Question

Define the following
(i) Molarity (ii) Molality
(iii) Normality​

Answer 1

Significance of Thumb Opposition

Significance of Thumb OppositionAlthough prehension is evident in many forms of animal life, it attains maximum function in humans given the addition of thumb opposition. Opposition involves rotation at the carpometacarpal joint of the thumb to place the thumb pad diametrically opposite to the pad of one or all of the other digits (see Figure 14-4). The thumb, because of its unique ability to oppose, is a common feature in most grip classifications, contributing 40% to 70% of total hand function

Answer 2

1. Molar concentration is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of amount of substance per unit volume of solution

2.Molality is a measure of number of moles of solute present in 1 kg of solvent. This contrasts with the definition of molarity which is based on a specified volume of solution.

3.Normality is a measure of concentration equal to the gram equivalent weight per litre of solution. Gram equivalent weight is the measure of the reactive capacity of a molecule.

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