The 3rd diagram is a mixture because it has 2 substances
Answer:
red supergiants is the answer
When writing an ionic compound formula, a "molecular" form is used. The formula is made with allowance for ion charges.
For example,
Ca²⁺ and NO₃⁻ ⇒ Ca(NO₃)₂
Al³⁺ and SO₄²⁻ ⇒ Al₂(SO₄)₃
72g H2O x 1 mol H2O/18.02g H2O = 3.99 mol H2O
The negative side of another magnet
