What is the density of a block of wood with a volume of 16.5 ml and mass of 6.39g?

The speed of light is around 6.706×10^8 miles per hour. what is the speed of light in units of miles per minute?

What substance has a mass of 9.5g and volume of 2.1cm^3

Does the number of ions in solution increase, decrease, or remain constant? it continuously decreases. it continuously increases. it decreases at first, then increases. it increases at first, then decreases.