My grandmother left me some silver years ago. I opened the box containing the silver and it had tarnished. Using the equation below, if I had 300 g of silver that had tarnished and 175g H2S, which would be the limiting reactant?

Silver Ag will be the limiting reagent.

Explanation:

The balanced reaction is:

2 Ag(s) + H₂S(g) ⇒ Ag₂S(s) + H₂(g)

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of reactant and product participate in the reaction:

Being:

the molar mass of the compounds participating in the reaction is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate:

If you have 175g of H₂S, you can apply the following rule of three: if by stoichiomatry 34 grams of H₂S react with 215.74 grams of Ag, 175 grams of H₂S with how much mass of Ag does it react?

mass of Ag= 1,110.43 grams

But 1,110.43 grams of Ag are not available, 300 gra s are available. Since you have less mass than you need to react with 175 grams of H₂S, silver Ag will be the limiting reagent.

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periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.