Answer:
The electric force between them decreases
Explanation:
The force between two charged particle is given by :

Where
r is the distance between charges
If the distance between the charges is increased, the electric force gets decreased as there is an inverse relation between force and distance.
Hence, the correct option is (c) "The electric force between them decreases"
P(total)=P1+P2+P3+...
P(total)=P(N2)+P(others)+P(O2)
100kPa=78kPa+1kPa+P(O2)
P(O2)=100-79=21kPa
The subscripts tell the ratio of one element to another in a
compound. In this case, there are 4 P atoms per 10 O atoms. This could also be
interpreted as 4 mol P per 10 mol O. Therefore:
Mol P = (38.5 mol P4O10)/(4 mol P/ 1 mol P4O10) = 154 mol P