 Try not to. I try to be perfect. Is it going? Oh, okay. Well, everybody can hear me saying I try to be perfect. So, consider the reaction. This one's number 11 on the practice exam three. Consider the reaction between C7H16 liquid plus 11 oxygen gas goes to 7 carbon dioxide gas plus 8 waters. Delta H negative 4130 kilojoules, okay? So, how much energy is released when two moles of C7H16 are burned? Well, how many moles are being burned in this reaction? Just one mole, right? So, if we had, and this is how much energy is being released in it, so if we had two moles of it, what do you think the amount of energy is going to be? Just double that, right? So, the way to do this is delta H for two moles and equal 2.080.