# Calculate density A graduated cylinder

• danny411
In summary, to calculate the density of the rock, you need to find the volume of water displaced by the rock, which can be calculated by subtracting the volume of water in the second experiment (40 mL) from the volume of water in the first experiment (also 40 mL). Then, divide the mass of the rock (37.4 g) by the volume of water displaced (31.9 mL) to get the density of the rock.

#### danny411

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 I am doing volume correct

is there a method to solving this?

I don't know how to get the displaced volume /

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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?

Integral said:
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?

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

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.

• Boparaigurpreet98