Joanna fills a glass with 30 grams of water. she pours the water into a tray to make ice cubes. the tray has room to make 6 ice cubes. joanna is careful not to spill any of the water as she pours it into the tray with an equal amount in each cube of the tray. how much mass should each of the ice cubes have?

Hence, the mass of each ice cube is 5 grams.

Explanation:

Mass of water in Glass : 30 grams

Rooms available for ice cubes in a tray: 6

Joanna carefully pours out the water from the glass into ice tray without spilling the any water, so, the mass of the water in glass will get equally divided into 6 rooms.

Mass of the water in one cube =

Hence, the mass of each ice cube is 5 grams.

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.