Electrostatic Force between the sodium ion and the chloride ion.

AI Thread Summary
In solid sodium chloride, the electrostatic force between the sodium ion and the chloride ion can be calculated using Coulomb's law. The formula applied is F=k|q1*q2|/r^2, where k is the Coulomb's constant, q1 and q2 are the charges of the ions, and r is the distance between them. The calculated force is approximately 2.94e-9 N, but there are issues with submission on Connect, indicating a possible error. The direction of the force is attractive, as the sodium ion is positively charged and the chloride ion is negatively charged. Clarification on the calculation or submission process may be needed for accuracy.
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In solid sodium chloride (table salt), chloride ions have one more electron than they have protons, and sodium ions have one more proton than they have electrons. These ions are separated at about 0.28 nm. Calculate the electrostatic force between the sodium ion and the chloride ion.

What I did was the following:
F=k|q1*q2|/r^2

F=8.99e9(1.602e-19*1.602e-19)/(2.8e-10)^2
F= 2.94e-9 N

I try to submit it on Connect but it says is wrong. I tried with 2.94e-9 N and 2.9e-9 N. Can someone please tell me what I'm doing wrong.
 
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