Answer:
Unbalanced: SiO2 + HF = SiF4 + H2O
Explanation:
Unbalanced: SiO2 + HF = SiF4 + H2O
2.) coal is the correct answer!
Answer: first blank is heating second blank is pressure i think but i know that its NOT freezing
Explanation:
I did it and got it right
Answer:
The electrons that occupy the outermost shell of an atom are called valence electrons. Valence electrons are important because they determine how an atom will react. By writing an electron configuration, you'll be able to see how many electrons occupy the highest energy level .
6.022x10^23 is Avogadro’s number. Use this whenever you work with Stoichiometry involving Atoms, formula units, or molecules. 1 mol of anything is always Avogadro’s number.
Multiply everything on the top= 6.93 x 10^23
Divide by everything on the bottom = 6.93 x 10^23
Answer: 6.93 x 10^23 atoms Cu.