The image represents a(n).

Answer is: 90 grams of water are produced.

Balanced chemical reaction: 2H₂ + O₂ → 2H₂O.
n(O₂) = 2.50 mol.
From chemical reaction: n(O₂) : n(H₂O) = 1 : 2.
n(H₂O) = 2 · 2.50 mol.
n(H₂O) = 5.00 mol; amount of substance.
M(H₂O) = 2 · 1 g/mol + 16 g/mol.
M(H₂O) = 18 g/mol; molar mass.
m(H₂O) = n(H₂O) · M(H₂O).
m(H₂O) = 5 mol · 18 g/mol.
m(H₂O) = 90 g; mass of substance.