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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 atomic mass of C is 12.01 g/mole. The atomic mass of H2 is 2.016 g/mole. Finish the problem by choosing the correct format for dimensional analysis.

Respuesta :

AbhiGhost
Since H2O is excess, C is limiting reagent and it will decide the amount of H2 formed. Moles of C = 34/12.01 = 2.83. According to stoichiometry, moles of C = moles of H2. Therefore, moles of H2 = 2.83. Mass of H2 formed = moles of H2 formed x molar mass of H2 = 2.83 x 2.016 = 5.70528 grams. 
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Answer:

Correct dimensional analysis is below.

Explanation:

34g       1 mole c         1 mole H2       2.016g H2

___  x  ________  x   ________  x  _________

             12.01g C         1 mole c          1 mole H2

Hope this helps.

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