Question

What is the mass of a substance whose density is 7.86 g/ml and volume is 6.5ml

Answer 1

Multiply the density by the volume

Since density is at g/mL you don't need to convert volume into L and just multiply it as mL

7.86g/mL x 6.5mL = 51.09g

Therefore the mass of the substance is 51.09g