La investigates while objects are attracted by a magnet. She losts a paper clip, a crayon, and a nal. She holds a magnet two centimeters away from the object being tested. Each time she tests an item, she uses a different magnet in what we did she make mistake setting up her investigation?
She should have tested a total of 10 tems
She should have used the same magnet in each trial
She should have tested only one tom in her investigation
She should have had the magnet a centimeter away from each item.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

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.

може ли да зареждате повече информация, моля

answer: mole of the gas

answer: mole of the gasexplanation: