01/18/21

Balancing redox reactions

Balance the following reaction in neutral medium by oxidation number method only.S2O32¯ + I3¯ ---> I¯ + S4O62¯
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01/18/21

Limiting reactants
Liquid hexane (CH3(CH2)4CH3) will react with gaseous oxygen (O2) to produce gaseous carbon dioxide (CO2) and gaseous water (H2O). Suppose 7.76 g of hexane is mixed with 16. g of oxygen. Calculate... more
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01/18/21

Stoichiometry Assignment Questions
I need help with my Stoichiometry Assignment, It's below.4 CH3NH2 + 9 O2 → 4 CO2 + 10 H20 + 2 N2if you start with 50 g CH3NH2a) How many grams of O2 will react?b) How many grams of CO2 will be... more
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01/17/21

chemistry gas reaction pressure results.
If 1.20 g of gaseous N2 react with 0.500 g of gaseous H2 in a 2.00-L closed container at 80.0 ℃, according to the equation shown below, what pressure does the gaseous NH3exert against the container... more
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01/17/21

How much air would have to be forced into the tank to increase the pressure, assuming no change in temperature?
An air storage tank whose volume is 110 liters contains 2kg of air at a pressure of 15 atmospheres. How much air would have to be forced into the tank to increase the pressure to 18 atmospheres... more
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01/17/21

gas occupying space and cooling pressure change
A gas occupies 1.75 L of space at 373 K. If the gas is cooled to 200 K and the pressure is constant, what will be the new volume?
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01/17/21

Bond enthalpies
Using the provided table of bond enthalpies, calculate the standard reation enthalpy for the following reaction:
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01/17/21

If a substance fails to rust or tarnish, does a physical or chemical change occur?
Rusting and tarnishing are two chemical changes that matter undergoes. If matter FAILS to rust or tarnish, would you say it has undergone a chemical or physical change?
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01/16/21

Chemistry piston compression volume results
A piston compresses a gas to 0.500 L, raising the pressure to 6.00 atm. If the gas remains at a constant temperature, what pressure would result when the volume is reduced to 0.400 L?
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01/16/21

How much TOTAL energy did the water take to boil away completely?
Mr. G is going to make some tea. He fills his kettle with 400 g of hot tap water at 49 degrees C, turns on the stove, and then leaves it on the stove for all of class. When he returns, he finds... more
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01/16/21

Gas equations pressure volume energy
A sample of helium gas occupies a volume of 0.50 L at a pressure of 0.95 atm. What volume will the gas occupy at a pressure of 1.50 atm if the temperature remains constant?
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01/16/21

pH of organic acids
Hi!I have started writing a lab report about a specific lab that I will be conducting on Wednesday, but before I do that lab I was hoping to finish writing down some background information in the... more
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01/15/21

The activation energy, Ea, for a particular reaction is 19.4 kJ/mol. If the rate constant at 80 °C is 0.820 M⁻¹s⁻¹, then what is the value of the rate constant at 339 °C? (R = 8.314 J/mol • K)
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01/15/21

The activation energy, Ea, for a particular reaction is 13.6 kJ/mol. If the rate constant at 754 °C is 24.5/min, at what temperature (in °C) will the rate constant be 14.9/min? (R = 8.314 J/mol • K)
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01/15/21

Zn+2HCL=ZnCL2+H2
What is the total mass of ZnCL2 produced when 195 g of Zn react completely with 216 g of HCL to produce 6g of H2?i got 51 g but i don’t think it’s right, how do i do this
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01/15/21

Identify the intermolecular forces in each of the following substances: a) HCl b) CH3CH3 c) CH3NH2 d) Kr
Identify the intermolecular forces in each of the following substances: a) HCl b) CH3CH3 c) CH3NH2 d) Kr
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01/15/21

Between CO2 and SO2 , only _____ will have dipole-dipole interaction because _____________________.
Between CO2 and SO2 , only _____ will have dipole-dipole interaction because _____________________.
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01/15/21

Write the following in the increasing order of boiling points:

Write the following in the increasing order of boiling points: a) H2S b) CH3CH3 c) CH3OH d) Ar
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01/15/21

Differentiate between organic acids
Hi!I have trouble figuring out how I should differentiate between benzoic acid and stearic acid. I've read on the internet that benzoic acid is not that soluble in water, but more soluble than... more
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01/15/21

2Al + 3Cl2 --> 2AlCl3 If 12.8 g of aluminum reacts with 39.1g of chlorine, how many g of AlCl3 forms? Also what is the limiting reactant(name only, not mass)
I dont understand the limiting reactant part on the homework
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01/15/21

2 Mg + O2 --> 2 MgO If 6.9 g of Mg react with 450 g of O2 what mass of product forms?
Im wondering how I should do this
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01/15/21

How does the vapor pressure of a solution compare with the vapor pressure solvent A in the pure state if the solute is more volatile than the solvent?
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01/15/21

How does the vapor pressure of solvent A in a solution compare with the vapor pressure of solvent A in the pure state? Does it matter whether solute B is volatile or nonvolatile?
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01/15/21

The kinetics of a gas phase reaction of the form A → Products results in a rate constant of 0.00781 M/min. For this reaction, the initial concentration of A is 0.501 M.
What is the order of the reaction? - Zero orderHow many minutes will it take for the concentration of A to reach 0.144 MWhat will the concentration of A be after 4.25 minutes?What is the half-life... more
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01/15/21

What is the concentration of A after 29.1 minutes for the reaction A → Products when the initial concentration of A is 0.750 M? (k = 0.0451 M⁻¹min⁻¹)
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