Question

If you have 144 moles of As , you need moles of NaOH use it all up

Answer 1

The number of moles of NaOH is 432 moles

Step-by-step explanation

Given information

`2\text{ As + 6NaOH }\rightarrow\text{ 2Na}_3AS_(O3)+\text{ 3H}_2`

The number of moles of As = 144 moles

Let x represents the number of moles of NaOH

From the above reaction, you will see that 2 moles of As react with 6 moles of NaOH

The next step is to find the number of moles of NaOH using a stoichiometry ratio

`\begin{gathered} 2\text{ moles of As }\rightarrow\text{ 6 moles of NaOH} \\ 144\text{ moles of As }\rightarrow\text{ x moles of NaOH} \\ \text{ Cross multiply} \\ 2\text{ }*\text{ x = 6 }*144 \\ 2x\text{ = 864} \\ \text{ Divide both sides by 2} \\ (2x)/(2)\text{ = }(864)/(2) \\ x\text{ = 432 moles} \end{gathered}`

Hence, the number of moles of NaOH is 432 moles