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stellarik [79]
3 years ago
5

How many moles of nitrogen gas are there in 6.8 liters at room temperature and pressure (293 K and 100 kPa)?

Chemistry
1 answer:
kramer3 years ago
7 0
To solve this question, we will simply use the gas law which is as follows:

PV = nRT where:
P is the pressure = 100 kPa = 0.986923 atm
V is the volume = 6.8 liters
n is the required number of moles
R is the gas constant = 0.08206
T is the temperature = 25 degree celcius (room temp) = <span>298 kelvin

Substitute in the above equation to get the number of moles as follows:
</span> 0.986923 x 6.8 = n x 0.08206 x 298
n = 0.2744 moles
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Technetium (Tc; Z = 43) is a synthetic element used as a radioactive tracer in medical studies. A Tc atom emits a beta particle
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Question in incomplete, complete question is:

Technetium (Tc; Z = 43) is a synthetic element used as a radioactive tracer in medical studies. A Tc atom emits a beta particle (electron) with a kinetic energy (Ek) of 4.71\times 10^{-15}J . What is the de Broglie wavelength of this electron (Ek = ½mv²)?

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To calculate the wavelength of a particle, we use the equation given by De-Broglie's wavelength, which is:

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