If the original sample of Zn had a mass of 1.4 g, what mass of ZnCl2 can be produced in the reaction?

Zinc reacts with chlorine to produce zinc chloride
The reaction can be represented as: Zn + Cl2 ---> ZnCl2
Next, we calculate the moles of Zn
using mass/molar mass of Zn (65.38g/mol)
Moles = 4g/65.38 g/mol = 0.021 moles
The stoichiometric ratio of zinc to ZnCl2 in this reaction is 1:1
Thus, the moles of ZnCl2 produced will also be 0.021 moles
Mass can be determined by number of moles multiplied by molar mass
The molar mass of ZnCl2 equals 65.38 + (35.2 x 2) = 136.38 g/mol
Consequently, the mass of ZnCl2 is calculated as 0.021 moles x 136.38 g/mol =2.86 grams