The chemical formula 4NaOH represents ? molecules and ?
atoms.
Select one:
A. 12; 12
B. four; 12
C. one; three
D. four; three
please help

Convert .347 kilometers to miles show your work

Awhite powder is added to a solution. the images show observations made before the powder is added, just after the powder has been added, and a little while later. (the liquid in the small beaker is phenol red solution.) what evidence shows that a chemical change has taken place?

An unknown substance is a white solid at room temperature and has a melting point of 78 °c. which of the following substances is most likely to be the identity of the unknown sample?