1) Assume M refers to a general element and Z referes to other general element.
2) Assume the chemical formula of the ionic compound is MₓZₐ
3) Then the dissociaton would be written:
MₓZₐ → XMᵃ⁺ + AZˣ⁻
That means that the ionic compoud will lead to the X cations Mᵃ⁺ whose oxidation state are a+, and A anions Zˣ⁻ whose oxidation state is x⁻.
5) For example: MgBr₂ (aq) → Mg⁺² (aq) + 2Br⁻ (aq)
6) Explanation: since the water molecules are polar, they will surround (solvate) the three ions that form the compound MgBr₂, overcoming the electrostatic forces that hold together the atoms in the ionic lattice.
Cirrus clouds are only formed at very high altitudes (6000+ metres). At such temperatures temperatures are subzero and therefore cirrus clouds are made of ice crystals
Barium is Ba. Atomic no. 56 and atomic mass =137.3.
Phosphate is naturally occurring form of phosphorus. Phosphate is P. Atomin no. 15 and atomic mass =31.0.
The mass of the photo frame : = 549.12 g
<h3>Further explanation</h3>
Given
a photo frame
two 5.2 mm sheets = 0.52 cm
22 cm by 20 cm dimension
Required
the mass
Solution
The volume of one sheet = l x w x h
= 22 cm x 20 cm x 0.52 cm
= 228.8 cm³
Mass of one sheet :
= density x volume
= 1.2 g/cm³ x 228.8 cm³
= 274.56 g
So for two sheets of polycarbonate :
= 2 x 274.56 g
= 549.12 g
