Apiece of wood that measures 3.0 cm by 6.0 cm has a mass of 80.0 grams. what is the density of the wood. would it float?

1.111 g/cm³- Will not float

Explanation:

But; Volume = length × width × height

Volume of the wood = 3.0 cm × 4.0 cm × 6.0 cm

                                  = 72 cm³

Therefore;

Density = 80.0 g ÷ 72 cm³

           = 1.111 g/cm³

The density of the piece of the wood is 1.111 g/cm³ and will therefore, will NOT float  since it has a higher density than water.

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)