A balloon holds 4.00L of gas at 296K and 1.00 atm.
How many moles of gas are in the balloon?

What is the maximum number of electrons that an atomic orbital can contain?

How does a hydroelectric power plant converts energy into energy.

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