When electroplating silver (Ag) on iron (Fe) what is oxidized
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Silver gets oxidized when electroplating silver (Ag) on iron (Fe).
What is electroplating?
Electroplating is basically the process of plating a metal onto the other by hydrolysis mostly to prevent corrosion of metal or for decorative purposes.
Silver gets oxidized when electroplating silver (Ag) on iron (Fe).
In the process of putting a sliver coating on iron, the iron is the cathode on which the silver ions get reduced.
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The molar mass of nitrogen (N2) is 28.02 g/mol. What is the mass, in grams, of 4.60 mol of N2?0.1646.0923.4129
A student is running an experiment in which 60.3 grams of LiCl is needed, but the only jar of reagent in the lab is labelled lithium chloride monohydrate. How many grams of the hydrate must the student weigh out in order to get the desired amount of the anhydrous compound?
A solution has which of the following properties
Hypobromite is used to purify contaminated water. what is the formula for hypobromite
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The only other confusing thing about Hydrogen I can think of, is that you will almost never find it existing as a single Hydrogen, but as H2....
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Answer:
The Carnot engine operates based on the principles of the Carnot cycle, which is a theoretical idealized thermodynamic cycle. To calculate the work done by the engine, we need to use the formula for the efficiency of the Carnot cycle.
The efficiency of a Carnot engine is given by the equation:
Efficiency = 1 - (T2 / T1),
where T2 is the exhaust temperature in Kelvin and T1 is the burn temperature in Kelvin.
First, we need to convert the temperatures from Celsius to Kelvin.
The burn temperature is 1957 ˚C, so we add 273 to convert it to Kelvin:
T1 = 1957 + 273 = 2230 K.
The exhaust temperature is 500 ˚C, so we add 273 to convert it to Kelvin:
T2 = 500 + 273 = 773 K.
Now we can calculate the efficiency:
Efficiency = 1 - (T2 / T1) = 1 - (773 / 2230).
Next, we need to calculate the heat input, which is the energy released by burning 1 kg of methane.
The energy released by burning methane can be calculated using the heat of combustion of methane, which is -891 kJ/mol.
To convert this to joules per kilogram, we need to know the molar mass of methane, which is 16 g/mol.
1 kg of methane is equal to 1000 g, so the number of moles of methane in 1 kg is:
1000 g / 16 g/mol = 62.5 mol.
The heat released by burning 1 kg of methane is:
-891 kJ/mol * 62.5 mol = -55,687.5 kJ.
To convert this to joules, we multiply by 1000:
-55,687.5 kJ * 1000 = -55,687,500 J.
Now we can calculate the work done by the engine:
Work = Efficiency * Heat input.
Substituting the values we calculated:
Work = (1 - (773 / 2230)) * (-55,687,500 J).
Finally, we can calculate the work done by the engine in joules.
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This is known accuracy. Think of accuracy as like shooting at the bulls eye on a target.
However think of precision like if all your darts fell on the lower left side of the target. Precision is just how close together the measurements are with each other.
(2) 15 mL of HCl(aq) at 20.°C
(3) 10. mL of H2O(l) at 35°C
(4) 15 mL of H2O(l) at 30.°C
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Answer: The correct answer is option 3.
Explanation: Average kinetic energy is defined as the energy of motion of the particles of a system. It is a measure of Kelvin Temperature.
Mathematically,
where,
K = kinetic energy of the molecules measured in joules.
R = Gas constant =
= Avogadro's number =
T = Temperature in kelvins.
Kinetic energy is directly proportional to the temperature of the system.
More the temperature, more will be the kinetic energy of the molecules.
Hence, the correct answer is Option 3.
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Final answer:
An atom with six electrons in its valence shell will have two unpaired electrons. The four electrons will occupy two orbitals fully, while the remaining two electrons will each occupy one orbital in accordance with Hund's Rule.
Explanation:
An atom with six electrons in its valence shell typically belongs to group 16 on the periodic table. In this group, Oxygen is a perfect example having 'six valence' electrons but only 'two of them are unpaired'. The four electrons are arranging themselves in two fully occupied orbitals, while the remaining two electrons each occupy one orbital, following Hund's Rule, which states that orbitals in the same subshell fill with one electron first, with spins parallel, before they begin to pair up. Therefore, an atom with six electrons in its valence shell would have two unpaired electrons.
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Answer: 2
Explanation:
In order to have a complete shell, you need 8 total electrons.