Explanation

Hemoglobin is a large protein (macromolecule) made up of four polypeptide chains, each with a heme group.

It contains approximately 68,000 atoms, including carbon, hydrogen, oxygen, nitrogen, iron, and sulfur.

Explanation

Lithium aluminium hydride (LiAlH₄) is a strong reducing agent.

It reduces carboxylic acids to primary alcohols effectively.

Explanation

The Born-Haber cycle is a thermodynamic cycle used to calculate the lattice energy of ionic compounds.

It uses known values like ionization energy, electron affinity, and enthalpies to find the unknown lattice energy.

Explanation

Hadrons are particles that participate in strong nuclear force and include protons, neutrons, and heavier particles.

They are generally equal to or heavier than protons in mass.

Explanation

A proton is made of two up quarks and one down quark (uud).

This combination gives the proton its positive charge (+1).

Explanation

Dauntless means بہادری اور عزم

Fearless means خوف کے بغیر

Explanation

INHOSPITABLE بے مہمان نواز

Unkind بے رحم

Explanation

 When I met him, he was going to college.

The sentence is referring to a past event (When I met him),

So the action happening at that moment in the past should be in the past continuous tense: He was going to college.

Explanation

The pressure of oxygen in the lungs is 104 torr. 

The partial pressure of oxygen in the lungs, also known as the alveolar partial pressure of oxygen (PaO2),

It is the pressure exerted by oxygen within the alveoli.

At sea level, atmospheric pressure is 760 mmHg.

Since oxygen makes up approximately 21% of air,

The partial pressure of oxygen in atmospheric air is 0.21 x 760 mmHg = 159.6 torr

However, as air enters the alveoli, it mixes with water vapor and carbon dioxide, which slightly reduces the oxygen partial pressure.

Therefore, the actual partial pressure of oxygen in the alveoli is around 104 torr. 

Explanation

 A NiCad (Nickel-Cadmium) battery has a nickel oxide hydroxide (NiO2) cathode and a cadmium anode.