An equilibrium mixture of co, o2 and co2 at a certain temperature contains 0.0010 m co2 and 0.0100 m o2. at this temperature, kc equals 1.4 × 102 for the reaction: 2 co(g) + o2(g)⇌2 co2(g). what is the equilibrium concentration of co?
a) 7.1 × 10-7 m.
b) 8.4 × 10-4 m.
c) 1.4 × 10-2 m.
d) 1.2 × 10-1 m.

The correct answer is Option B.

Explanation:

Equilibrium constant in terms of concentration is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as

The given chemical reaction follows:

The expression of for above reaction is:

We are given:

Putting values in above equation, we get:

Hence, the correct answer is Option B.

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why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.