What is a volcanoe the is not currently erupting but have done so in the pass

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

What three natural resources are found in the great lakes region