Explanation

The atomic mass of sodium is 23 g/mol.  

- This means 1 mole (6.022 × 10²³ atoms) of sodium weighs 23 grams.  

- So, the mass of one atom of sodium is:

= 23 g / Nₐ  

= 23 / (6.022 × 10²³) grams

So the correct option is: 23 / Nₐ g.

Explanation

The hypothalamus is the primary control center for body temperature regulation,

And it works in conjunction with blood vessels near the skin surface (which can adjust blood flow to control heat loss)

And skeletal muscles (which can generate heat through shivering). 

Explanation

 Proteins are indeed large molecules that cannot pass through the pores of a dialysis membrane due to their size,

Allowing dialysis to be used for purification or buffer exchange by separating them from smaller molecules and ions. 

Explanation

A gas behaves non-ideally at low temperature and high pressure. 

At low temperatures, molecules have less kinetic energy,

Meaning they move more slowly and are more likely to experience intermolecular forces, which causes them to deviate from ideal behavior. High pressure also contributes to non-ideal behavior because the molecules are closer together, leading to increased interactions. 

Explanation

 The statement correct for all viruses but not for all bacteria and fungi is They have a Nucleus Containing DNA or RNA.

Viruses:

Viruses are obligate intracellular parasites, meaning they lack a nucleus and replicate inside the host cell's nucleus.

They have genetic material (DNA or RNA) but not housed within a nucleus. 

Bacteria and Fungi:

Bacteria and fungi are cells, and while some bacteria are prokaryotic (lacking a nucleus), they still have their own DNA or RNA contained within a nucleus-like structure.

Some fungi have a cell wall made of cellulose, but not all. 

Explanation

One parent (at least) must be heterozygous.

Blood group genetics:

Blood type is determined by three genes, A, B, and O. A and B are dominant over O, meaning if someone inherits even one A or B gene, they will have blood type A or B, respectively.

If they inherit two O genes, they will have blood type O. 

Scenario:

If one brother has blood type A (could be AA or AO genotype) and the other has blood type O (OO genotype), they must have inherited an O gene from each parent.

This means that at least one parent must be heterozygous (AO) for the A gene to produce an A blood type child and an O blood type child. 

Explanation

Explanation

The right ventricle is responsible for pumping deoxygenated blood to the lungs.

While the right atrium receives blood from the vena cava, it only needs to passively push that blood into the right ventricle.

The right ventricle, however, needs to generate significant force to propel the blood through the pulmonary artery to the lungs.

This requires a thicker, more muscular wall. 

Explanation

 Damage to the cerebellum as a result of injury most likely causes poor coordination of movements. 

The cerebellum is primarily responsible for coordinating muscle movements, balance, and fine motor control.

So, damage to this area would lead to clumsiness, an unsteady gait, and difficulty with precise movements. 

Explanation

Stoichiometry calculations can only be carried out when all of the above are true:

Irreversible reactions:

Stoichiometry calculations are based on the assumption that the reaction proceeds to completion, meaning all reactants are used up to form products. 

No side reactions:

Side reactions would introduce additional products and complicate the calculations. 

At least one reactant consumed completely:

Stoichiometry calculations determine the amount of products formed based on the amount of a limiting reactant.