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# The density of methanol at $20^{\circ} \mathrm{C}$ is $0.791 \mathrm{g} / \mathrm{mL}$. What is the mass, in grams, of a 280 mL sample?

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other density problem. And obviously density is important in chemistry. And we're told that this is for methanol, that 0.791 grams of methanol, her one mil a liter. And that's at 20 degrees cells, Yes. So that's our density. And we're told, uh, that or basically we find out what we need to have 200 18 bill leaders, and we want to find out how many grams that is. So they say 280 milliliters. A. We simply multiply it by 0.791 grams for Miller. Later and again here, the middle leaders will cancel out. And so if you just do that multiplication, you get 200 in 21 grams. All right, so this is a pretty straightforward problem. We're just gonna multiply it. Ah, the amount by the density to get the mounting grams that we need, always, always, always make sure that your units canceling properly

University of Utah