1. Amylose is a "polysaccharide" that plants use to store energy. It is made of repeating...

1. Amylose is a "polysaccharide" that plants use to store energy. It is made of repeating subunits of C6H10O5.

a. A particular amylose molecule has 2113 of these subunits, what is its molecular formula? Express your answer as a chemical formula.

b. What is its molar mass? Express your answer to four significant figures and include the appropriate units.

c. What is the empirical formula for amylose? Express your answer as a chemical formula.

Solutions

Expert Solution

A repeating unit in Amylose polysachharide is C₆H₁₀O₅.

Molar mass of this sub unit is 162 amu using atomic masses C(12amu), H(1amu), (16amu).

a) As Amyloze contains 2113 sub units C₆H₁₀O₅..

Moleculer formula of Amylose = 2113 x [C₆H₁₀O₅.]

= C_6x2113H_10x2113O_5x2113.

Moleculer formula of Amylose = C₁₂₆₇₈H₂₁₁₃₀O₁₀₅₆₅.

b) Molar mass of amylose = # of C₆H₁₀O₅ subunits x Mass of one C₆H₁₀O₅. subunit.

Molar mass of amylose = 2113 x 162 amu

Molar mass of amylose = 342306 amu

c) Empirical formula of AMylose is same as formula of subunit.C₆H₁₀O₅.

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queen_honey_blossom answered 1 year ago

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