marissagirl4688 marissagirl4688
  • 26-04-2018
  • Chemistry
contestada

When 15.0 g of zinc metal reacts with excess hcl, how many liters of h2 gas are produced at stp?

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mkryukova19 mkryukova19
  • 26-04-2018
M(Zn)=65.4 g/mol
15.0g Zn*1mol Zn/65.4 g Zn = 15/65.4 mol Zn

                               Zn +2HCl--->ZnCl2 + H2
by equation          1 mol                            1 mol
from the problem 15/65.4 mol                15/65.4 mol

Molar volume of any gas under STP = 22.4 L/mol

 15/65.4 mol H2 * 22.4 L/1 mol= 5.14 L H2


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