Answer:
8.25 moles of oxygen will be produced.
Explanation:
Given a balanced chemical equation;
2Al₂O₃ ------> 4Al + 3O₂
from the balanced chemical equation above, 3 moles of Oxygen are produced when 4 moles of Aluminum are produced.
4 moles of Al --------> 3 moles of Oxygen
11 moles of Al --------> ?
Therefore, 8.25 moles of oxygen will be produced.
Answer:
Physical change
Explanation:
Because it doesn't require any chemical to change
Answer: an electric generator
Explanation:
Answer:
77 moles
Explanation:
The given chemical compound is CCl2F2 is called Dichlorodifluoromethane. In CCl2F2, we have:
one mole of a Carbon atom.
two moles of Chlorine atom; &
two moles of Fluorine atom.
Given that one mole of Chlorine = 38.5 moles.
Then, two moles will be:
= 2 × 38.5 moles
= 77 moles
Answer:
Lead (II) iodide
Explanation:
The reaction of lead (II) nitrate, Pb(NO₃)₂ with KI is:
Pb(NO₃)₂(aq) + 2KI(aq) → KNO₃(aq) + PbI₂(s)
This is a typical double-replacement reaction where anions and cations exchange its couple.
All nitrates are solubles, thus, KNO₃ is not the precipitate.
The only possibility of precipitate is PbI₂,
Lead (II) iodide, a yellow and insoluble solid...
