How many atoms are in a mol of Oxygen (O) atoms?

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

Choose all the answers that apply. fluorine (f) has an atomic number of 9 and an atomic weight of 18.99. fluorine has a. 9 protons b. 10 neutrons c. 18 electrons d. an atomic mass of 19 e. at least one isotope

Why is it incorrect to balance a chemical equation by changing the subscripts? explain.