A mixture of oxygen, nitrogen, and hydrogen gases exerts a total pressure of 74 kPa. The partial pressure of the oxygen is 21 kPa and the partial pressure of the nitrogen is 45 kPa. What is the partial pressure of the hydrogen gas in this mixture? (1 sig fig)

i don,t know so just answer mine

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.

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;