07/07/21

Which of the following processes has a ΔSsys > 0?
Which of the following processes has a ΔSsys > 0? CH4(g) + H2O(g) → CO(g) + 3 H2(g) Rb2CO3(s) + H2O(g) + CO2(g) → 2 RbHCO3(s) N2(g) + 3 H2(g) → 2 NH3(g) H2S(l) → H2S(s) All of the above... more
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07/07/21

What is ΔG°rxn?

Calculate the ΔG°rxn using the following information.2 HNO3(aq) + NO(g) → 3 NO2(g) + H2O(l) ΔG°rxn = ?ΔG°f (kJ/mol):  -110.9 (2 HNO3)  87.6 (NO(g))  51.3 (3 NO2(g))  -237.1 (H2O(l))
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07/07/21

When is the reaction spontaneous?

For a given reaction, ΔH = -26.6 kJ/mol and ΔS = 77.0 J/Kmol. The reaction is spontaneous at ________. Assume that ΔH and ΔS do not vary with temperature.
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07/06/21

Write the net ionic equation for the following molecular equation.
Pb(NO3)2(aq) + (NH4)2CO3(aq) PbCO3(s) + 2NH4NO3(aq)
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07/06/21

Write the net ionic equation for the precipitation of silver(I) phosphate from aqueous solution:
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07/06/21

What is the percent composition of KClO4?
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07/06/21

How to convert µg/ml in µM?
Hey guysI performed some cytotoxity assays using cisplatin recently and defined the IC50 in µg/ml (e.g. for one cell line I got 5.4 µg/ml). Now I would like to compare these values with ones... more
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07/06/21

Determine the vapour pressure when 2.20 mol of A and 4.30 mol of B are mixed. What is the composition of the vapour phase?
A mixture of liquids A and B forms an ideal solution. The vapour pressure of pureliquids A and B are 8000 Pa and 3600 Pa respectively at 350K.i) Determine the vapour pressure when 2.20 mol of A and... more
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07/05/21

What volume (in mL) of 0.2400 M HBr is required to neutralize 40.00 mL of 0.8000 M NaOH?
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07/05/21

determine the enthalpy for the reaction
Using the equations 2 C₆H₆ (l) + 15 O₂ (g) → 12 CO₂ (g) + 6 H₂O (g)∆H° = -6271 kJ/mol 2 H₂ (g) + O₂ (g) → 2 H₂O (g) ∆H° = -483.6 kJ/mol C (s) + O₂ (g) → CO₂ (g) ∆H° = -393.5 kJ/mol Determine the... more
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07/05/21

Compute the root-mean-square speed of Ne molecules in a sample of neon gas at a temperature of 141°C.
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07/05/21

When 7.101 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 21.76 grams of CO2 and 10.39 grams of H2O were produced.
In a separate experiment, the molar mass of the compound was found to be 86.18 g/mol. Determine the empirical formula and the molecular formula of the hydrocarbon.
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07/04/21

chemistry volume

If I have 21 liters of gas held at a pressure of 78 atm and a temperature of 900. K, what will be the volume of the gas if I decrease the pressure to 52 atm and decrease the temperature to 750 K?
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07/04/21

How many moles of hydrogen gas would be needed to react with excess carbon dioxide to produce 76.6 moles of water vapor

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07/04/21

Car engine combustion question
A car engine it is powered by the burning of octane (C8H18) with oxygen (O2). The combustion reaction forms carbon dioxide (CO2) and water (H2O).a) write a balanced chemical equation for this... more
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07/04/21

What is the pH?
A 175.0 mL sample of 0.20 M HF is titrated with 0.10 M CsOH. Determine the pH of the solution after the addition of 700.0 mL of CsOH. The Ka of HF is 6.8 × 10-4.
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07/04/21

What is the pH?
A 200.0 mL sample of 0.40 M Ba(OH)2 is titrated with 0.40 M HBr. Determine the pH of the solution after the addition of 400.0 mL HBr.
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07/04/21

What is the pH?
What is the pH of a buffer solution that is 0.120 M in hypochlorous acid (HClO) and 0.154 M in sodium hypochlorite? The Ka of hypochlorous acid is 2.9 × 10-8.
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07/03/21

A mixture of He, Ne, and At has a pressure of 26.0 atm at 28.0 C, If the partial pressure of He is 3.02 atm and the partial pressure of At is 2.17 atm, what is the partial pressure of Ne?

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07/03/21

The heat of vaporization of water is 40.66 kJ/mol. How much heat is absorbed when 3.12 g of water boils at atmospheric pressure?

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07/03/21

Thermo Chemistry
From the values of ΔH and ΔS predict which of the following reactions would be spontaneous at 25°C. Calculate the minimum temperature at which each reaction will become spontaneous.ΔH = -152... more
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07/03/21

Delta S Thermo Chem
Calculate ΔS° in J/mol K for the following reactions at 25.0°C using the standard entropies of the reactants and products.2CH_3OH(l)+3O_2(g)→2CO_2(g)+4H_2O(l)
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07/03/21

Equilibrium Constant
Calculate the equilibrium constant at 36.0 °C for each of the following reactions from the value of ΔG° = 14.4 kJ. I_2(s)+Cl_2(g)⟶2ICl(g)
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07/03/21

Thermo Chemistry
2CO(g) + O2(g) ↔ 2 CO2(g); ΔHo = -5182.2 kJ; ΔSo = 326.2 J/KCalculate ΔG in kJ
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07/03/21

Electro Chemistry
Calculate the non-standard cell potential (in V) for the following reaction at 887.79 ℃ with the following concentrations: [Mg^+2] = 6.50×10^−2 M; [Cu^+2] = 1.30×10^−5 MCu^+2(aq) + Mg(s) ---->... more
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