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Chemistry

03/27/23

what is the heat required

How much heat (in joules) is required to raise the temperature of 50.0 mL of water from 17.3 °C to 34.7 °C? Answer to 1 decimal place with no units.

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Chemistry

03/27/23

A 10.0 mL sample of H2SO4 is titrated with 0.588 M NaOH. The initial buret volume is 0.05 mL and the final buret volume is 20.99 mL. What is the concentration (mol/L) of the H2SO4 sample? Answer to... more

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Chemistry

03/27/23

finding the concentration

A 10.0 mL sample of HCl is titrated with 0.105 M NaOH. The initial buret volume is 0.10 mL and the final buret volume is 20.38 mL. What is the concentration (mol/L) of the HCl sample? Answer to 3... more

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Chemistry

03/27/23

Assume the specific heat of the solution is equal to the specific heat of water.

When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter.In the laboratory a general chemistry student... more

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Chemistry

03/26/23

Phosphoglucoisomerase interconverts glucose 6 phosphate to, and from, glucose 1 phosphate.

After mixing equal amounts of the two molecules, the solution achieved equilibrium at 25 ∘C. The concentration at equilibrium of glucose 1‑phosphate is 0.01 M, and the concentration at... more

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Chemistry

03/26/23

Determine standard free energy change (ΔG∘), for the reaction NaOH + HCl -> H2O + NaCl when HCl = 1M, NaOH = 5M, H2O = 3M, and NaCl = 2M at 298 K and ΔG is at equilibrium. (R = 8.314 J/Kmol).

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Chemistry

03/26/23

Is it energetically favorable for ethanol combustion at 125 K, where change in enthalpy is 4000 J/mol and change in entropy is 50 J/Kmol? Why?

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Chemistry

03/26/23

Determine standard free energy change for the reaction ATP-> ADP + Pi when ATP = 10M, ADP = 5M and Pi = 5M, at 300 K and ΔG is at equilibrium. (R = 8.314 J/Kmol).

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Chemistry

03/26/23

Is it energetically favorable for nitrogen pentoxide to decompose at 350 K, where ΔH is 6000 J/mol and ΔS is 25 J/Kmol?

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Chemistry

03/26/23

What is the change in enthalpy of a system at 300 K, ΔS is 30 J/Kmol, and ΔG is at equilibrium?

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Chemistry

03/25/23

What is the free energy for this reaction?

At 565 K, ∆G° = -18.1 kJ/mol for the reaction A (g) + 2 B (g) → 3 C (g). If the partial pressures of A, B, and C are 1.21 atm, 3.25 atm, and 0.235 atm respectively, what is the free energy for this... more

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Chemistry

03/25/23

For the reaction A (g) → 3 B (g), Kp = 0.623 at 298 K. What is the value of ∆G for this reaction at 298 K when the partial pressures of A and B are 4.60 atm and 0.120 atm?

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Chemistry

03/25/23

What is the temperature at which this reaction would be at equilibrium assuming that enthalpy and entropy are independent of temperature?

Consider the following reaction at 25 °C: 5 SO₃(g) + 2 NH₃(g) → 2 NO(g) + 5 SO₂(g) + 3 H₂O(g) If ∆H° = 42.4 kJ./mol and ∆S° = 562.3 J/mol•K, estimate the temperature at which this reaction would be... more

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Chemistry

03/25/23

If a reaction is first order with a rate constant of 0.0450 s⁻¹, how much time is required for 65% of the initial quantity of reactant to be consumed?

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Chemistry

03/25/23

How long will it take for the concentration of A to decrease from 0.910 M to 0.205 for the reaction A → Products? (k = 0.153 M/s)

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Chemistry

03/25/23

One mole of Oxygen produces how many grams of H2O?

One mole of oxygen produces how many grams of H2O?

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Chemistry

03/24/23

HClO is a weak acid ( 𝐾a=4.0×10^−8 ) and so the salt NaClO acts as a weak base. What is the pH of a solution that is 0.020 M in NaClO at 25 °C? pH=

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Chemistry

03/24/23

Indicate the concentration of each ion present in the solution formed by mixing the following: 3.50 g of NaCl in 55.4 mL of 0.577 M CaCl2 solution

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Chemistry

03/24/23

Use stoicheometry

A certain sample of coal contains 1.4% sulfur by mass. When the coal is burned, the sulfur is converted to sulfur dioxide. To prevent air pollution, this sulfur dioxidr is treated with calcium... more

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Chemistry

03/24/23

Question in the description

An impure sample of magnesium is treated with an excess of sulfuric acid, if 0.114 g of hydrogen is obtained from 4.750 g of the sample, calculate the percent purity (percent Mg) of the sample.

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Chemistry

03/24/23

Question in the description

You are given a 2.00 g mixture of the compounds potassium chlorate and sodium chloride. Heating this mixture will cause the potassium chlorate to decompose as follows. 2KClO3 = 2KCl + 3O2. The NaCl... more

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Chemistry

03/24/23

How many mililiters of 0.250 M sodium hydroxide are required to react completely with 10.0 mL of 0.50 M sulfuric acid solution?

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Chemistry

03/24/23

Finding Average Atomic Mass

Hey there! So i have 3 different atomic masses and percentages. 1.) atomic mass: 75.23amu & 24.1%2.) atomic mass: 74.61amu & 48.7%3.) atomic mass: 75.2amu & 27.2%when i’m multiplying... more

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Chemistry Math

03/23/23

Calculate the activation energy, 𝐸a�a, in kilojoules per mole for a reaction at 70.0⁢ ∘C that has a rate constant of 0.272⁢ s−1 and a frequency factor of 1.18×1011 s−1.

Calculate the activation energy, 𝐸a�a, in kilojoules per mole for a reaction at 70.0⁢ ∘C that has a rate constant of 0.272⁢ s−1 and a frequency factor of 1.18×1011 s−1.𝐸a=�a=kJ/mol

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Chemistry Math

03/23/23

The rate constant for this first-order reaction is 0.0235 s−1 at 300 °C.

The rate constant for this first-order reaction is 0.0235 s−1 at 300 °C. A⟶productsIf the initial mass of A is 19.02 g, calculate the mass of A remaining after 1.41 min.mass of A: g

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what is the heat required

finding the Concentration

finding the concentration

Assume the specific heat of the solution is equal to the specific heat of water.

Phosphoglucoisomerase interconverts glucose 6 phosphate to, and from, glucose 1 phosphate.

Determine standard free energy change (ΔG∘), for the reaction NaOH + HCl -> H2O + NaCl when HCl = 1M, NaOH = 5M, H2O = 3M, and NaCl = 2M at 298 K and ΔG is at equilibrium. (R = 8.314 J/Kmol).

Is it energetically favorable for ethanol combustion at 125 K, where change in enthalpy is 4000 J/mol and change in entropy is 50 J/Kmol? Why?

Determine standard free energy change for the reaction ATP-> ADP + Pi when ATP = 10M, ADP = 5M and Pi = 5M, at 300 K and ΔG is at equilibrium. (R = 8.314 J/Kmol).

Is it energetically favorable for nitrogen pentoxide to decompose at 350 K, where ΔH is 6000 J/mol and ΔS is 25 J/Kmol?

What is the change in enthalpy of a system at 300 K, ΔS is 30 J/Kmol, and ΔG is at equilibrium?

What is the free energy for this reaction?

For the reaction A (g) → 3 B (g), Kp = 0.623 at 298 K. What is the value of ∆G for this reaction at 298 K when the partial pressures of A and B are 4.60 atm and 0.120 atm?

What is the temperature at which this reaction would be at equilibrium assuming that enthalpy and entropy are independent of temperature?

If a reaction is first order with a rate constant of 0.0450 s⁻¹, how much time is required for 65% of the initial quantity of reactant to be consumed?

How long will it take for the concentration of A to decrease from 0.910 M to 0.205 for the reaction A → Products? (k = 0.153 M/s)

One mole of Oxygen produces how many grams of H2O?

HClO is a weak acid ( 𝐾a=4.0×10^−8 ) and so the salt NaClO acts as a weak base. What is the pH of a solution that is 0.020 M in NaClO at 25 °C? pH=

Indicate the concentration of each ion present in the solution formed by mixing the following: 3.50 g of NaCl in 55.4 mL of 0.577 M CaCl2 solution

Use stoicheometry

Question in the description

Question in the description

How many mililiters of 0.250 M sodium hydroxide are required to react completely with 10.0 mL of 0.50 M sulfuric acid solution?

Finding Average Atomic Mass

Calculate the activation energy, 𝐸a�a, in kilojoules per mole for a reaction at 70.0⁢ ∘C that has a rate constant of 0.272⁢ s−1 and a frequency factor of 1.18×1011 s−1.

The rate constant for this first-order reaction is 0.0235 s−1 at 300 °C.

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