Use the problem below to answer the question: how many grams of h2 would be formed if 34 grams of carbon reacted with an unlimited amount of h2o? the reaction is: c + h2o → co + h2 the equation is balanced. the starting substance is carbon, c. the ending substance is hydrogen, h2. using the periodic table, find the molecular mass of h2. h2 = g/mole

34g C * ( 1 mol / 12.0107 ) * ( 1 mol H2 / 1 mol C ) * ( 2.01588 g / 1 mol H2 ) = 5.70657164028741 g H2 = 5.7 g H2

Convert grams of C to moles of C using the given amount of grams and the molar mass ( 12.0107 g/mol ).

Gather the mole ratio from the coefficients in the balanced equation and multiply by the ratio.

Convert moles of H2 to grams of H2  using the given amount of grams and the molar mass ( 2.01588 g/mol ).

Revise your answer to have the correct number of significant figures.