Question

. (i) Calculate the number of molecules of sulphur (S8) present in 16 g of solid
sulphur.
(ii) In a reaction, 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid. The
products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium ethanoate.
Show that these observations are in agreement with the law of conservation of
mass,
sodium carbonate + ethanoic acid —> sodium ethanoate + carbon dioxide + water.
(iii) Write the formulae of two divalent anions.​

Answer 1

Answer:

1).3.764×1022.

2).11.3g

3).divalent cation - Mg^2+(magnesium)

divalent anion - O^2-(oxide)