A sample of 0.0550 g aluminum metal reacted with excess 6.0 M HCl. The following data was obtained when the hydrogen gas was collected in a gas collection tube over water.
2AI + 6HCI → 2AICI3+ 3H2

Volume of H, gas collected in gas measuring tube 79.55 ml
Height of water column in the gas measuring tube 5.31 cm
Barometric reading 75.58 cm Hg
H2 temperature 21.0 o C
Vapor pressure of water 26.2 torr
The density of Hg = 13.6 g/mL
Calculate the experimental molar volume at STP.

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metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

the answer is c i took the test