If the pKa of HCHO2 is 3.74 and the pH of an HCHO2/NaCHO2 solution is 3.11 which of the following is true.
- [HCHO2] < [NaCHO2]
- [HCHO2] = [NaCHO2]
- [HCHO2] << [NaCHO2]
- [HCHO2] > [NaCHO2]
-it is not possible to make a buffer of this pH from HCHO2 and NaCHO2

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.

the components of a vector are the parts of the vectors that are to each other.

b perpendicular