What represents the different forms of electromagnetic radiation
1 answer:
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The question is incomplete, here is the complete question:
How many grams of helium must be released to reduce the pressure to 65 atm assuming ideal gas behavior. Note : 334-mL cylinder for use in chemistry lectures contains 5.209 g of helium at 23°C.
<u>Answer:</u> The mass of helium released is 1.6 grams
<u>Explanation:</u>
We are given:
Mass of helium in the cylinder = 5.209 g
To calculate the number of moles, we use the equation given by ideal gas equation:
PV = nRT
Or,
where,
P = Pressure of the gas = 65 atm
V = Volume of the gas = 334 mL = 0.334 L (Conversion factor: 1 L = 1000 mL)
w = Weight of the gas = ?
M = Molar mass of helium gas = 4 g/mol
R = Gas constant =
T = Temperature of the gas =
Putting values in above equation, we get:
Mass of helium released = (5.209 - 3.573) g = 1.636 g = 1.6 g
Hence, the mass of helium released is 1.6 grams
Answer:
Five signals exist in the spectrum of 4-methylpent-1-ene.
Explanation:
Nuclear Magnetic Resonance (NMR) is the main technique used by Scientists particularly by Chemists to elucidate the structure of compounds mainly organic compounds.
There are different NMR techniques which are used to characterize different NMR active nuclei like ¹H-NMR, ¹³C-NMR, ¹⁵N-NMR, ¹⁹F-NMR e.t.c.
In given case the compound will show five different signal for six carbon atoms. THis is because among the six carbon atoms two of them have same electronic environment means they are having same electron surrounding thus, they will share a signal at same ppm. Hence, the signals and each signal shown by each carbon atom is shown below.
