Consider the water-shift gas reaction: H2O(g)+CO(g)H2(g)+CO2(g) A closed reaction vessel maintained at 300°C is filled with 0.255 M H2 and 0.260 M CO2. At equilibrium, their respective concentrations are 0.220 and 0.225 M. The value, 40 , represents Choose one or more:' the law of mass action. the mass action expression. the equilibrium constant expression. the equilibrium constant.
Consider the water-shift gas reaction:
H2O(g)+CO(g)H2(g)+CO2(g)
A closed reaction vessel maintained at 300°C is filled with 0.255 M H2 and 0.260 M CO2. At equilibrium, their respective concentrations are 0.220 and 0.225 M.
The value, 40 , represents
Choose one or more:'
the law of mass action.
the mass action expression.
the equilibrium constant expression.
the equilibrium constant.
none of these.
The equilibrium constant, Kc, is unitless. Why?
Choose one:
In the expression for Kc, molarities are always used so units are redundant.
The concentration units are ignored. K actually has units if there are not equal numbers of M units in the numerator and the denominator.
The concentrations in K are theoretically ratios of the concentrations to an ideal standard of 1.000 M.
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