What chemicals are represented in the image?

Summary:

• The image displays chemical formulas written on a chalkboard, likely related to chemistry lessons.

Chemicals Identified:

• SiO₂
• SO₃
• CrO₃
• Na₂SO₄
• Ca₂HPO
• AgCl
• HCl
• Cl₂
• H₂
• HI

Answer: The chemicals identified are SiO₂, SO₃, CrO₃, Na₂SO₄, Ca₂HPO, AgCl, HCl, Cl₂, H₂, and HI.