Astudent performs the reaction shown below.
naoh + hcl → nacl + h2o
she increases the concentrations of naoh and hcl, and finds that nacl is produced much more quickly. which explains the outcome of her experiment?
naoh and hcl molecules collide more frequently at higher concentrations. (i think it's this one)
nacl requires a high concentration for any reaction to occur.
hcl acts as a catalyst, but only at high concentrations.
the higher concentrations create a higher temperature in the solution.

Option (a) is the correct answer.

Explanation:

According to collision theory, more is the number of collisions more will be the rate of reaction, that is, more quickly product will be formed.

Therefore, when we increase the concentration of reactants then there will be increase in number of reactant molecules. Hence, more will be the reactant molecules more will be the collisions.

Thus, we can conclude that in the given reaction NaOH and HCl molecules collide more frequently at higher concentrations.

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.