Silver tarnishes in the presence of oxygen and hydrogen sulfide according to the following equation:
4Ag(s) + 2H_S(g) + O2(g) → 2Ag, S(s) + 2H2O(1)
tarnish
Usually, H, S is the limiting reactant. If a silver spoon is placed in a container
that holds 62.1 mL of H, S at 1.15 atm and 23.0°C, how many grams of silver
on the spoon will tarnish?

the mass of the cathode increases because ions from the solution get reduced to atoms and become part of the cathode.

explanation:

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answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.