To convert grams to liters, you need to know the molar mass of hydrogen (H2) and the ideal gas law. The molar mass of H2 is 2.02 grams/mole. So 37.3 grams of H2 is equal to 37.3 / 2.02 = 18.5 moles.
The ideal gas law states that PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature (usually measured in Kelvins). If we assume standard temperature and pressure (STP), which is 0 degrees Celsius and 1 atmosphere, then R = 0.0821 Latm/molK.
So, at STP, we can calculate the volume of 18.5 moles of H2 as follows: V = (nRT) / P = (18.5 * 0.0821 * 273.15) / 1 = 4.8 Liters
Therefore, 37.3 grams of H2 is equal to 4.8 Liters.