The liquid iodomethane has a density of 2.28 g/mL at 20.0°C. If a 109 gram sample of this compound is needed, what volume of the
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53.14 grams of Zn will be produced from 26.0 g of Zn and 42.0 g of HCl.
Explanation:
Balanced chemical reaction:
Zn + 2 HCl ⇒ Zn +
data given:
mass of Zn = 26 grams
mass of HCl = 42 grams
mass of Zn = ?
here in the reaction Zn is the limiting reagent so mass of
Zn formed will be determined by it.
atomic mass of zinc =65.38 grams/mole
number of moles =
putting the values in the above equation:
number of moles of zinc =
number of moles of zinc = 0.39 moles
From the balanced reaction it is seen that
1 mole of Zn produced 1 mole of Zn
0.39 moles will produce x moles of Zn
0.39 moles of Zn (atomic mass of Zn = 65.38 grams/mole)
mass = atomic mass x number of moles
= 0.39 x 136.28
= 53.14 grams
53.14 grams of Zn is formed