 Okay, so the procedure calls for us to weigh 0.4 grams of our unknown, so we're going to demonstrate how to weigh something right now. So the first thing we're going to do is go to the balance and push on, and you can see there that the balance is 0.00 and the arrow is pointing to the G there which stands for grams. Then we're going to put our weight boat on there, so we've got a weight boat here, this is what a weight boat looks like, we're going to put it on there. Notice it tells us the mass of the weight boat about 0.98 grams there, so we're going to push this button here, it says tear, and that's going to tell the balance to not worry about how much that weighs. Okay, so we can just put stuff in that weight boat and see what the substance weighs. Okay, so as you can see when I put more and more in, the balance shows an increase in mass, almost there, and as you can see the balance is now indicating a mass of 0.4 grams. So now just take the weight boat off, notice it's discounting how much the weight boat called for or how much the weight boat weighed, we can push tear again and get it back to 0.00 and then push the off button and turn it off.