Calculation:
Molecular mass of Ca3(PO4) = (3 X 40) + (2 X 31) + (8 X 16)
Molecular mass of Ca3(PO4) = 310
Mass percentage of Ca =
![\[\frac{3\times 40}{310\times 100}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-371b6f322bd54bdc47ca48c6487006b3_l3.png "Rendered by QuickLaTeX.com")
Mass percentage of Ca = 38.71%
Mass percentage of P =
![\[\frac{2\times 31}{310\times 100}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-16c95ce5039f118eaffc3ea499b91684_l3.png "Rendered by QuickLaTeX.com")
Mass percentage of P = 20%
Mass percentage of O =
![\[\frac{8\times 16}{310}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-c08e0d831c6828f1a728223e39587805_l3.png "Rendered by QuickLaTeX.com")
Mass percentage of O = 41.29%
![\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{-2}](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-c5a91864ba7e1e0ed1b5d273d822f5e5_l3.png "Rendered by QuickLaTeX.com")
(b) ![\left[\mathrm{Pd}(\mathrm{CN})_{4}\right]^{2-}](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-ffda616d3dbe7dc8925722e87005924e_l3.png "Rendered by QuickLaTeX.com")
(c) ![\left[\mathrm{PdCl}_{4}\right]^{2-}](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-90cc6a4f4d42dee46e06d6f8ed516b7a_l3.png "Rendered by QuickLaTeX.com")
(d) ![\left[\mathrm{NiCl}_{4}\right]^{2}](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-149ee5c95bd9cfcc4405704fba2e1bab_l3.png "Rendered by QuickLaTeX.com")
(d) all of these