Water is produced from the reaction of hydrogen and oxygen gas, according to the equation below. what is the excess reactant in the reaction of 4.2 moles of hydrogen with 3.0 moles of oxygen? 2h2(g) + o2(g) → 2h2o(l)

Oxygen is the excess reactant.

Explanation:

As can be seen from the given chemical equation, 2 moles of hydrogen gas react with 1 mole of oxygen gas.

4.2 moles of hydrogen gas react with of oxygen gas.

Thus hydrogen is the limiting reagent as it limits the formation of product. And oxygen is the excess reagent as it is present in excess. (3-2.1) = 0.9 moles of oxygen are left as such.

3 hours because it is a decent distance.

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.