Collision theory, theory used to predict the rates of chemical reactions, particularly for gases. The collision theory is based on the assumption that for a reaction to occur it is necessary for the reacting species (atoms or molecules) to come together or collide with one another.

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A rectangle has length c and width 2d. Another rectangle has length 4 and width (5-c). Write a simplified expression of their co

bonufazy [111]

The combined area is area of the first rectangle plus area of the second rectangle.
Area of first rectangle = c x 2d = 2cd
Area of second rectangle = 4(5 - c) = 20 - 4c

Combined area = 2cd + 20 - 4c

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