11. In a titration to determine the concentration of hydronium ions in a test solution, the test solution was titrated with a 0.250 mol/L sodium hydroxide solution. Using 40.0 mL of test
solution, an average of 10.5 mL of sodium hydroxide solution was used to reach the
endpoint.

Calculate the molar concentration of the hydronium ion in the test solution. (1 point)

A) .0456 mol/L

B) 0.556 mol/L

C) .0656 mol/L

D). 0625 mol/L

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j