Answer:
![\boxed {\boxed {\sf d= 5 \ g/cm^3}}](https://img.qammunity.org/2021/formulas/physics/high-school/tkypojei91cvl1twtpaqgs5w7meanhu1vy.png)
Step-by-step explanation:
Density can be found by dividing the mass by the volume.
![d=(m)/(v)](https://img.qammunity.org/2021/formulas/social-studies/college/sm61tfevco049bqxe8o8eoklju47rhb835.png)
The mass of the quartz is 30 grams and the volume is 6 cubic centimeters.
![m=30 \ g \\v= 6 \ cm^3](https://img.qammunity.org/2021/formulas/physics/high-school/2asp29ntm8iiy2o2em3dmwba1v5dx8g3u7.png)
Substitute the values into the formula.
![d=(30 \ g)/(6 \ cm^3)](https://img.qammunity.org/2021/formulas/physics/high-school/pflljxrry7ler0h35e59hsuzz2mh4jybom.png)
Divide.
![d= 5 \ g/cm^3](https://img.qammunity.org/2021/formulas/chemistry/high-school/h83k7z8dr2krh106c1zwznhyabiudtk2we.png)
The density of this piece of quartz is 5 grams per cubic centimeter.