A virus has a mass of $9\mathrm{.}0{10}^{-12}mg$ and an oil tanker has a mass of $3\mathrm{.}0{10}^{7}kg.$

Use this information to answer the question below. Be sure your answers have the correct number of significant digits.

How many moles of viruses have a mass equal to the mass of an oil tanker$?$