wdevinier wdevinier
  • 12-07-2017
  • Chemistry
contestada

. What is the mass, in grams, of a sample of 7.83 × 1024 atoms of helium (He)?

Respuesta :

zrh2sfo
zrh2sfo zrh2sfo
  • 25-07-2017
moles He = 7.83 x 10^24 / 6.02 x 10^23 =13.0 

mass He = 13.0 mol x 4.00 g/mol = 52.0 g
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