• Support PF! Buy your school textbooks, materials and every day products Here!

Calculate density A graduated cylinder

  • Thread starter danny411
  • Start date
  • #1
4
0
forgot how to calculate density

A graduated cylinder, when filled to the 40.00 mL mark with water (density 1.00g/mL)
and capped with a stopper, had a mass of 352.05 grams. The same cylinder had a rock of mass
37.40 grams placed into it and was re-filled to the 40.00 mL mark with water. The same cylinder
when stoppered (with the same stopper) now had a mass of 383.95 grams. What is the density of
the rock

37.4g/31.9ml

not sure if im doing volume correct
 

Answers and Replies

  • #2
4
0


is there a method to solving this?

I don't know how to get the displaced volume /
 
  • #3
274
3
Last edited by a moderator:
  • #4
Integral
Staff Emeritus
Science Advisor
Gold Member
7,198
55


If you dropped a rock into a cylinder the water level would rise. Why do you have to, or what do you mean, by refill it?
 
  • #5
Borek
Mentor
28,328
2,717


If you dropped a rock into a cylinder the water level would rise. Why do you have to, or what do you mean, by refill it?
These are two separate experiments, both start with empty cylinder.
 
  • #6
4
0


If you dropped a rock into a cylinder the water level would rise. Why do you have to, or what do you mean, by refill it?

not sure ?

don't know how much
 
  • #7
Borek
Mentor
28,328
2,717


You take an empty cylinder, you fill it with water to the 40 mL mark. You weight it. This is your first mass.

You take an empty cylinder, you put a rock in it, you fill it with water to the 40 mL mark. You weight it. This is your second mass.
 

Related Threads for: Calculate density A graduated cylinder

  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
5
Views
1K
Replies
6
Views
3K
Replies
3
Views
26K
Replies
8
Views
7K
  • Last Post
Replies
14
Views
3K
  • Last Post
Replies
21
Views
3K
  • Last Post
Replies
4
Views
8K
Top