The density of a particular rock is 1.2073 g/cm(3)

a. How many grams of the rock are contained in a 1044.55-cm(3) sample of the rock?

b. How many cm(3) will be occupied by 278.816 g of the rock?

Question

The density of a particular rock is 1.2073 g/cm(3)

a. How many grams of the rock are contained in a 1044.55-cm(3) sample of the rock? 

b. How many cm(3) will be occupied by 278.816 g of the rock?

sup_open~study · Answer

i have no idea what to do :(

ajprincess · Answer

density=mass/volume

ajprincess · Answer

a)
1.2073g/cm^3=mass in gram/1044.55cm^3

ajprincess · Answer

b)
1.2073g/cm^3=278.816 g /volume in cm^3

ajprincess · Answer

Can u find it?

sup_open~study · Answer

a is 1139692528

sup_open~study · Answer

??

ajprincess · Answer

hmm no.
mass=1.2073*1044.55
        =1261.085g

sup_open~study · Answer

i'm sorry i have no idea on how to do this :(

ajprincess · Answer

density=mass/volume
If u know the values of density and volume and want to find the value of mass
u hav to multiply the values of density and volume.
mass=density*volume
If u know the values of density and mass and want to find the value of volume
u hav to divide the value of mass by the value of density .
volume=mass/density
Is it clear?

sup_open~study · Answer

yes thank you

ajprincess · Answer

yw:)

sup_open~study · Answer

were is the volume at ???

ajprincess · Answer

sorry didnt get u?

sup_open~study · Answer

i mean how would i find the values of density ???

ajprincess · Answer

If u know the values of mass and volume and want to find the value of density u hav to divide the value of mass by the value of volume
density=mass/volume

ajprincess · Answer

Is it clear?

sup_open~study · Answer

i don't know the values of mass and value shood there 
 be a chart telling you what they are ???

sup_open~study · Answer

thank you for your help i will try to go before school tomorrow and ask for some help i have a horrible chem teacher pretty much the whole class is failing her including me xD

ajprincess · Answer

in the a)part of the question u r asked to find the value of mass.
the values of density and the volume are given to u.
density=1.2073 g/cm^3
volume=1044.55cm^3
To find the value of mass
use
mass=volume*density
        =1044.55cm^3*1.2073 g/cm^3
in the b)part of the question u r asked to find the value of volume.
the values of density and the mass are given to u.
density=1.2073 g/cm^3
mass=278.816 g
To find the value of mass
use
volume=mass/density
        =278.816 g/1.2073 g/cm^3