Answer:
pH = 2.66
Explanation:
weak acid:
∴ Ka = 5 E-5 M = [H+][A-]/[HA]
∴ [HA] = 0.10 M - [A-]
∴ [H+] = [A-]
⇒ Ka = [H+]²/(0.10 - [H+])
⇒ [H+]² + 5 E-5[H+] - 5 E-6 = 0
⇒ [H+] = 2.211 E-3 M
⇒ pH = - Log [H+]
⇒ pH = 2.6553
Explanation:
1) There are three sub atomic particles; protons, neutrons and electrons. Protons and Neutrons are found in the nucleus while electrons are found in orbitals outside the Nucleus.
2) No. This is not always the case. An example is sodium which has atomic mass of 23.
Atomic Mass = Neutrons + Protons
23 = Neutrons + 11
Neutrons = 23 - 11 = 12
In sodium there are 11 protons and 12 neutrons
Option A: Clouds
In the morning, air is cool and as sun begins to rise it starts increasing the temperature of air. By time, the air becomes warmer and warmer. Depending upon the surrounding conditions, air in different areas heat up at different rates.
Due to this heating, thermal formation takes place, this is due to uneven heating of surface of earth. The thermal formation at surface causes difference in temperature of surface of the earth and air around it. The warm air has tendency to rise thus, the air in the thermal rise and expand. Due to expansion it cools down, this process continues till the temperature of thermal air reaches equals to the temperature of surrounding air. This results in the formation of cloud.
Thus, when a humid air mass rises into a cooler temperature area, clouds formation takes place