Question

Question #88d69

Answer 1

The sample contains 0.11 mol of `"CO"_2`.

Explanation:

We can use the Ideal Gas Law to solve this problem:.

`color(blue)(bar(ul(|color(white)(a/a)pV = nRTcolor(white)(a/a)|)))" "`

We can rearrange this equation to get

`n = (pV)/(RT)`

STP is defined as 1 bar and 0 °C.

Thus,

`p = "1 bar"`
`V = "2.5 L"`
`R = "0.083 14 bar·L·K"^"-1""mol"^"-1"`
`T = "(0 + 273.15) K" = "273.15 K"`

`n = (1 color(red)(cancel(color(black)("bar"))) × 2.5 color(red)(cancel(color(black)("L"))))/("0.083 14" color(red)(cancel(color(black)("bar·L·K"^"-1")))"mol"^"-1" × 273.15 color(red)(cancel(color(black)("K")))) = "0.11 mol"`