50 points quickly

for which pair of objects would adding the same amount of electrons to each object result in a decrease in the electric force?

two positively charged objects
two negatively charged objects
two objects that have no charge
two objects that have opposite charges x not this one

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

At a temperature of 393 k, the temperature of a sample of nitrogen is 1.07 atm what will the pressure be at a temperature of 478 k

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present