Answer:
c. crystallization
Explanation:
The opposing process that occur in a solution in contact with undissolved solute are dissolution and crystallization.
In the dissolution process the solid substance coverts into liquid state and mixes with solution. Whereas in Crystallization the the chemical is converted from the liquid solution to solid crystal state.
The formula for K+ and S-2 is K2S because you need 2 potassium ions to balance out the sulfide ion
Answer:

Explanation:
Hello,
In this case the undergoing chemical reaction is:

Next we identify the limiting reactant with the given amounts of methane and oxygen by computing the available moles of methane and the moles of methane consumed by the 133 g of oxygen:

In such a way, the limiting reactant is methane with 0.75 moles which produce the following mass of carbon dioxide:

Best regards.
I swear i think it is 3.22