Good morning and welcome to Chemistry!

Today’s refresher is on density. Our old friend density is defined as a physical property of matter and can be described as the amount of mass per unit volume. Or, D=M/V.

If we use mass in grams (g) and volume in cubic centimeters (cm³) our density units will be in g/cm³ .

If you draw the “Triangle of Science” with D=M/V, all you have to remember is to put the mass in the top part of the triangle. The rest work out just fine.

So, three quick questions for practice:

1. What is the density of a sample of metal if the volume is 12 cm³ and its mass is 24 g?
2. Tin has a density of 7.31 g/cm³. If you have a 14.62 g sample of tin, what will be its volume?
3. If you have a 100 cm³ sample of tin what will be its mass?

Please show all your work on paper and send a picture of that paper to Mr. Brown in Remind. Include proper units in your final answer, of course.

Thank you.

Stay safe and stay Breezy!

T. Brown