isbelhernandez isbelhernandez
  • 23-03-2020
  • Chemistry
contestada

Zn + 2HCI --> ZnCl2 + H2
How many moles of hydrogen can you make with 7.9 g Zn?
mol
7.90 mol
65.38 mol
0.24

Respuesta :

jaimetudor jaimetudor
  • 23-03-2020
moles= mass\ relative formula mass(Ar)
moles of zinc= 7.9/30= 0.263
so we have 0.263 moles of zinc, and you need twice the amount of chlorine so therefore 0.526moles of chlorine= 0.526x 17=8.942g of chlorine
i cba to work the rest out but the most reasonable answer is 0.24 mol however if you need to use working outs, use the formula i provided earlier
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