The measure of hydrogen gas generated by placing a zinc nail of 2.2g would be:
B). [tex]0.75 l[/tex]
Given that,
Mass of Zinc [tex]= 2.2 g[/tex]
Molar mass of Zinc [tex]= 65g[/tex]
Chemical Reaction
[tex]Zn + 2HCl[/tex] → [tex]ZnCl2 + H2[/tex]
As we see,
[tex]1[/tex] hydrogen mole is given by 1 zinc mole
We also know,
Temperature and Pressure = standardized
so,
[tex]1[/tex] mole would contain [tex]22.4 l[/tex]
∵ [tex]1[/tex] zinc mole will provide [tex]22.4[/tex] l of hydrogen gas.
Now, we will find the number of zinc moles
[tex]= given mass/molar mass[/tex]
[tex]= 2.2/65[/tex]
[tex]= 0.035[/tex] moles
Thus,
The amount of hydrogen gas(H2) produced by [tex]0.035[/tex] moles would be:
[tex]= 0.0335[/tex] × [tex]22.4[/tex]
[tex]= 0.75 l[/tex]
Thus, option B is the correct answer.
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