s Block ElementshardNUMERICAL

How many moles of nitrogen dioxide () gas are evolved upon the complete thermal decomposition of of s Block Elements Chemistry Question

Question

How many moles of nitrogen dioxide ($NO_2$) gas are evolved upon the complete thermal decomposition of $2 \text{ moles}$ of anhydrous Lithium nitrate ($LiNO_3$)?

Answer: 2

💡 Solution & Explanation

The balanced thermal decomposition reaction for Lithium nitrate is: $4LiNO_3 \xrightarrow{\Delta} 2Li_2O + 4NO_2 \uparrow + O_2 \uparrow$. According to the stoichiometry, 4 moles of $LiNO_3$ produce 4 moles of $NO_2$. Therefore, 2 moles of $LiNO_3$ will produce exactly 2 moles of $NO_2$.

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