Could you please help me out with this chemistry problem?? [a formula would be nice]?

Question

If a 2.5 mol sample of CH3CH2OH is burned. how many moles of water are produced?

could you please give me a hint of some sort PLEASE!!

thanks

♥godbless

Answer 1

Write a balanced equation.

First the UNbalanced equation-

CH3CH2OH + O2 --> H2O + CO2

Start to balance the equation. First the carbons-

CH3CH2OH + O2 --> H2O + 2CO2

Next balance the hydrogens-

CH3CH2OH + O2 --> 3H2O + 2CO2

Now balance the oxygens-

CH3CH2OH + 3O2 --> 3H2O + 2CO2

1 mole of CH3CH2OH produces 3 moles of H2O

You could have solved this by recognizing that CH3CH2OH contains 6 hydrogens per mole. All of the hydrogens will end up in H2O. You will need to produce 3 moles of H2O to utilize the 6 hydrogens in 1 mole of CH3CH2OH.

Answer 2

CH3CH2OH+ 7/2O2=2CO2+ 3H2O

The eqn suggests that,

1 mole of CH3CH2OH produces 3 moles of H2O

2.5 mole of CH3CH2OH produces (3*2.5) moles of H2O

                                                =7.5 moles of H2O (answer)

Answer 3

1)Write the equation for the reaction:

     C2H5OH +  3O2 -------->  2CO2 + 3H2O

2)From this we see that:

    1 mole ethanol(C2H5OH) produces 3 moles water(H2O)

    2.5 moles ethanol produces  3 * 2.5 moles water

    Moles water =  7.5 moles water.

Good Luck.

Answer 4

I count 6 moles of hydrogen there and since it's H2O it would be 6/2 = your hint