I believe it’s Amphoteric oxide
It is Sublimation.I hope this helps
2Na + 2H₂O → 2NaOH + H₂
2 mol H₂O - 1 mol H₂
0.30 mol H₂O - x mol H₂
x=0.30*1/2= 0.15 mol
Mass of Oxygen : 8.0 g
<h3>Further explanation</h3>
Given
1.51 x 10²³ molecules of Oxygen(O₂)
Required
Mass of Oxygen
Solution
1 mol = 6.02 x 10²³ particles(molecules, atoms, ions)
Can be formulated :
N = n x No
n = moles
No = Avogadro's number
Find moles of Oxygen :
n = N/No
n = 1.51 x 10²³ / 6.02 x 10²³
n = 0.251
Mass of Oxygen :
mass = mol x MW O₂
mass = 0.251 x 32 g/mol
mass = 8.032≈ 8.0 g
