# A rock is placedin 10-mL of watercausing the waterlevel to rise to 25-mL. The same rockhas amass of 7grams. What is thedensity

1 answer

###### Question:

A rock is placed in 10-mL of water

causing the water

level to rise to 25-

mL. The same rock

has amass of 7

grams. What is the

density of the rock

causing the water

level to rise to 25-

mL. The same rock

has amass of 7

grams. What is the

density of the rock

## Answers

d ≈ 0.47

Explanation:

Density is represented by the ratio of mass to volume. We are given the mass (7 grams), but we need the volume.

The volume can be calculated by subtracting the new volume from the old volume.

25 mL - 10 mL = 15 mL

The volume is 15 mL and the mass is 7 grams. Now, set up the ratio. Remember, d = m/v.

d = 7/15

d ≈ 0.47

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