Barium is frequently utilized in spark plug electrodes. Identify whether barium is an element, compound, or mixture.

Determine whether a herbal decoction is a homogeneous or a heterogeneous mixture.

Rust, Fe₂O₃ • H₂O(s), is formed by the reaction of iron, Fe(s), and oxygen, O₂(g), in the presence of water, H₂O(l): 4 Fe(s) + 3 O₂(g) + 2 H₂O(l) → 2 Fe₂O₃ • H₂O(s)

Identify the elements and compounds in the reaction.

Identify which substance is a mixture

(i) sugar (C₆H₁₂O₆)

(ii) atmosphere

(iii) fruit salad

(iv) cinnamon sugar

Which of the following is not an example of matter?

Based on the given image, determine the incorrect statement