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M = n / V (moles per liter)
Molarity
2.000000
M
Formula
M = n / V
Where M is molarity (mol/L), n is moles of solute, V is volume in liters
1M solution means 1 mole of solute per liter - that's 6.022×10²³ molecules per liter!
Blood glucose is about 5 mM (millimolar) - doctors monitor this to detect diabetes
Seawater is about 0.6M NaCl - that's why it tastes so salty
A strong cup of coffee is roughly 10-15 mM caffeine - enough to wake you up
Car batteries use 4-5M sulfuric acid - highly concentrated and corrosive
IV saline is 0.154M NaCl - matched to blood osmolarity for safety
DNA in cells is at nanomolar concentrations - incredibly dilute but powerful
Beer is typically 0.7-1.5M ethanol - depending on alcohol content