How many atoms are there in 200. Grams of carbon? How many grams are there in 1.0 x 10^24 atoms of boron?
How many grams are there in 4.5 x 10^22 atoms of silver?
How many atoms are there in 9.34 grams of lithium
How many grams do 4.3 x 10^21 atoms of zinc weigh?

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 are transitions between a liquid and gas called? identify which way they are transitioning

In 2002, the rare earth elements mine in mountain pass, california was closed because