Gold occurs in seawater at an average concentration of 1.1102 ppb. How many liters of seawater must be processedto recover 1 troy ounce of gold, assuming 81.5% efficiency (d of seawater= 1.025 g/mL; 1 troy ounce= 31.1 g)?

Q: How many moles of KI are in 9.06×10^24 formula units?

A: nmoles=NNAvagadro

Q: A certain reaction has an activation energy of 51.73 kJ/mol. At what Kelvin temperature will the…

A:

Q: Calculate ΔG° (kJ/mol) for a reaction whose equilibrium constant is 1.9 x 106 at 298 K. Report your…

A: Write the given values of the problem- Equilibrium constant(K) K=1.9×106 Temperature (T) T=298 K

Q: Consider the dissolution of CaCI2: CaCl2(s) Ca (aq) + 2CI (aq) AH = -81.5 kJ/mol A 15.0-g sample of…

A: Given compound is --> CaCl2  Amount of substance = 135 grams Amount of compound = 15 grams Atomic…

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A:

Q: gas-forming reaction produces 1.00 m3 of gas against a constant pressure of 119.0 kPa. Calculate…

A: Given: The produced volume of the gas is 1 m3. The pressure is 119 kPa.

Q: Calculate the total molecular translational energy at 25°C and 1.0 atm for (a) 1.00 mol of O2; (b)…

A:

Q: For an exothermic reaction * O both AH and AU are negative O only enthalpy change (AH)is negative O…

A: SOLUTION: Through the exothermic reactions energy is released in the form of light energy or heat…

Q: Calculate the rate constant, k, for a reaction at 50.0 °C that has an activation energy of 87.9…

A: Given data: The activation energy is E=87.9 kJ/mol. The temperature is T=50°C. The frequency factor…

Q: Consider air at P = 1.00 atm. The average molecular mass of air is approximately 29 u (atomic unit).…

A:

Q: A 5.0-L sample of sulfur hexafluoride (SF6) is stored at a temperature of 250.0 K and a pressure of…

A: Given: In the first case: Volume of the SF6  gas is 5 L. At temperature 250 K. Initial pressure 67…

Q: A quantity of 100.0 ml of 0.500 M HCI was mixed with 100.0 ml of 0.500 M NaOH in a constant pressure…

A: Given A quantity of 100.0 mL of 0.500 M HCl is mixed with 100 mL of 0.500 M NaOH in a…

Q: How many grams of sorbitol solution having a specific gravity of 1.285 and ho many grams…

A: How many grams of sorbitol solution having a specific gravity of 1.285 and how many grams…

Q: adioactive substance has a half life of 30 minutes. How much of a sample of this substance will not…

A: Given, No = 100%= 1 T= 30min t= 2.5 hours = 150 min We know that, N= No (1/2)t/T

Q: At what air temperature will exhaled breath condense by self-nucleation? Assume that a saturation…

A: Write the expression of saturation ratio. w=0.622pvpt-pv0.2326=0.622pv1 atm-pvpv=0.272 atm

Q: What is the concentration of a solution obtained by diluting 30 mL of a 45% w/v solution to a final…

A:

Q: What is the difference between fuel-injected gasoline engines and diesel engines?

A: Diesel engine and gasoline engines are internal combustion engines which convert the chemical energy…

Q: The following data are given for a biogas digester suitable for the output of six cows. The volume…

A: SOlution: given that Vd = 6 m3 Vg =4.1 m3

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Q: If 60% of U.S. petroleum use goes for transportation, and 1% of this goes for buses, how much oil…

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Q: Oxidation number of S in Na;SO3 is

A:

Q: How many kilojoules are released by freezing 32 g of H2O?

A: The heat released during the freezing is  H = m L  where, m is the mass and L is the latent heat of…

Q: The specific latent heat of vaporization of a particular liquid is 2.0 x 10 Jkg, its relative…

A: Given : Specific latent heat of vaporization, LVH  =  2.0x105J/Kg Relative molecular mass  =  30…

Q: How many curies are produced by 1.0 mol of 40K (t1/2=1.25x109yr)? How many becquerels?

A: Determine the decay constant for the 40K as follows. k=0.693t12=0.6931.25×109 yr=0.6931.25×109 yr365…

Q: How many tons of ice can a 20-ton ice plant produce in 24 hours at 5 degree F from raw water at 80…

A: The mass of the ice that can be produced in 24 hours is 12.672 ton.

Q: Compare between Electron Capture and Internal Conversion Processes

A: We need to compare between Electron capture and the Internal conversion process.

Q: The following data are given for a biogas digester suitable for the output of six COWS. The volume…

A: Given data: The volume of digester is Vd=7.5 m3. The volume of gas holder is Vg=2.2 m3. Retention…

Q: yeasts are able to produce high internal concentrations of glycerol to counteract the osmotic…

A: Solution of all the parts of question given in below step,

Q: ow that the elasticity of substitution for any homothetic production function is equal to the…

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Q: If the Enthalpy is given as H=exp(T/P), and if T=3165281.11 K, with P=2 E5 Pa, :then Cp is 9/2R 3/2R…

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Q: How many grams is 1.7 mol of N2? Round your answer to the nearest whole number.

A: We know that one mole of N2 is equal to 2×14g = 28g ; So, 1.7 mole of N2 will have

Q: Find the molarity of a KOH solution if 12ml of 0.3M HCI solution is neutralized by 21ml of KOH…

A: Molarity of HCL is 0.3 M Volume of HCL is V1 = 12 ml = 12 x 10-3 L Volume of KOH is V2 = 21 ml = 21…

Q: References] The rate law for the decomposition of phosphine (PH₂) is Д{РН,] =kPHy] At It takes 110.…

A:

Q: In co-generation which products in a combustion reaction do we use as input energy for another…

A: Co-generation is the process of combined source of heat and power, it is the process of production…

Q: If 10 kg of rock salt is placed in water, it dissolves at a rate proportional to theamount of salt…

A: Let the x be the amount of dissolved salt in the water. The undissolved amount of salt can be…

Q: The conversion of cyclopropane in the gas phase is a first-order reaction with a rate constant of…

A: The first order reaction is given by  where, Ro is the initial activity, R is the final activity, t…