Merge branch 'master' of ssh://charles/tank/andrew/school/notes

diff --git a/chem/water.md b/chem/water.md
index 9635ed669e3f57625fe7f77ffd97ad536c79ce07..3b1ccf9d5ef6da938760d4c038ff9c8ede0ea374 100644 (file)
--- a/chem/water.md
+++ b/chem/water.md
@@ -73,3 +73,4 @@
 ## Concentration
 - amount of solute per volume of solvent - e.g. g / L
 - relative terms - "concentrated" or "dilute"
+- mg / L = ppm = $\mu$g / g