Answer:
Mass = 0.014 g
Explanation:
Given data:
Mass of HCl = 0.500 g
Mass of hydrogen gas produced = ?
Solution:
Chemical equation:
Zn + 2HCl → ZnCl₂ + H₂
Number of mole of HCl :
Number of moles = mass/molar mass
Number of moles = 0.500 g / 36.5 g/mol
Number of moles = 0.014 mol
Now we will compare the moles of HCl with hydrogen.
HCl : H₂
2 : 1
0.014 : 1/2×0.014 = 0.007
Mass of hydrogen gas:
Mass = number of moles × molar mass
Mass = 0.007 mol × 2 g/mol
Mass = 0.014 g
