 Okay, again, this I think is a problem that you could potentially do fairly quickly, okay? So this is just M1, V1, M2, V2, okay? So it says, you start with 6 molar nitric acid, 20 mils of it. What is the concentration, the final concentration if you dilute it to 0.400 liters, okay? So what you want to remember is M1, V1 equals M2, V2. So we're looking for M2. So M2 equals M1, V1 over V2, okay? So we've got to convert these to the same units, okay? So you could convert it to liters or milliliters. So this one to liters or this one to milliliters, whichever one you want. I'll just convert to mills. So again, pretty straightforward if you recall the M1, V1, M2. Do you think the hard problems that you're going to encounter well are here? Are there any questions on this one? I guess I should cut this video off. Okay.