Ammonia and oxygen produce nitrogen dioxide and water. What volume of nitrogen dioxide gas will be produced if 30.5 grams of ammonia is reacted with excess oxygen?
40.7 L of
There are four steps involved in this stoichiometry problem:
Step 1. Write the balanced chemical equation.
2. Convert grams of
The molar mass of
Step 3. Convert moles of
The molar ratio of
4. Use the Ideal Gas Law to calculate the volume of
The Ideal Gas Law is
#color(blue)(|bar(ul(color(white)(a/a) PV = nRTcolor(white)(a/a)|)))#, where #P#= the pressure of the gas, #V#= the volume of the gas, #n#= the number of moles of the gas, #R#= the universal gas constant #T#= the temperature of the gas
You don't give the pressure or temperature of the gas, so I will assume STP (100 kPa and 0 °C).
We can rearrange the Ideal Gas Law to get
#color(blue)(|bar(ul(color(white)(a/a)V= (nRT)/Pcolor(white)(a/a)|)))" "#
The volume of
Here's a useful video on mass-volume calculations.