Question

please answer this...
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Answer 1

Answer:

1.Mole=The mass of substance containing the same number of fundamental units is defined as mole

2.Sulphate(so4)3

Chloride(ycl3)

Valency=3+

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Explanation:

Answer 2

Answer:

Q.1) Mole(according to science): It is a unit used to measure particles

like atoms,etc.

1 Mole of any substance = 6.022 x 10²³ atoms.

No.of moles of any substance = Given mass/Molecular mass

Q.2)  a) Valency of y = 3(you can find that out while writing the chemical formula by cross multiplying)

b)  i) Y2{SO4}3

    ii) YCl3