2 C6H14 + 19 O2 - -> 12 CO2 + 14 H2O

Using the above reaction, how many moles of C6H14 are needed to produce 8.86 moles of water

1.27 moles (3 s. f.)

Explanation:

Mole ratio of water: C6H14

= 14:2

= 7:1

This means that to produce 7 moles of water, 1 mole of C6H14 is needed. Or 1/7 mole of C6H14 is needed to produce 1 mole of water. So if you need 8.86 moles of water, 8.86 (1/7) moles of C6H14 is needed.

For 8.86mol of water, moles of C6H14 needed

= 8.86/7

= 1.27 moles (3 s. f.)