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# A sample of seawater has a mass of 158 grams and a volume of 156ml what is its density?

###### Wiki User

###### September 13, 2007 12:00AM

Divide 158 by 156. The answer is the density in grams per ml. In this case, very close to 1 g/ml Density = MASS divided by VOLUME

## Related Questions

###### Asked in Math and Arithmetic, Chemistry

### Why is density used to identify substances instead of mass or volume?

Mass and volume are extensive properties, which are dependent
upon the size of the sample. A larger sample will have a greater
mass and volume than a smaller sample. Density is an intensive
property, which does not depend on the size of the sample. Density
is a ratio of mass to volume, which does not vary with the size of
the sample. The density of a larger sample will be the same as the
density of a smaller sample.

###### Asked in Physics, Chemistry

### How would you determine the density of a powdered dry sample which is soluble in water?

1. Apparent density:
- weight a graduated cyllinder
- put the sample in the graduated cyllinder up to a given volume
(note this volume)
- weight the graduated cyllinder with the sample
- calculate the mass of the powder by difference
- the density is the ratio mass of the sample/volume of the
sample
2. True density of a powder: you need a helium pycnometer.