Alright, so the formula for density is d=m/v or in words, density is equal to the mass divided by the volume. Since grams (g) is a unit of mass, you will place that at the top of your fraction, and since mL is a unit of volume, it will be placed at the bottom. Your equation will look like D=6/30.0 mL When you answer the question, your unit will be g/mL. Hope this helps!
A sample of an unknown liquid has a volume of 30.0 mL and a mass of 6 g. What is its density? Show your work or explain how you determined this value.