How many moles of water can be produced from the reaction of 2.0 moles of hydrogen gas is reacted with 2.5 moles of oxygen gas? 2H2(G)+O2--->2H2O(L)
a. 5.0 mole H2O
b. 2.0 mole H2O
c. 4.5 mole H2O
d. 2.5 mole H2O

B.  2 moles of water

Explanation:

The reaction expression is given as shown below:

            2H₂   +    O₂   →    2H₂O  

Number of moles of Hydrogen gas  = 2 moles

Number of moles of oxygen gas  = 2.5moles

Unknown:

Number of moles of water produced  = ?

Solution:

To solve this problem, we need to find the limiting reactant because this reactant will determine the extent of the reaction.

   From the balanced reaction expression:

   2 mole of hydrogen gas will need to combine with 1 mole of oxygen gas

   But we have been given 2.5 moles of oxygen gas

Oxygen gas is in excess and hydrogen gas is the limiting reactant.

So;

       2 moles of hydrogen gas will produce 2 moles of water

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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.