Question #2494a
1 Answer
You need to use 14.7 g of sodium.
Explanation:
There are four steps involved in this stoichiometry problem:
- Write the balanced equation for the reaction.
- Use the Ideal Gas Law to calculate the moles of
#"H"_2# . - Use the molar ratio from the balanced equation to convert moles of
#"H"_2# to moles of#"Na"# . - Use the molar mass of
#"Na"# to convert moles of#"Na"_3# to grams of#"Na"# .
Let's get started.
Step 1. Write the balanced chemical equation.
Step 2. 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)|)))" "#
#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
We can rearrange the Ideal Gas Law to get
#color(blue)(bar(ul(|color(white)(a/a)n = (pV)/(RT)color(white)(a/a)|)))" "#
In this problem,
∴
Step 3. Convert moles of
The molar ratio of
Step 4. Convert moles of
The molar mass of
Here's a useful video on mass-volume conversions.