Why does increasing the pressure of a gas increase the reaction rate? A. it increases the temperature of the gas.
B. it increases the reaction-rate constant.
C. it increases the activation energy.
D. if increases the number of collisions

d it increase the number of collisions

Explanation:

cos collision is a type reaction to other particles

Hope that helps you

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Option A may be I think

n has four pairs of electrons in the valence shell, electrons repel one another ,n has 7 protons in its nucleus, and since n has 7 protons, it must fill the second shell, giving it 4 pairs of electrons. the electrons form 3 bonds and 1 lone pair of electrons. each pair of electrons repels the other pairs, so they are equally far apart.

so all of the above

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.