Find the magnitude of the electrostatic force between a na+ ion and a cl− ion separated by 0.46 nm. n (b) would the answer change if the sodium ion were replaced by li+ and the chloride ion by br−?

electrostatic force = 1.08 ×  N

and if sodium ion replace by Li+ and chloride by Br− then there will be no change in electrostatic force

magnitude of electrostatic force will be same

Explanation:

given data

separation d = 0.46 nm = 4.6 × m

to find out

electrostatic force between Na+ and Cl− ion

and if sodium ion replace by Li+ and chloride by Br−

solution

we know electrostatic force formula that is

electrostatic force = K ×Q1×Q2 / d²          .........................1

here k is coulombs constant that is = 9 × and Q1 and Q2 is

charge that is Q1 = + 1.6 × C

and Q2 = - 1.6 ×  C

so put all these value in equation 1

electrostatic force = K ×Q1×Q2 / d²

electrostatic force =  9 ×  ×1.6 × × -1.6 × / (4.6 ×)²

so electrostatic force = 1.08 ×  N

and if sodium ion replace by Li+ and chloride by Br− then there will be no change in electrostatic force

so magnitude of  electrostatic force will be same

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27