Of the following displacement
does not occur
(1) zn +2h → zn2+ + h, 1
(2) fe + 2ag → fe²+ + ag +
(3) cu + fe2+ → cu2+ + fet
(4) zn + pb2+ + zn2+ + pb
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Don't spam useless answers. give the symbol of elements and atomic no. and mass no. and no. of particles/ electron protron neutrons ​

Calculate the mass of sulfur dioxideproduced by burning 16 g of sulfur inexcess of oxygen in contact process.(average atomic mass : s - 32 u.0-16 )​

Two vessels contain mixtures of honey and water in the ratio of 8: 1 and 1: 5 respectively. the contents of both of these are mixed in a specific ratio into a third vessel. how much mixture must be drawn from the second vessel to fill the third vessel (capacity 36 gallons) completely in order that the resulting mixture may be half honey and half water?