12/01/21

What is the nuclear binding energy (in J) for a 56Fe nucleus?

The mass of a proton is 1.673 × 10-24 g. The mass of a neutron is The mass of the nucleus of an 56Fe atom is 9.286 × 10-23 g. 
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11/30/21

Chemistry help!!!
Nitrogen dioxide (NO2) is a pollutant that is primarily removed from the atmosphere by reaction with hydroxyl radicals (OH) to form nitric acid (HNO3). NO2(g)+OH(g)⟶HNO3(aq)How many grams of nitric... more
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11/30/21

Calculate Ecell at 25 ºC when the concentration of [Ni2+] = 3.11 x 10-4 M and [Co2+]= 5.28 x 10-5 M.
A voltaic cell consists of an Ni/Ni2+ half-cell and a Co/Co2+ half-cell.  The standard reduction potential for Ni2+ is -0.247V and for Co2+ is -0.277 V.
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11/30/21

What is the maximum yield in grams of Cl2 that can be produced by reacting 70.0g of KMnO4 with 75.0 g of HCl
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11/30/21

What is K for a reaction if ∆G° =150.8 kJ/mol at 25.0 °C?
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11/30/21

What is the empirical formula of 2.241 grams of nickel that are heated in air to produce 3.158 grams of nickel oxide.
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11/29/21

Calculate the potential for the following electrochemical cell Cu  Cu2+(0.05M) Cr2O72-(0.02M), Cr3+(0.005M), H+(0.1M) Pt
.    Calculate the potential for the following electrochemical cell                     Cu I Cu2+(0.05M) II Cr2O72-(0.02M), Cr3+(0.005M), H+(0.1M) I Pt
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11/29/21

the chemical formula for propane is: CH3 CH2 CH3 calculate the molar mass of propane.
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11/29/21

Limitations on reaction field
Determine the limiting reactant, the mass of water formed (in g), and the mass that remains of the excess reactant when 20.00 g of HCl reacts with 20.0 g of water.4CHl (g) + O2 (g) —> 2CL2 (g) +... more
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11/29/21

At 25 °C, how many dissociated OH− ions are there in 1285 mL of an aqueous solution whose pH is 1.23? number of OH− ions:
At 25 degree C, how many dissociated OH- ions are there in1285 ml of an aqueous solution whose pH is 1.23? Find the number of OH- ions
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11/28/21

Identify the elements or compounds in the following reaction that are oxidized and reduced. 4 Hg + SnO2 -----> 2 Hg2O + Sn
Then, identify the oxidizing agent and the reducing agent. Finally, identify the oxidation states of all elements in the reaction.
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11/28/21

Describe how you would, in a chemistry lab, dilute a 1.0 M sodium chloride solution to 0.113 M. Treat it like writing a procedure.
This answer should use words and calculations, and should include what kind of glassware you would use (there are many correct answers here).
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11/28/21

What is the concentration of a solution containing 37.9 mL of bromine diluted to 250 mL with water?
I don't know if the M1V1 = M2V2 equation would work.
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11/28/21

The enthalpy of solution (∆H) of KOH is -57.6 kJ/mol.
If 4.01 g KOH is dissolved in enough water to make a 150.0 mL solution, what is the change in temperature (°C) of the solution? (The specific heat capacity of the solution is 4.184 J/g･°C and the... more
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11/28/21

A 25.0 g block of copper (specific heat capacity 0.380 J/g･°C) at 54.0 °C is placed into 500.0 g of water initially at 20.0 °C.

What is the change in temperature (in °C) of the copper block? (The specific heat capacity of water is 4.184 J/g･°C).
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11/28/21

if you have 3.40 g of H2, how many grams of NH3 can be produced ?

N2(g) + 3H2(g) ———> 2NH3(g)if you have 3.40 g of H2, how many grams of NH3 can be produced ?
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11/28/21

Chemistry Questions
HA+H2O <=> H3O+ + A-Wh‎ich of the f‎ollowing is/ar‎‎e true w‎hen a w‎‎eak ac‎id H‎A is diss‎‎olved in water?I.             It wil‎l fo‎rm a dyn‎amic equilib‎rium, wh‎‎ere [H‎‎A] is e‎qu‎al to... more
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11/28/21

Chemistry Gas Law

How Do i rearange a equation for the combined Gas law if i am trying to find P2?
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11/27/21

Gases: Partial Pressure and Mole Fraction
A mixture of krypton and nitrogen gases at a total pressure of 927 mm Hg contains krypton at a partial pressure of 391 mm Hg. If the gas mixture contains 8.30 grams of krypton, how many grams... more
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11/27/21

Gases: Partial Pressure and Mole Fraction
A mixture of carbon dioxide and hydrogen gases contains carbon dioxide at a partial pressure of 319 mm Hg and hydrogen at a partial pressure of 646 mm Hg. What is the mole fraction of each gas in... more
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11/27/21

Calorimetry Questions
A stude‎‎nt was as‎‎ked to de‎‎termine the ent‎‎‎halpy of so‎‎lution of KC‎‎lO3 in wat‎‎‎‎er usi‎‎ng Sty‎‎rofoam calo‎‎rimetry. Calibr‎‎ation was perfo‎‎rmed by mix‎‎ing 8.0‎‎0 mL 0.0‎‎50 M H‎‎Cl... more
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11/26/21

Kinetic Theory Calculations

The rate of effusion of N2 gas through a porous barrier is observed to be 9.94*10-4 mol/h.Under the same conditions, the rate of effusion of SO2  gas would be  mol/h?
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11/26/21

Non ideal Gases
A 1.18-mol sample of krypton gas is maintained in a 0.662-L container at 306 K. Calculate the pressure of the gas using both the ideal gas law and the van der Waals equation (van der Waals... more
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11/26/21

what is K at 298 K for the reaction, C6F6(g) ⇌ 3C2F2(g)?
Given that the ∆G°f (kJ/mol) at 298 K for difluoroacetylene (C2F2) and hexafluorobenzene (C6F6) are 185.3 and 81.3 respectively, 
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11/26/21

The exothermic reaction 2NO2(g) <=> N2O4(g), is spontaneous...
at what temperature?high or low?
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