Posted by **Perrie** on Monday, July 8, 2013 at 5:50am.

1. A piece of rectangular wood that measures 3.0 cm by 6.0 cm by 4.0 cm has a mass of 80.0 grams. What is the density of the wood? Would the piece of wood float in water?

2. I threw a plastic ball in the pool for my dog to fetch. The mass of the ball was 125g. What must the volume be to have a density of 0.500 g/mL?

- Chemistry -
**Jai**, Monday, July 8, 2013 at 6:50am
#1.

Recall that the density of a material is just

d = m/V

where:

m = mass

V = volume

Also, the volume of a rectangular solid is given by

V = l*w*h

where:

l = length

w = width

h = height

Substituting,

d = 80 / (3*6*4)

d = 80 / 72

d = 1.11 g / cm^3

No, it will NOT float because the density of wood is greater than density of water (which is approximately 1 g /cm^3 at standard temperature & pressure)

#2.

d = m/V

V = m/d

V = 125 / 0.5

V = 250 mL

Hope this helps~ :)

## Answer This Question

## Related Questions

- science - a piece of wood that measures 3.0 cm by 4.0 cm by 5.0 cm has a mass of...
- math - A cube of wood measures 5 centimeters on a side and weighs 19 grams. What...
- Math - Bella sells a jewelry at a market. She cuts out a rectangular piece of ...
- Science - A piece of wood float on water and sinks in a methylated spirits .if ...
- chemistry - the density of a piece of wood is 0.638 g/cm3. The dimensions of the...
- English - 1. He is try to hit a piece of wood with an axe to cut it. (Is this ...
- science - If the density of a piece of wood and the density of water are exactly...
- physics - a piece of wood 50 cm long , 20 cm wide, 40 cm thick. its density is ...
- PHYSICS - A piece of wood is floating at the surface of some water as ...
- Physics - A block of wood, with density 828 kg/m3 , has a cubic shape with sides...

More Related Questions