Assertion: formic acid | /r/MadeOf | 4.4 wt % of hydrogen
Facets:
Source sentences:
text: It contains 4.4 wt % of hydrogen with a volumetric capacity of 53.4 g/L at standard temperature and pressure (STP).
text: Recently, scientists in Europe have identified formic acid as one of the most promising materials for hydrogen storage because formic acid is a liquid that contains 4.4 wt.% of hydrogen with a volumetric capacity of 53.4 g/l at standard temperature and pressure.  
text: Formic acid, containing 4.4 wt % of hydrogen and its conjugated base, formate salt, are a source of hydrogen widely used for transfer hydrogenation.