JOEFRESH10
14.10.2020 •
Chemistry
Ms. Morrison has a bad habit of buying cheap jewelry through Instagram ads. One particularly interesting pendant claimed to be made of “valuable metal,” but didn’t say which metal. Being the scientist that she was, Morrison wanted to determine if the ad was true and the metal was “valuable.” Using the water displacement method and an electronic balance, Ms. Morrison determined that the 50.00 g pendant had a volume of 4.753 cm³. Determine the density of the metal pendant. Show all your work and use the GUESS/GRASS method for full marks. [2A] Write your final answer only in this space. Your full solution will be uploaded in the space below.
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Ответ:
He
Explanation:
Movement of of gaseous molecules through tiny hole is called effusion.
At a given temperature, rate of effusion of gases is related with the molar mass (M) of the gases as:
Therefore, higher the molar mass of the gas, lower will the rate of effusion.
Molar mass of
= 70 g/mol
Molar mass of He = 4.0 g/mol
Molar mass of
= 32 g/mol
Molar mass of Ne = 20.17 g/mol
Since, molar mass of He is lowest among given, so rate of effusion of He will be the highest.