A lone oxygen atom has 6 electrons in its outer shell which is not very stable, whereas as full octet (8 outer shell electrons) is stable. In order to achieve this two oxygen atoms will share 4 electrons, each contributing 2 electrons. Since these electrons exist within the orbitals of both atoms, to oxygen atoms essentially achieve a full octet.
Answer:
-NH3
Explanation:
amines are nitrogen containing compounds
Mole =mass ÷ Mr
∴mass = mole×Mr =0.10 × (23+35.5) = 5.85
the answer is D...
The Mr is obtained from the periodic table
Answer:
552.22
Explanation:
density=Mass/volume
therefore, Mass=density×volume
Mass=3.84*136
Answer:
Explanation:
You can see that in each molecule of Al2Si4O10(OH)2 there are 2 atoms of Al
so
moles Al = 2 x moles Al2Si4O10(OH)2
= 2 x 2.70 mol
= 5.40 moles of Al
