## Sup_open~study 3 years ago 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?

1. Sup_open~study

i have no idea what to do :(

2. ajprincess

density=mass/volume

3. ajprincess

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

4. ajprincess

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

5. ajprincess

Can u find it?

6. Sup_open~study

a is 1139692528

7. Sup_open~study

??

8. ajprincess

hmm no. mass=1.2073*1044.55 =1261.085g

9. Sup_open~study

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

10. ajprincess

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?

11. Sup_open~study

yes thank you

12. ajprincess

yw:)

13. Sup_open~study

were is the volume at ???

14. ajprincess

sorry didnt get u?

15. Sup_open~study

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

16. ajprincess

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

17. ajprincess

Is it clear?

18. Sup_open~study

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

19. Sup_open~study

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

20. ajprincess

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