Hello!
Your answer is .92 g/ml.
The equation for density is as follows: D=m/v (density=mass(in g) ÷ volume (in mL))
All you have to do is plug in your numbers (12g, and 13mL) and there you go!
Hope this helps now and in the future!
Brady
B. a sound wave that he could just barely hear
True x rays help you see broken bones right ?
Because the fossil show layers and those layers show what kind of settlements where left behind at that layer