If you tripled the volume of your sample of chalk what would happen to the mass

The mass will also be tripled.

Explanation:

Density is defined as the mass contained per unit volume.

Density is characteristic of  a substance and it remains constant at a particular temperature.

If volume increases/decreases then mass also increases/decreases proportionally. Hence density remains constant.

Thus when volume of the sample is tripled , the mass will also increase thrice or become tripled.

helloi think dog cat bunny dog cat bunny dog cat bunny