The law of mass action suggests that
the higher concentration of molecules, the faster a reaction can occur
heat affects the rate of chemical reaction
equal amounts of reactants yield equal amounts of products

Explanation:

The law of mass action states that the rate of a chemical reaction is directly proportional to the product of the masses of the reactor. In other words, the more molecules concentration, the faster the reaction can develop.

Therefore, the choice that completes the given statement is the first one: "the higher concentration of molecules, the faster a reaction can occur".

So, the completed statement is The law of mass action suggests thatthe higher concentration of molecules, the faster a reaction can occur.

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

where is unknown. because the position is parabolic, there is symmetry about the midpoint at , and we know that

so that the position function is

which means the velocity is

then the total distance traveled is

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at and ends at , so its displacement is 0.

the doppler effect is used by weather forecasters to measure 

moving clouds