Final answer:
The density of the mineral is 2.1 g/cm³.
Step-by-step explanation:
Density is the mass-to-volume ratio of a substance. To find the density of the mineral, we can use the formula:
Density = Mass/Volume
In this case, the mass is 4.2 grams and the volume is 2 milliliters. To make the units consistent, we need to convert milliliters to cubic centimeters (cm³) since 1 milliliter is equal to 1 cubic centimeter. So, the volume becomes 2 cm³.
Plugging the values into the formula, we get:
Density = 4.2 g / 2 cm³ = 2.1 g/cm³