Answer:- Density of the substance is
.
Solution:- Density is directly proportional to mass and inversely proportional to volume. The density formula is:
![d=(M)/(V)](https://img.qammunity.org/2019/formulas/chemistry/college/vv8an5l2razt7y5yh72qjoqd06wvjmo3y0.png)
where d stands for density, M stands for mass and V stands for volume.
Given mass is 4.2 grams and the volume is 6 mL. Let's plug in the values of mass and volume in the formula to calculate the density.
![d=(4.2g)/(6mL)](https://img.qammunity.org/2019/formulas/chemistry/college/fh45k6zhh09f4cdm2bfz2umb1muz8a1lfo.png)
![d=0.7(g)/(mL)](https://img.qammunity.org/2019/formulas/chemistry/college/t6p0ipfr83rt91kxujaqjls1aeshgt6b7q.png)
So, the density of the substance is
.