As per the given question, the valence for most of these metals are X, Y, and Z is 1,2,3 we can determine the formula of each compound.
1. Hydroxides.
A hydroxide is formed when an oxide of a metal reacts with water. When this happens, the general molecular formula is:
Meₐ(OH)ₙ
Where:
a: valence or charge of the hydroxide (Which is -1)
n: valence of the metal.
Following this, the formula for X, Y and Z would be:
XOH
Y(OH)₂
Z(OH)₃
2. Sulphates
Sulphates follow a similar rule of hydroxide in the general molecular formula, but instead of having a charge of -1, it has a charge of -2 so:
Mₐ(SO₄)ₙ
So, following the rule:
X₂SO₄
Y₂(SO₄)₂ ------> YSO₄
Z₂(SO₄)₃
3. Hydrogens
Following the same rule as the previous, hydrogens work with a charge of -1, so:
MₐHₙ
Then:
XH
YH₂
ZH₃
4. Carbonates.
This follows the same rule as sulphates, with the same charge so:
Mₐ(CO₃)ₙ
Then:
X₂CO₃
YCO₃
Z₂(CO₃)₃
5. Nitrates
Follow the same rule as the hydroxides, with the same charge of -1.
Mₐ(NO₃)ₙ
Then:
XNO₃
Y(NO₃)₂
Z(NO₃)₂
6. Phosphates
In the case of phosphates, these have a charge of -3 so:
Mₐ(PO₄)ₙ
Then:
X₃PO₄
Y₃(PO₄)₂
Z₃(PO₄)₃ ----> ZPO₄
Learn more about valencies here,
https://brainly.com/question/12744547
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