Calculate density A graduated cylinder

  • Thread starter danny411
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  • #1
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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
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is there a method to solving this?

I don't know how to get the displaced volume /
 
  • #3
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  • #4
Integral
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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
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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
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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
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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.
 
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