# Question #18bdd

May 19, 2015

That depends on the substance you're working with. The relationship between mass and volume goes through density, which is used express the mass of a substance per unit of volume.

$\text{density" = "mass"/"unit of volume}$

Take, for example, water. Water has a density of approximately $\text{1 g/mL}$ at room temperature. This tells you that 1 mL of water weighs exactly 1 g at room temperature.

Here's how other substances compare with water (note that $\text{1 cm"^3 = "1 mL}$)

Equal volumes of foam, diamond, and iron will have different weights because these substances have different densities. So, whenever you have to determine the mass of 1 mL of a substance, use its density.

May 25, 2015

its depends on density
density of any fluid is mass per unit volume
for example- density of water is 1g= 1ml.