The compound As2I4 is synthesized by reaction of arsenic metal with arsenic triiodide. If a solid cubic block of arsenic (d = 5.72 g/cm3 ) that is 3.00 cm on edge is allowed to react with 1.01 * 10^24 molecules of arsenic triiodide, how much As2I4 can be prepared? If the percent yield of As2I4 was 75.6%, what mass of As2I4 was actually isolated?

Mass As₂I₄ actually isolated : 626.27 g

Reaction

2As+4AsI₃⇒3As₂I₄

mass As : ρ x V

mol As (MW 75 g/mol) :

mol AsI₃ :

Limiting reactant :

As:AsI₃ =

mol As₂I₄ :

mass As₂I₄ (Mw=657.461 g/mol)

For 75.6% yield :

un recipient conține 6,4 moli de gaz. gazul hidrogen reprezintă 25% din totalul kilometrilor din container. în cazul în care presiunea totală este de 1.24 atm ceea ce este