How many miles of cl- ions are needed to completely combine with 0.25 moles of mg-2 ions

Adrop of acetone (nail polish remover) has a mass of 35 mg and a density of 0.788 g/cm3. what is its volume in cubic centimeters?

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

How do you lengthen a pattern piece? (family and consumer science, sewing)