<span>On the periodic table, the majority of elements are classified as "Metals"
In short, Your Answer would be Option A
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Answer:The molecular formula of the oxide of metal be
. The balanced equation for the reaction is given by:

Explanation:
Let the molecular formula of the oxide of metal be 

Mass of metal product = 1.68 g
Moles of metal X =
1 mol of metal oxide produces 2 moles of metal X.
Then 0.03005 moles of metal X will be produced by:
of metal oxide
Mass of 0.01502 mol of metal oxide = 2.40 g (given)

y = 2.999 ≈ 3
The molecular formula of the oxide of metal be
. The balanced equation for the reaction is given by:

Not sure about #6 , but i got all the other answers
A: Na3PO4 + MnCl2 > Mn3(PO4)2 + NaCl