210.3 moles of H2 are contained in one gallon of H2O
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There are approximately 4.48 moles of hydrogen gas in a gallon at standard temperature and pressure (STP).
There are 5 moles of hydrogen in 2.5 moles of H2O, as each water molecule contains 2 hydrogen atoms.
There are 6 moles of hydrogen atoms in 3 moles of methane since the chemical formula for methane (CH4) contains four hydrogen atoms for every one carbon atom.
There are 9.12 moles of hydrogen atoms in 4.56 moles of NH2NH2. Each NH2NH2 molecule contains 2 hydrogen atoms.
There are 18 moles of hydrogen atoms in 2 moles of C8H18 because each mole of C8H18 contains 18 hydrogen atoms.
To find the number of moles of hydrogen gas, we first need to convert the mass of hydrogen gas from grams to moles using the molar mass of hydrogen gas (2 g/mol). 5.04 grams of hydrogen gas is equal to 5.04 g / 2 g/mol = 2.52 moles of hydrogen gas.