Small samples of oxygen gas needed in the laboratory can be generated by any number of simple chemical reactions, such as 2 KCl 
(s) → 2 KCl (s) + 3 
(g)
What mass of oxygen (in grams) is produced when 122.6 g of KCl 
(formula mass = 122.6 amu) takes part in this reaction?
Definitions:
MRS
The speed at which a consumer is prepared to exchange one product for another while keeping the same degree of happiness or utility.
Travel
The act of moving from one place to another, which can be for various purposes such as leisure, business, or exploration.
Marginal Cost
Marginal cost is the cost increase for producing one more unit of a good or service, adding to the total cost.
Marginal Benefit
The additional benefit received from the consumption of one more unit of a good or service.
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