How do I figure out the density?

Question

I just finished an online lab and I am not sure how to calculate the density. Here is the info i have from the lab:

the mass of water and a graduated cylinder=97.470g

the volume of water=10mL

the mass of the empty cylinder=87.470

i know the equation is d=m/v but do i take the total mass of the water AND the cylinder or do i subtract the mass of the water from that of the cylinder??? i'm confused! please help!!!

Answer 1

babe, u're trying to calculate the density of water right?

so ti should be like this:

mass of water = mass of water and a graduated cylinder - mass of empty cylinder = 10.0g

volume of water = 10mL = 10cm^3 [1ml=10cm^3]

so, density = 10.0g / 10cm^3 = 1g/cm^3

Answer 2

Why would you use the total mass of the water and cylinder? Do you want the density of the water and cylinder of just the density of water? Most likely you only want the density of the water so we just want the mass and volume of the water.

Mass of water=97.470 g-87.470 g=10.000 g

Density of water=mass of water/volume of water

D=10.000 g/10 mL=1.0 g/mL