Dalton's law

Dalton's law establishes that the partial pressure of a gas $i$ in a ideal mixture of gases at pressure $P$ is:

$P_{i}=X_{i}\,P$

where $X_{i}$ is the molar fraction of a gas Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle i} .