A piece of word has a mass of 3.16 g; when placed in 20.0 mL of water, the water volume increased to 23.4 mL. What is the density of this piece of wood?

0.93g/mL

Explanation:

Given parameters

Mass of wood  = 3.16g

Initial volume of water  = 20mL

Volume of water + wood  = 23.4mL

Unknown:

Density of the wood  = ?

Solution:

Density is the mass per volume of a substance.

 It is mathematically expressed as;

       Density  =

Volume of wood = 23.4mL  - 20mL = 3.4mL

So,

    Density =   = 0.93g/mL