# In a chemical reaction you collect 1L Hydrogen gas at STP. How many moles of hydrogen gas did you collect?

##### 1 Answer

#### Explanation:

In this question, we're given:

#p# , or pressure, of#"1 atm"# . We know this because it tells us that we're at STP.#V# , or volume, of#"1 L"# .#T# , or temperature, at#"273.15 K"# . We know this because it tells us that we're at STP.

We need to find

The Ideal Gas Equation relates all of these variables!:

We can rearrange this to only have

We know the value of

Now, we can just plug in the variables and solve:

We can verify that our answer is correct by plugging everything into the Ideal Gas Equation again and seeing if

Yay! :)