameter, width or length. A guess of the measurements would be the only way to replicate this experiment but other then that, no you cannot.

According to fundamental thermodynamics, a material has more thermal energy the hotter it is. The heat required to raise the heat content of one mole of material by precisely one degree Celsius is known as the heat capacity or Cp. Here the specific heat of the metal is -0.312 J / g°C. The correct option is A.

The amount of energy needed to raise a material's heat content by precisely 1°C per gram is known as specific heat or Csp. Therefore, a substance's heat capacity is the amount of heat needed to raise its overall temperature by one degree.

The heat capacity is known as the specific heat capacity or the specific heat if the substance's mass is unity.

The equation is:

q = m × cΔT

c = q / mΔT

2421.6 / 90.0 (28.9 - 115.0) = -0.312 J / g°C

Thus the correct option is A.

To know more about specific heat, visit;

https://brainly.com/question/31608647

#SPJ1

The correct balanced chemical equation is FeCl₃(aq) + Na₂S(aq) → 3Fe₂S₃(s) + 3NaCl(aq)

To achieve a chemical equation's balance:

Fe₂S₃ (s) + NaCl (aq) FeCl₃ (aq) + Na₂2S (aq)

Let's start by balancing the atoms of iron (Fe). The iron atoms are already balanced, since there are two on the reactant side and two on the product side.

Let's now balance the atoms of sodium (Na). Two sodium atoms are present on the reactant side, hence two sodium atoms are required on the product side. By adding a coefficient of 2 in front of NaCl, we may do this:

Let's balance the sulfur (S) atoms lastly.

FeCl3(aq) + Na2S(aq) → 3Fe2S3(s) + 3NaCl(aq)

Learn more about chemical equation, here:

https://brainly.com/question/14457720

#SPJ1

Answer:

A. The chemical changes occurred because the chemicals changed.

Explanation:

When baking a cake several chemical reactions occur that change the chemical composition of the ingredients used in baking. An ingredient like baking powder releases carbon dioxide when it undergoes a temperature change in the oven. A chemical change is supposed to change the form of a substance.

An endothermic reaction also occurs when the ingredients absorb heat energy to produce several changes. The firmness of the cake occurs because of the heat absorbed by the proteinous content of the egg.

The concentration of Ag⁺ after the solution reaches equilibrium is almost equal to zero.

To find the concentration of Ag⁺ after the solution reaches equilibrium, we can use the following equilibrium equation:

Kf = [Ag(S₂O₃)₂³⁻]/([Ag⁺][S₂O₃)²⁻]).

Given Kf = 2.9 × 10¹³, initial [Ag⁺] = 2.9 × 10⁻⁴ M, and initial [S₂O₃²⁻] = 0.225 M, we can calculate the equilibrium concentration.

Let x be the amount of Ag⁺ that reacts with S₂O₃²⁻. At equilibrium, [Ag⁺] = 2.9 × 10⁻⁴ - x, [S₂O₃²⁻] = 0.225 - x, and [Ag(S₂O₃)₂³⁻] = x.

Now, we can substitute the equilibrium concentrations into the equation:

Kf = x/((2.9 × 10⁻⁴ - x)(0.225 - x))

2.9 × 10¹³ = x/((2.9 × 10⁻⁴ - x)(0.225 - x))

Given that Kf is very large (2.9 × 10¹³), we can assume that x is approximately equal to the initial concentration of Ag⁺ (2.9 × 10⁻⁴ M). Thus, the concentration of Ag⁺ at equilibrium is nearly zero.

Learn more about equilibrium concentration here: https://brainly.com/question/13414142

#SPJ11

We need 3.547 mL of 2.155 M KOH solution to titrate 25.00 mL of 0.3057 M HC3H5O2 solution. To determine the number of milliliters of 2.155 M KOH(aq) required to titrate 25.00 mL of 0.3057 M HC3H5O2(aq) (propionic acid), we need to use the balanced chemical equation between KOH and HC3H5O2.

The equation is:

KOH(aq) + HC3H5O2(aq) → KC3H5O2(aq) + H2O(l)

From the equation, we can see that 1 mole of KOH reacts with 1 mole of HC3H5O2. Therefore, the number of moles of HC3H5O2 in 25.00 mL of 0.3057 M solution is:

n(HC3H5O2) = M(HC3H5O2) × V(HC3H5O2) = 0.3057 mol/L × 0.02500 L = 0.0076435 mol

Since the stoichiometric ratio between KOH and HC3H5O2 is 1:1, we need 0.0076435 moles of KOH to react with the given amount of HC3H5O2. The number of milliliters of 2.155 M KOH solution required is:

V(KOH) = n(KOH) ÷ M(KOH) = 0.0076435 mol ÷ 2.155 mol/L = 0.003547 L or 3.547 mL (rounded to three significant figures)

Therefore, we need 3.547 mL of 2.155 M KOH solution to titrate 25.00 mL of 0.3057 M HC3H5O2 solution.

To know about solution:

https://brainly.com/question/1616939

#SPJ11

4.316 mL of 0.417 M HCl is required to titration 11.9 mL of 0.151 M NaOH.

\(HCl(aq) + NaOH(aq) \rightarrow NaCl(aq) + H_2O(l)\)

To determine the volume of 0.417 M HCl required to titrate 11.9 mL of 0.151 M NaOH, we need to use the stoichiometry of the balanced equation.

First, we find the number of moles of NaOH:

\(\( \text{Moles of NaOH} = \text{Volume} \times \text{Concentration} \)\)

\(\( \text{Moles of NaOH} = 0.0119 \, \text{L} \times 0.151 \, \text{mol/L} \)\)

\(\( \text{Moles of NaOH} = 0.0017989 \, \text{mol} \)\)

According to the balanced equation, the molar ratio between NaOH and HCl is 1:1. Therefore, the number of moles of HCl required is also 0.0017989 mol.

Now, we can calculate the volume of 0.417 M HCl needed:

\(\( \text{Volume of HCl} = \frac{\text{Moles of HCl}}{\text{Concentration}} \)\)

\(\( \text{Volume of HCl} = \frac{0.0017989 \, \text{mol}}{0.417 \, \text{mol/L}} \)\)

\(\( \text{Volume of HCl} = 0.004316 \, \text{L} \) or \( 4.316 \, \text{mL} \)\)

Therefore, 4.316 mL of 0.417 M HCl is required to titration 11.9 mL of 0.151 M NaOH.

Learn more about titration here:

brainly.com/question/31483031

#SPJ11

The signs of ΔH° and ΔS° must be positive and negative, respectively, for a reaction to be spontaneous at high temperatures but nonspontaneous at low temperatures.

The spontaneity of a reaction is determined by the Gibbs free energy change (ΔG). The Gibbs free energy change is related to the enthalpy change (ΔH) and entropy change (ΔS) of the system through the equation ΔG = ΔH - TΔS, where T is the temperature in Kelvin.

For a reaction to be spontaneous at high temperatures but nonspontaneous at low temperatures, the ΔH term should dominate at high temperatures, driving the reaction towards spontaneity. This implies that ΔH must be positive, indicating an endothermic reaction. This is because the positive ΔH term counteracts the negative TΔS term at high temperatures, allowing the reaction to proceed.

Similarly, the ΔS term should dominate at low temperatures, making the reaction nonspontaneous. For this to occur, ΔS must be negative, indicating a decrease in the system's entropy during the reaction. The negative ΔS term overwhelms the positive ΔH term at low temperatures, resulting in a positive ΔG and nonspontaneity.

Therefore, the signs of ΔH° and ΔS° must be positive and negative, respectively, for the described behavior of spontaneity at high temperatures and nonspontaneity at low temperatures.

To learn more about nonspontaneous, here

https://brainly.com/question/28855846

#SPJ4

Answer:

Explanation:

Volume of one mole of a gas = 22.4 litre.

No of molecules in one mole of gas = 6.02 x 10²³ .

Volume of one molecule = 4/3 π R³

= 4/3 x 3.14 x ( 167 x 10⁻¹² m )³

= 19.5 x 10⁶ x 10⁻³⁶ m³

=19.5 x 10⁻³⁰ m³

= 19.5 x 10⁻³⁰ x 10³ litre .

=  19.5 x 10⁻²⁷ litre .

So volume occupied by molecules in one mole of gas

= 19.5 x 10⁻²⁷ x 6.02 x 10²³  litre

117.4 x 10⁻⁴ litre

= .01174 litre.

Excluded volume

= ( 22.4 -  .01174  ) litre .

= 22.388 litre.