03/27/23

Br₂(g) ⇌ 2 Br･(g) Kp = 2.48 × 10⁻³ at 1650 °C. A 5.00 L vessel at 1650 °C is filled with Br₂(g) at an initial pressure of 5.00 atm equilibrium. Pressure (in atm) of Br･(g) at equilibrium?
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03/27/23

Based on zinc's and silver's placement on the activity series, which of these reactions should be spontaneous? Balance that equations.
Ag+ + Zn = Ag + Zn2+Zn2+ + Ag = Zn + Ag+
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03/27/23

A 55.0g sample of a metal at 100 degree C is dropped into 100.0g of water at 25.0 degrees the temperature of the water increases to 28.5 degrees C.

Determine the specific heat of the metal when the specific heat of water is 4.184 J/g degrees C
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03/27/23

Vaporizing 5.00g of H2O(l) requires 12.2 kj. What is the molar heat of vaporization of water when water's specific heat is 4.184 J/g degrees C
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03/27/23

2NaN3 (s) --> 3N2(g)+2Na(s) If an airbag fills with 3.75 mol of nitrogen gas, 1) How many moles of sodium azide are decomposed? 2) What is the mass of sodium produced?

I need the answer to part one and part 2 of this question.part one is: how many moles of sodium azide is decomposed?part two is: what is the mass of sodium produced?
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03/27/23

By what factor should you dilute the 1.00M NaOH stock solution so that you will reach the first equivalence point in about 10mL?
It takes 2.1 mL of 1.00M NaOH (aq) stock solution to reach the second equivalence point in a titration of 50.0mL of phosphoric acid solution. By what factor should you dilute the 1.00M NaOH stock... more
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03/27/23

What is the concentration of the phosphoric acid solution?
A student measures that it takes 7.21mL of 0.326 M NaOH (aq) solution to reach the first equivalence point of a titration of 100.0 mL of phosphoric acid solution. He also notes that it takes a... more
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03/27/23

how to find the specific heat
A 63.4-gram piece of metal is heated to 90.9 °C. It is placed into 50.0 g water with an initial temperature of 20.1 °C. After stirring, the final water temperature is 38.8 °C. What is the specific... more
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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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03/27/23

finding the Concentration
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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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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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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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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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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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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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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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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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?
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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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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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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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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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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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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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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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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