Question

How many grams of Ni are formed from 55.3 g of Ni2O3?

2Ni2O3(s)⟶4Ni(s)+3O2(g)

Answer 1

39.2 g

Step-by-step explanation:

• 2Ni₂O₃(s) ⟶ 4Ni(s) + 3O₂(g)

First we convert 55.3 grams of Ni₂O₃ into moles of Ni₂O₃, using its molar mass:

• 55.3 g ÷ 165.39 g/mol = 0.334 mol Ni₂O₃

Then we convert 0.334 moles of Ni₂O₃ into moles of Ni, using the stoichiometric coefficients of the balanced reaction:

• 0.334 mol Ni₂O₃ *
  `(4molNi)/(2molNi_2O_3)` = 0.668 mol Ni

Finally we calculate how much do 0.668 Ni moles weigh, using the molar mass of Ni :

• 0.668 mol Ni * 58.69 g/mol = 39.2 g