Question

Question #34103

Answer 1

See below.

Explanation:

First, convert °C into Kelvin ---> `28.20°C = 301.2K`

Use PV = nRT, plug in the given values and find n, or the number of moles of Krypton.

Since we are using atm for pressure, the R constant is 0.0821

(`11.2`atm)(`18.5L`) = `n(0.0821)(301.2K)` ---> `n = 8.379` moles of Krypton

Now you convert moles to grams:
(`8.379` moles Kr) `*` (`83.798` grams Kr `/ 1` mole Kr) ---> `~702` grams of Krypton**