A virus has a mass of 9.0(10^-12)
and an oil tanker has a mass of 3.0 (10^7) kg
.

Use this information to answer the questions below. Be sure your answers have the correct number of significant digits.
What is the mass of 1 mole of viruses?
How many moles of viruses have a mass equal to the mass of an oil tanker?

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.