# A bottle that holds 250 grams of water holds only 175 grams of gasoline. What is the density of the gasoline? Take the density of water to be 1.0 g/ml

mass = volume x density. Rearrange to find

volume = mass/density

volume of the bottle = 250/1.00 = ??

Now that you know the volume, we know density of the gasoline is

density = mass/volume = 175/volume of the bottle from above.