How does the law of conservation of mass apply to this reaction: CH + O2 + 2H2O + 2002? o Only the oxygen needs to be balanced. There are equal numbers of hydrogen and carbon
The law of conservation of mass has already been applied. There is an equal number of each element on both sides of
O the equation
Each element needs to be balanced
O
o
The equation needs to be balanced. There are fewer oxygen atoms in the equation than hydrogen or carbon

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.