Consider a continuous flow stream in a process which contains a mixture of benzene (b), toluene (t), xylenes (x), and 1,2-dichlorobenzene (d). the volumetric flow rate for the stream is 250 ml/min. the composition is 20% b by mass and 30% t by moles. there are three times as many moles of x as there are moles of d. assume the density of mixture is 0.97 g/ml and molar masses of each component are as follows: mb = 78.11 g/mol; mt = 92.14 g/mol; mx = 106.16 g/mol; md = 147.01 g/mol. (maintain 4 significant figures for all calculations). a) what is the stream's total molar flow rate (mol/min)? [ans: 2.440 mol/min] b) what are the mole fractions of each component in the stream? c) what is the weight fraction of (x) in the stream?

Why do you suppose the structural polysaccharide cellulose does not contain branches? why do you suppose the structural polysaccharide cellulose does not contain branches? branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into globules, thereby decreasing the flexibility and strength of the globules. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into microfibrils, thereby increasing the rigidity and strength of the microfibrils. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into globules, thereby increasing the flexibility and strength of the globules. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into microfibrils, thereby decreasing the rigidity and strength of the microfibrils.

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.