A 5.71 g of an unknown metal sulfate with formula M2SO4, was dissolved in water and treated with excess aqueous barium nitrate, resulting in the precipitation of all the sulfate ions as barium sulfate. The precipitate was collected, dried, and found to weigh 3.68 g. Determine the atomic mass of M, and identify M

idk

Explanation:

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

28528289 29823282 8298232 39858