Question

Write the equation for the reaction of zinc with hydrochloric acid and balance the equation . Find out the number of molecules of hydrogen gas produced in this reaction , when 1 mole of HCl completely reacts at S.T.P. {Gram molar volume is 22.4 liters at S.T.P } {Avagadro's number is 6.023 * 10 to the power of 23}

Answer 1

Zn+2Hcl ---》ZnCl 2 +H 2
1mole+2moles----》1mole+1mole
2moles of Hcl---》1mole of H 2
1mole if Hcl---》x moles of H2
X=1×1/2 =1/2=0.5 moles of H 2
Imole of H 2---》6.023×10^23 molecules
0.5 moles of H 2 =6.023×10^23×0.
=3.0115×10&23 molecules....hope it is correct.