The acid digestion test left 2.595 g of fiber from a composite specimen weighing 3.697 g. The composite specimen weighs 1.636 g in water. If the specific gravity of the fiber and matrix is 2.5 and 1.2, respectively, find the 1. Theoretical volume fraction of fiber and matrix 2. Theoretical density of composite

0.4323 ; 1.5394

Explanation:

Given that :

Specific gravity of Fibre (Sf) = 2.5

Specific gravity of Matrix (Sm) = 1.2

Mass of Fibre, Mf = 2.595g

Weight of composite specimen in water , Wc = 1.636g

Composite weight, Ww = 3.697 g

Weight of Fibre and matrix

Volume fraction of Fibre and matrix :

[(Mf/Sf) ÷ (Mf/Sf + Wc/Sm)] * 100

[(2.595/2.5) ÷ (2.595/2.5 + 1.636/1.2)]

(1.038 ÷ 2.4013333)

= 0.43225986

= 0.4323

2.)

Theoretical density of composite :

Weight of composite / (Mf/Sf + Wc/Sm)

3.697 / (2.595/2.5 + 1.636/1.2)

3.697 / 2.4013333

= 1.5395613

= 1.5394

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.  

did anyone actually do this? like if anyone has submitted this i rly need .