a student finds a rock ont the way to school in the labratory he determines that the volume of the rock is 22.7 mL and the mass in 39.743 g what is the density of the rock
Density is mass over volume, so you can figure out the density by dividing 39.743 into 22.7. This gives you an answer of 1.75 (there's more, but I rounded off after because the next digit is a 0)