Which formula equation represents the burning of sulfur to produce sulfur dioxide?
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Considering the definition of molar mass, the number of moles of Zn reactant used is 2 moles.
<h3>Definition of molar mass</h3>The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.
<h3>Number of moles of Zn used</h3>The balanced reaction is:
Zn(s) + 2 HCl(aq) → ZnCl₂ + H₂(g)
Assume that 130.8 grams of Zn was used in this reaction.
To determine the number of moles of hydrogen gas formed, you need to know the number of moles of Zn reactant was used.
So to determine the number of moles used you know that the molar mass of Zn is 65.37. Then:
Solving:
number of moles× 65.37= 130.8 g
<u><em>number of moles≅ 2 moles</em></u>
Finally, the number of moles of Zn reactant used is 2 moles.
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