Final answer:
34 grams of carbon will produce 5.66 grams of H2 when reacted with an unlimited amount of H2O, using the molar mass of H2 (2 grams/mol) and the 1:1 molar ratio between carbon and H2 in the balanced equation.
Step-by-step explanation:
To calculate how many grams of H2 would be formed when 34 grams of carbon reacts with an unlimited amount of H2O, we first use the periodic table to determine the molecular mass of H2.
Hydrogen has an atomic mass of approximately 1 gram/mol, so H2 has a molecular mass of 2 grams/mol.
Next, looking at the balanced equation C + H2O → CO + H2, we see a 1:1 molar ratio between carbon and hydrogen gas. Since carbon has a molar mass of about 12 grams/mol, 34 grams of carbon is equivalent to 34 grams / (12 grams/mol) = 2.83 mol of carbon.
This means that 2.83 mol of hydrogen gas will be produced, since the molar ratio is 1:1.
To find the mass in grams, we multiply the moles of hydrogen gas by the molar mass of hydrogen gas.
Thus, 2.83 mol × 2 grams/mol = 5.66 grams of H2.