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Sagot :
Ammonia yields nitric oxide and water in the presence of oxygen. The mass of nitric acid that will be produced from 6.40 gm of oxygen is 4.8 grams.
What is mass?
Mass is the product of the moles of the substance and its molar mass. it is given as,
[tex]\rm mass = moles \times molar\; mass[/tex]
The balanced chemical reaction is shown as:
[tex]\rm 4NH_{3} + 5O_{2} \rightarrow 4NO + 6H_{2}O[/tex]
Moles of oxygen are calculated by mass, 6.40 gm as,
[tex]\begin{aligned} \rm moles &= \rm \dfrac{mass}{molar\; mass}\\\\&= \dfrac{6.40}{32}\\\\&= 0.2\;\rm moles \end{aligned}[/tex]
From the reaction, the molar ratio of nitric oxide to oxygen is 4: 5 and is used to calculate the moles of nitric oxide as,
[tex]0.2 \times \dfrac{4}{5} = 0.16[/tex]
0.16 moles and molar mass, 30 of nitric oxide is used to calculate the mass as,
[tex]0.16 \times 30 = 4.8 \;\rm gm[/tex]
Therefore, 4.8 grams of nitric oxide will be produced.
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