Answer: 2.796 grams
Explanation:
According to stoichiometry:
1 mole of 
reacts with 1 mole of 
0.012 moles of will react with=
of
Thus is the limiting reagent as it limits the formation of product. is the excess reagent as (0.018-0.012)=0.006 moles are left unused.
1 mole of produces 1 mole of 
0.012 moles of will produce= of
Mass of 
Thus 2.796 grams of are produced.
Element Symbol Mass Percent
Sodium Na 27.367%
Answer:
the mass of the copper piece is 110.2976 grams
I believe that the best answer among the choices provided by the question is
<span>D.[HI] in experiment A equals 1/2[I2] in experiment B.</span>
Hope my answer would be a great help for you. If you have more questions feel free to ask here at Brainly.
Answer:
Petroleum ether was the incorrect eluant.
Explanation:
In column chromatography, there must be a mobile phase (eluant) and a stationary phase(adsorbent column). The mobile phase in this case is petroleum ether while the stationary phase is silica gel.
If no separation is observed, then it simply means that the wrong choice of mobile phase(eluant) was made. If a better choice of eluant is made, it can effectively achieve the separation of the mixture. The components of the mixture have a great affinity towards the petroleum ether hence they moved rapidly through the column and separation was not achieved.
