03/10/21

Calculate K for Rearranged equations
The equilibrium constant, Kc, for the following reaction is 11.5 at 345 K.2CH2Cl2(g) CH4(g) + CCl4(g)Calculate Kc at this temperature for the following reaction:1/2CH4(g) + 1/2CCl4(g) CH2Cl2(g)Kc = 
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03/10/21

For n = 3 and l = 2, give the sublevel designation, the allowable ml values, and the number of orbitals.
Sublevel designation:s, p, d, or f?Allowable ml values:0-1, 0, +1-2, -1, 0, +1, +2Or-3, -2, -1, 0, +1, +2, +3Number of orbitals:
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03/10/21

Manipulating K Expressions
Consider the reaction:C(s) + O2(g)CO2(g)Write the equilibrium constant for this reaction in terms of the equilibrium constants, Ka and Kb, for reactions a and b below: a.) C(s) + 1/2... more
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03/10/21

What is the molecular formula for a compound with 13.33% carbon, 4.44% hydrogen, 46.67% nitrogen, and 35.56% oxygen?
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03/10/21

Determine the mass of propane (C3H8) needed to fill 18.3 of space at STP
Determine the mass of propane (C3H8) needed to fill 18.3 L of space at STP
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03/10/21

Calculate the enthalpy change for the reaction: C6H4(OH)2(aq) + H2O2(aq) <—>C6H4O2(aq) + 2H2O(l)?
Calculate the enthalpy change for the reaction: C6H4(OH)2(aq) + H2O2(aq) <—> C6H4O2(aq) + 2H2O(l)given the following data:C6H4(OH)2(aq)-->C6H4O2(aq)+H2(g)  H= +174.4 kJH2O(g)-->H2O(l)... more
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03/10/21

For the reaction: 2H2(g) + O2(g) <—> 2H2O(g) H = -296 kJ
a) How much heat is evolved when 150 g of hydrogen is burned in excess oxygen? b) How much heat is evolved when 125 g of water is produced? c) How much heat is evolved when 5 g of hydrogen reacts... more
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03/10/21

What is the value of the equilibrium constant, Kc, at this constant temperature?
When 1.50 mol of CO2 and an excess of solid carbon are heated in a 20.0 L container to a high constant temperature, the equilibrium concentration of CO is 0.0776 M.C(s) + CO2(g)  ⇆ 2 CO(g)What is... more
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03/10/21

Chemistry Hw help

Calculate the molality of a solution having4.26mol of solute in 345g of solvent.
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03/10/21

What is the standard enthalpy change for the reaction?
(1) 2C(s) + 2H2(g)C2H4(g)...... ΔH° = 52.3 kJ(2) 2C(s) + 3H2(g)C2H6(g)......ΔH° = -84.7 kJ(3) C2H4(g) + H2(g)C2H6(g)......ΔH° = _kJ?
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03/10/21

What is the final temperature of the chromium?
A sample of solid chromium is heated with an electrical coil. If 72.1 Joules of energy are added to a 13.3 gram sample initially at 24.1°C
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03/10/21

Compute the root-mean-square speed of Ar molecules in a sample of argon gas at a temperature of 79°C.
__m s-1
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03/10/21

Calculate the wavelength, in nanometers, of the spectral line produced when an electron in a hydrogen atom undergoes the transition from the energy level 𝑛=3 to the level 𝑛=1.
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03/10/21

help question for chemistry

If a piston with a variable volume starts with a volume of 125.0 mL and pressure of 1.25 atm then expands to a new volume of 206.5 while the temperature remains constant, what is the new pressure?
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03/10/21

What is the maximum concentration of Ni²⁺ that can be added to a 0.00430 M solution of Na₂CO₃ before a precipitate will form? (Ksp for NiCO₃ is 1.30 × 10⁻⁷)
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03/10/21

What is the equilibrium constant for the solubility of FeCO₃ (Ksp = 2.1 × 10⁻¹¹) in NaCN? (Kf of Fe(CN)₆⁴⁻ is 1.5 × 10³⁵)
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03/10/21

What is the molar solubility of AgCl (Ksp = 1.80 × 10⁻¹⁰) in 0.560 M NH₃? (Kf of Ag(NH₃)₂⁺ is 1.7 × 10⁷)
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03/10/21

Determine if the following salt is neutral, acidic or basic.

If acidic or basic, write the appropriate equilibrium equation for the acid or base that exists when the salt is dissolved in aqueous solution. If neutral, simply write only NR.CH₃NH₃Cl
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03/09/21

properties of a gas will cause them to deviate from ideal gas behavior
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03/09/21

Calculate K from Equilibrium Concentrations: Heterogeneous
The equilibrium constant, Kc , for the following reaction is 5.10×10-6 at 548 K.NH4Cl(s) NH3(g) + HCl(g)If an equilibrium mixture of the three compounds in a 6.11 L container at 548 K... more
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03/09/21

Half-Lives and Radioactivity
50.0mg of potassium-45 was isolated in pure form. After one hour, only 3.125mg of the radioactive material was left. What is the half-life of potassium-45?
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03/09/21

In an electrolysis cell how many seconds are required to plate out 2.50 g of copper metal from a solution of CuSO4 that is electrolyzed using a current of 3.00 amps?
In an electrolysis cell how many seconds are required to plate out 2.50 g of copper metal from a solution of CuSO4 that is electrolyzed using a current of 3.00 amps?
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03/09/21

Instructions: Write below the complete ionic equation for the reaction of magnesium phosphate with lead (II) nitrate
Include which ions will be aqueous and which compound will precipitate.Valences: Mg=+2 Pb=+2PO4== -3 NO3=-1
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03/09/21

Determine the mass of O2(g) that can be produced from the unbalanced reaction
With steps, pleaseDetermine the mass of O2(g) that can be produced from the unbalanced reaction:Consider the mixing of 4.1 L of CO2(g) and 2.1 L of  H2O(g) at 33°C and 730 mm Hg. CO2(g) + H2O(g) =... more
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03/09/21

Chemistry Hw Help
Calculate the mole fraction of Ar in a mixture of 0.25 mol of He, 2.46 mol of Xe and 5.46mol of Ar.
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