Answer:
Mass = 18.9 g
Explanation:
Given data:
Mass of Al₂O₃ formed = ?
Mass of Al = 10.0 g
Solution:
Chemical equation:
4Al + 3O₂ → 2Al₂O₃
Number of moles of Al:
Number of moles = mass/molar mass
Number of moles = 10.0 g/ 27 g/mol
Number of moles = 0.37 mol
Now we will compare the moles of Al and Al₂O₃.
Al : Al₂O₃
4 : 2
0.37 : 2/4×0.37 = 0.185 mol
Mass of Al₂O₃:
Mass = number of moles × molar mass
Mass = 0.185 mol × 101.9 g/mol
Mass = 18.9 g
Answer:
Iodine, Silicon, Copper.
Explanation:
Iodine is an insulator, which doesn't conduct electricity. Silicon is a semiconductor. Copper is a conductor.
Answer:
D.gain enough kinetic energy to get past each other.
Explanation:
Melting can be best described as a process in which molecules gain enough kenetic energy to put past each other.
I think the answer is Joule.
As an amount of energy (being transferred), the SI unit of heat is the joule (J).
