Question

2moles of nickel(iii) oxide decomposes forming nickel and oxygen gas. How many moles of nickel are there for every 3 moles of oxygen gas? Give only numerical value.

Answer 1

The chemical formula for nickel (iii) oxide is Ni2O3, so for every 3 moles of oxygen there are 2 moles of nickel

Answer 2

The chemical equation for the reaction of decomposition of 2 moles of Nickel(III) oxide forming nickel and oxygen gas is written as:

$Ni_2O_3\rightarrow Ni+O_2$

In order to balance the equation we will multiply $Ni_2O_3$ with 2 on reactant side and $Ni$ with 4 and $O_2$ with 3 on the product side. Thus, the balanced chemical equation is:

$2Ni_2O_3\rightarrow 4Ni+3O_2$

From the balanced equation, it is clear that 2 moles of $Ni_2O_3$ decomposes to give 4 moles of $Ni$ and 3 moles of $O_2$.

Hence, it is clear from the balanced equation that 4 moles of Nickel are there for every 3 moles of oxygen gas.