Asample of aluminum is placed in a 25 ml graduated cylinder containing 10 ml of water. the level of water rises to 18 ml. aluminum has a density of 2.7 g/ml. calculate the mass of the sample
include explanation if possible

The mass of sample is 21.6 grams.

Explanation:

We are given:

Volume of cylinder without object, = 10 mL

Volume of cylinder with object, = 18 mL

Volume of object =

To calculate volume of a substance, we use the equation:

We are given:

Density of sample (aluminum) = 2.7 g/mL

Volume of sample (aluminum) = 8 mL

Putting values in above equation, we get:

Hence, the mass of sample is 21.6 grams.

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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.