Answer:
0.234 moles
Explanation:
moles of Al2O3 = mass / molar mass
moles of Al2O3 = 23.87g / 102.0g/mol
moles of Al2O3 = 0.234 moles (to three significant figures)
Answer:
Explanation:
(3 pts) A 5.00 gram sample of an oxide of lead PbxOy contains 4.33 g of lead. Determine the
simplest formula for the compound.
The reaction s that are redox reactions are
4Li(s) +O2 (g)→ 2Li2O (s)\
Mg(s) + Fe2+ (aq)→ Mg2+(aq) + Fe(s)
<h3>Explanation</h3>
A redox reaction involve both oxidation and reduction. During redox reaction there is change in oxidation states. For example in
4Li +O2 →2Li2O Li is oxidized while O is reduced
in Mg +Fe2+ → Mg2+ +Fe Mg is oxidized since it move from oxidation state 0 to 2+ while Fe2+ is reduced since it move from oxidation state of 2+ to 0
One can only hold 2 electrons which only means shell two can hold 8, and for the first eighteen elements shell three can hold a maximum of eight electrons
