From f5b4c54862c987f8ffc1c8dda5c6c82a077648a3 Mon Sep 17 00:00:00 2001
From: Andrew Lorimer <andrew@lorimer.id.au>
Date: Mon, 4 Feb 2019 11:22:35 +1100
Subject: [PATCH] combined gas equation

---
 chem/gas.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/chem/gas.md b/chem/gas.md
index 4cd5689..1848d38 100644
--- a/chem/gas.md
+++ b/chem/gas.md
@@ -1,5 +1,9 @@
 # Gases
 
+## Comibned gas equation
+
+$${P_1 V_1 \over T_1} = {P_2 V_2 \over T_2}$$
+
 ## Perfect gas equation
 
 $$PV=nRT$$
-- 
2.43.2