Answer:
D. 9.0x10²³ atoms
Explanation:
First we use <em>Avogadro's number</em> to <u>calculate how many molecules of Si₂H₆ are there in 0.75 mol</u>:
- 0.75 mol * 6.023x10²³ molecules/mol = 4.52x10²³ molecules
There are 2 Si atoms in one Si₂H₆ molecule, that means that in 4.52x10²³ Si₂H₆ molecules there will be:
- 2 * 4.52x10²³ = 9.03x10²³ Si atoms
Thus the answer is option D.
C. Explanation since laws are already proven and doent need to be proven further
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Answer:
The ratio of aluminium and oxygen ions that only exists is 2:3
Since Aluminium has <u>3 valence electrons</u> and oxygen has <u>2 vacant orbitals</u>
Aluminium holds a valence of 3 and oxygen 2, when they react a compound of formula
is formed