3.10 grams of a weak acid, HNO2 was dissolved in 525 mL of water. The Ka value of HNO2 is 4.00 x 10-4. What is the pH of the weak acid solution?

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

i think that the answer is c