Answer:

The question is incomplete; part of the data required in the question are shown:

Theoretical Yield: 2.05 g salicylic acid x (180g aspirin/1 mol) x (1 mol/138 g salicylic acid) 2. Mass of filter paper 2.56 g 3. Mass of filter paper and aspirin 5.42 g 4. Mass of aspirin (3-2) g. Percent Yield [(4)/(1)] x 100

Answer:

107%

Explanation:

We can calculate the theoretical yield as shown;

2.05g salicylic acid × 180g aspirin/1mol × 1 mol/138g of salicylic acid

Theoretical yield= 2.67 g of aspirin

Actual yield of aspirin is obtained from the experimental data;

Mass aspirin + filter paper= 5.42 g

Mass of filter paper= 2.56 g

Mass of aspirin= 5.42 g -2.56 g = 2.86 g

Hence actual yield of aspirin = 2.86 g

Percentage yield = actual yield/theoretical yield × 100

Percentage yield = 2.86/2.67 ×100 = 107%

A 9.70-g piece of solid CO 2 is allowed to sublime in a balloon. The final volume of the balloon is 1.00 L at 298 K. What is the pressure of the gas inside the balloon?a. 5.39 atmb. 2.37 102 atmc. 2.52 atmd. 0.186 atme. none of these

For the reaction shown, find the limiting reactant for each of the initial quantities of reactants.4Al(s) + 302(g) —> 2Al2O3(s)Express your answer as a chemical formula. 1 mol Al; 1 mol O2 4 mol Al; 2.5 mol O2 12 mol Al; 10 mol O2 15.4 mol Al; 10.7 mol O2

What volume of 0.335 molar hydrochloricacid solution would be required to neutral-ize completely 39 mL of 0.137 molar sodiumhydroxide solution?Answer in units of mL.

A 99.8 mL sample of a solution that is 12.0% KI by mass (d: 1.093 g/mL) is added to 96.7 mL of another solution that is 14.0% Pb(NO3)2 by mass (d: 1.134 g/mL). How many grams of PbI2 should form?Pb(NO3)2(aq) + 2 KI(aq) PbI2(s) + 2 KNO3(aq)

A cool, yellow-orange flame is used to heat the crucible. Would this affect the mass of the crucible? If so, how?

For the reaction shown, find the limiting reactant for each of the initial quantities of reactants.4Al(s) + 302(g) —> 2Al2O3(s)Express your answer as a chemical formula. 1 mol Al; 1 mol O2 4 mol Al; 2.5 mol O2 12 mol Al; 10 mol O2 15.4 mol Al; 10.7 mol O2

What volume of 0.335 molar hydrochloricacid solution would be required to neutral-ize completely 39 mL of 0.137 molar sodiumhydroxide solution?Answer in units of mL.

A 99.8 mL sample of a solution that is 12.0% KI by mass (d: 1.093 g/mL) is added to 96.7 mL of another solution that is 14.0% Pb(NO3)2 by mass (d: 1.134 g/mL). How many grams of PbI2 should form?Pb(NO3)2(aq) + 2 KI(aq) PbI2(s) + 2 KNO3(aq)

A cool, yellow-orange flame is used to heat the crucible. Would this affect the mass of the crucible? If so, how?

What mass of nitrogen gas is required to react completely with 2.79 g of hydrogen gas to produce ammonia?

the balanced equation for the formation of ammonia is as follows

N₂ + 3H₂ ---> 2NH₃

stoichiometry of H₂ to N₂ is 3:1

number of H₂ moles reacted - 2.79 g / 2 g/mol = 1.40 mol

if 3 mol of H₂ reacts with 1 mol of N₂

then 1.40 mol of H₂ reacts with - 1.40/3 = 0.467 mol of N₂

mass of N₂ required - 0.467 mol x 28 g/mol = 13.1 g

mass of N₂ formed is 13.1 g

N₂ + 3H₂ ---> 2NH₃

stoichiometry of H₂ to N₂ is 3:1

number of H₂ moles reacted - 2.79 g / 2 g/mol = 1.40 mol

if 3 mol of H₂ reacts with 1 mol of N₂

then 1.40 mol of H₂ reacts with - 1.40/3 = 0.467 mol of N₂

mass of N₂ required - 0.467 mol x 28 g/mol = 13.1 g

mass of N₂ formed is 13.1 g

A rigid container of gas has a pressure of 1.72 atm and temperature of 21 oC. If the temperature increases to 85 oC, what is the new pressure in atm?

**Answer:**

the new pressure is 2.09 atm

**Explanation:**

you have to use gay lussac's law so the formula is

p1/t1 = p2/t2

and convert C to Kelvin k=C+273.15

1.72atm/294.15 = p2/358.15

solve for p2 by multiplying 358.15 on both sides

p2=2.09 atm

What do lactate dehydrogenase, aspartate aminotransfcrase, and creatine kinase all have in common? a. they all are allosteric enzymes b. they are all zymogens c, they are all used to diagnose medical conditions d. they all function at abeornally high temperatures

**Answer:**

c. they are all used to diagnose medical conditions

**Explanation:**

Lactate dehydrogenase, aspartate aminotransfcrase, and creatine kinase all are used to diagnose medical conditions.

The standard free energy change for a reaction can be calculated using the equation ΔG∘′=−nFΔE∘′ ΔG∘′=−nFΔE∘′ where nn is the number of electrons transferred, FF is Faraday's constant, 96.5 kJ·mol−1·V−1, and ΔE∘′ΔE∘′ is the difference in reduction potential. For each of the given reactions, determine the number of electrons transferred (n)(n) and calculate standard free energy (ΔG∘′)(ΔG∘′) . Consider the half-reactions and overall reaction for reaction 1. half-reactions:fumarate 2−+2H+CoQH2↽−−⇀succinate−↽−−⇀CoQ+2H+ half-reactions:fumarate−+2H+↽−−⇀succinate2−CoQH2↽−−⇀CoQ+2H+ overall reaction:fumarate2−+CoQH2↽−−⇀succinate2−+CoQΔE∘′=−0.009 V

**Answer:**

**ΔG°′ = 1.737 KJ/mol**

**Explanation:**

The reaction involves the transfer of two electrons in the form of hydride ions from reduced coenzyme Q, CoQH₂ to fumarae to form succinate and oxidized coenzyme Q, CoQ.

The overall equation of reaction is as follows:

fumarate²⁻ + CoQH₂ ↽⇀ succinate²⁻ + CoQ ; ΔE∘′=−0.009 V

Using the equation for standard free energy change; ΔG°′ = −nFΔE°′

where n = 2; F = 96.5 KJ.V⁻¹.mol⁻¹; ΔE°′ = 0.009 V

ΔG°′ = - 2 * 96.5 KJ.V⁻¹.mol⁻¹ * 0.009 V

**ΔG°′ = 1.737 KJ/mol**

Write the expression for the equilibrium constant Kp for the following reaction. Enclose pressures in parentheses and do NOT write the chemical formula as a subscript. For example, enter (PNH3 )2 as (P NH3)2. If either the numerator or denominator is 1, please enter 1 2 MoO3(s) ↔ 2 MoO2(s) + O2(g)

The **expression** for the** equilibrium constant Kp** for the following **reaction** is

It refers to the **ratio** of the **concentration** of **products** to the **concentration** of **reactants** where each raised to the **power** of their** stoichiometric ratios. **It is expressed as K.

Since the given expression is

MoO3(s) ↔ 2 MoO2(s) + O2(g)

So, the above expression should be considered for constant kp

Learn more about **reaction** here; brainly.com/question/24185208

**Answer: **

**Explanation:**

**Equilibrium constant** is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as

is the constant of a certain reaction at equilibrium for gaseous reactants and products.

**For the given chemical reaction:**

The expression of for above equation follows:

As solids do not exert pressure, and are not involved.

The material the start all reactions are ______ and the materials that are formed are called _____.

Reactant and then product

**Answer:**

I think the second space is chemical bonds